GE Data Sheet
September 11, 2013 ©2013 General Electric Company. All rights reserved.
PicoTLynxTM 3A: Non-Isolated DC-DC Power Modules
2.4Vdc –5.5Vdc input; 0.6Vdc to 3.63Vdc output; 3A Output Current
Features
Compliant to RoHS EU Directive 2002/95/EC
(Z versions)
Compatible in a Pb-free or SnPb reflow environment
(Z versions)
Wide Input voltage range (2.4Vdc-5.5Vdc)
Output voltage programmable from 0.6Vdc to 3.63
Vdc via external resistor
Tunable LoopTM to optimize dynamic output voltage
response
Flexible output voltage sequencing EZ-SEQUENCE
– APTH versions
Remote sense
Fixed switching frequency
Output overcurrent protection (non-latching)
Overtemperature protection
Remote On/Off
Ability to sink and source current
Cost efficient open frame design
Small size: 12.2 mm x 12.2 mm x 6.25 mm
(0.48 in x 0.48 in x 0.25 in)
Wide operating temperature range (-40°C to 85°C)
UL* 60950-1Recognized, CSA† C22.2 No. 60950-1-
03 Certified, and VDE‡ 0805:2001-12 (EN60950-1)
Licensed
ISO** 9001 and ISO 14001 certified manufacturing
facilities
Applications
Distributed power architectures
Intermediate bus voltage applications
Telecommunications equipment
Servers and storage applications
Networking equipment
Industrial equipment
Description
The Pico TLynxTM 3A power modules are non-isolated dc-dc converters that can deliver up to 3A of output current. These
modules operate over a wide range of input voltage (VIN = 2.4Vdc-5.5Vdc) and provide a precisely regulated output voltage
from 0.6Vdc to 3.63Vdc, programmable via an external resistor. Features include remote On/Off, adjustable output voltage,
over current and overtemperature protection, and output voltage sequencing (APTH versions). A new feature, the Tunable
LoopTM , allows the user to optimize the dynamic response of the converter to match the load with reduced amount of output
capacitance leading to savings on cost and PWB area.
* UL is a registered trademark of Underwriters Laboratories, Inc.
† CSA is a registered trademark of Canadian Standards Association.
‡ VDE is a trademark of Verband Deutscher Elektrotechniker e.V.
** ISO is a registered trademark of the International Organization of Standards
TRIM
VOUT
SENSE
GND
CTUNE
RTUNE
RTrim
VIN
Co
Cin
Vin+ Vout+
ON/OFF
Q1
SEQ
MODULE
RoHS Compliant
EZ-SEQUENCETM
GE Data Sheet
PicoTLynxTM 3A: Non-Isolated DC-DC Power Modules
2.4Vdc –5.5Vdc input; 0.6Vdc to 3.63Vdc output; 3A Output Current
September 11, 2013 ©2013 General Electric Company. All rights reserved. Page 2
Absolute Maximum Ratings
Stresses in excess of the absolute maximum ratings can cause permanent damage to the device. These are absolute stress ratings
only, functional operation of the device is not implied at these or any other conditions in excess of those given in the operations
sections of the data sheet. Exposure to absolute maximum ratings for extended periods can adversely affect the device reliability.
Parameter Device Symbol Min Max Unit
Input Voltage All VIN -0.3 6 Vdc
Continuous
Sequencing Voltage APTH VSEQ -0.3 ViN, Max Vdc
Operating Ambient Temperature All TA -40 85 °C
(see Thermal Considerations section)
Storage Temperature All Tstg -55 125 °C
Electrical Specifications
Unless otherwise indicated, specifications apply over all operating input voltage, resistive load, and temperature conditions.
Parameter Device Symbol Min Typ Max Unit
Operating Input Voltage All VIN 2.4 ⎯ 5.5 Vdc
Maximum Input Current All IIN,max 3.5 Adc
(VIN=2.4V to 5.5V, IO=IO, max )
Input No Load Current VO,set = 0.6 Vdc IIN,No load 26 mA
(VIN = 5.0Vdc, IO = 0, module enabled) VO,set = 3.3Vdc IIN,No load 75 mA
Input Stand-by Current All IIN,stand-by 2.1 mA
(VIN = 5.0Vdc, module disabled)
Inrush Transient All I2t 1 A2s
Input Reflected Ripple Current, peak-to-peak
(5Hz to 20MHz, 1μH source impedance; VIN =0 to
5.5V, IO= IOmax ; See Test Configurations)
All 25 mAp-p
Input Ripple Rejection (120Hz) All 40 dB
CAUTION: This power module is not internally fused. An input line fuse must always be used.
This power module can be used in a wide variety of applications, ranging from simple standalone operation to an integrated part of
sophisticated power architecture. To preserve maximum flexibility, internal fusing is not included; however, to achieve maximum
safety and system protection, always use an input line fuse. The safety agencies require a fast-acting fuse with a maximum rating
of 5A (see Safety Considerations section). Based on the information provided in this data sheet on inrush energy and maximum dc
input current, the same type of fuse with a lower rating can be used. Refer to the fuse manufacturer’s data sheet for further
information.
GE Data Sheet
PicoTLynxTM 3A: Non-Isolated DC-DC Power Modules
2.4Vdc –5.5Vdc input; 0.6Vdc to 3.63Vdc output; 3A Output Current
September 11, 2013 ©2013 General Electric Company. All rights reserved. Page 3
Electrical Specifications (continued)
Parameter Device Symbol Min Typ Max Unit
Output Voltage Set-point (with 0.5% tolerance for external
resistor used to set output voltage) All VO, set -1.5 +1.5 % VO, set
Output Voltage All VO, set -3.0 ⎯ +3.0 % VO, set
(Over all operating input voltage, resistive load, and
temperature conditions until end of life)
Adjustment Range All VO 0.6 3.63 Vdc
Selected by an external resistor
Output Regulation (for VO ≥ 2.5Vdc)
Line (VIN=VIN, min to VIN, max) All
⎯ +0.4 % VO, set
Load (IO=IO, min to IO, max) All
⎯ 10 mV
Output Regulation (for VO < 2.5Vdc)
Line (VIN=VIN, min to VIN, max) All
⎯ 10 mV
Load (IO=IO, min to IO, max) All
⎯ 5 mV
Temperature (Tref=TA, min to TA, max) All
⎯ 0.4 % VO, set
Remote Sense Range All 0.5 V
Output Ripple and Noise on nominal output
(VIN=VIN, nom and IO=IO, min to IO, max Co = 0.1μF // 10 μF
ceramic ca
p
acitors)
Peak-to-Peak (5Hz to 20MHz bandwidth) All ⎯ 20 35 mVpk-pk
RMS 15 25 mVrms
External Capacitance1
Without the Tunable LoopTM
ESR ≥ 1 mΩ All CO, max 0 ⎯ 47 μF
With the Tunable LoopTM
ESR ≥ 0.15 mΩ All CO, max 0 ⎯ 1000 μF
ESR ≥ 10 mΩ All CO, max 0 ⎯ 3000 μF
Output Current All Io 0 3 Adc
Output Current Limit Inception (Hiccup Mode ) All IO, lim 200 % Io,max
Output Short-Circuit Current All IO, s/c 0.12 Adc
(VO≤250mV) ( Hiccup Mode )
Efficiency VO,set = 0.6Vdc η 81.2 %
VIN= 3.3Vdc, TA=25°C VO, set = 1.2Vdc η 89.4 %
IO=IO, max , VO= VO,set V
O,set = 1.8Vdc η 91.4 %
V
O,set = 2.5Vdc η 93.9 %
VIN= 5Vdc VO,set = 3.3Vdc η 94.4 %
Switching Frequency All fsw ⎯ 600 ⎯ kHz
Dynamic Load Response
(dIo/dt=10A/μs; VIN = 5V; Vout = 1.5V, TA=25°C)
Load Change from Io= 0% to 50% of Io,max; Co = 0
Peak Deviation All Vpk 90 mV
Settling Time (Vo<10% peak deviation) All ts 20 μs
Load Change from Io= 50% to 0% of Io,max: , Co = 0
Peak Deviation All Vpk 100 mV
Settling Time (Vo<10% peak deviation) All ts 20 μs
1 External capacitors may require using the new Tunable LoopTM feature to ensure that the module is stable as well as getting the
best transient response. See the Tunable LoopTM section for details.
GE Data Sheet
PicoTLynxTM 3A: Non-Isolated DC-DC Power Modules
2.4Vdc –5.5Vdc input; 0.6Vdc to 3.63Vdc output; 3A Output Current
September 11, 2013 ©2013 General Electric Company. All rights reserved. Page 4
General Specifications
Parameter Min Typ Max Unit
Calculated MTBF (IO=0.8IO, max, TA=40°C) Telcordia Issue 2 Method 1 Case
3 16,139,760 Hours
Weight ⎯ 1.55 (0.0546) ⎯ g (oz.)
Feature Specifications
Unless otherwise indicated, specifications apply over all operating input voltage, resistive load, and temperature conditions. See
Feature Descriptions for additional information.
Parameter Device Symbol Min Typ Max Units
On/Off Signal Interface
(VIN=VIN, min to VIN, max ; open collector or equivalent,
Signal referenced to GND)
Device is with suffix “4” – Positive Logic (See Ordering
Information)
Logic High (Module ON)
Input High Current All IIH ⎯ 10 µA
Input High Voltage All VIH 1.2 ⎯ VIN,max V
Logic Low (Module OFF)
Input Low Current All IIL ⎯ ⎯ 0.3 mA
Input Low Voltage All VIL -0.3 ⎯ 0.3 V
Device Code with no suffix – Negative Logic (See Ordering
Information)
(On/OFF pin is open collector/drain logic input with
external pull-up resistor; signal referenced to GND)
Logic High (Module OFF)
Input High Current All IIH — — 1 mA
Input High Voltage All VIH V
IN – 1.6 — VIN, max Vdc
Logic Low (Module ON)
Input low Current All IIL — — 0.2 mA
Input Low Voltage All VIL -0.2 — VIN – 1.6 Vdc
Turn-On Delay and Rise Times
(VIN=VIN, nom, IO=IO, max , VO to within ±1% of steady state)
Case 1: On/Off input is enabled and then input power is
applied (delay from instant at which VIN = VIN, min until Vo =
10% of Vo, set)
All Tdelay — 2 — msec
Case 2: Input power is applied for at least one second and
then the On/Off input is enabled (delay from instant at
which Von/Off is enabled until Vo = 10% of Vo, set)
All Tdelay — 2 — msec
Output voltage Rise time (time for Vo to rise from
10% of Vo, set to 90% of Vo, set) All Trise — 5 — msec
Output voltage overshoot (TA = 25oC 3.0 % VO, set
VIN= VIN, min to VIN, max,IO = IO, min to IO, max)
With or without maximum external capacitance
Over Temperature Protection All Tref 140 °C
(See Thermal Considerations section)
Sequencing Delay time
Delay from VIN, min to application of voltage on SEQ
pin APTH TsEQ-delay 10 msec
Tracking Accuracy (Power-Up: 2V/ms) APTH VSEQ –Vo 100 mV
(Power-Down: 2V/ms) APTH VSEQ –Vo 100 mV
(VIN, min to VIN, max; IO, min to IO, max VSEQ < Vo)
GE Data Sheet
PicoTLynxTM 3A: Non-Isolated DC-DC Power Modules
2.4Vdc –5.5Vdc input; 0.6Vdc to 3.63Vdc output; 3A Output Current
September 11, 2013 ©2013 General Electric Company. All rights reserved. Page 5
Feature Specifications (cont.)
Parameter Device Symbol Min Typ Max Units
Input Undervoltage Lockout
Turn-on Threshold All 2.2 Vdc
Turn-off Threshold All 1.75 Vdc
Hysteresis All
0.08 0.2 Vdc
GE Data Sheet
PicoTLynxTM 3A: Non-Isolated DC-DC Power Modules
2.4Vdc –5.5Vdc input; 0.6Vdc to 3.63Vdc output; 3A Output Current
September 11, 2013 ©2013 General Electric Company. All rights reserved. Page 6
Characteristic Curves
The following figures provide typical characteristics for the Pico TLynxTM 3A modules at 0.6Vo and at 25oC.
EFFICIENCY, η (%)
70
72
74
76
78
80
82
84
86
00.511.522.53
Vin=5.5V
Vin=2.4V
Vin=3.3V
OUTPUT CURRENT, Io (A)
0
0.5
1
1. 5
2
2.5
3
3.5
20 30 40 50 60 70 80 90
0 LFM
OUTPUT CURRENT, IO (A) AMBIENT TEMPERATURE, TA OC
Figure 1. Converter Efficiency versus Output Current. Figure 2. Derating Output Current versus Ambient
Temperature and Airflow.
OUTPUT VOLTAGE
VO (V) (20mV/div)
OUTPUT CURRENT, OUTPUT VOLTAGE
IO (A) (1Adiv) VO (V) (100mV/div)
TIME, t (1μs/div) TIME, t (20μs /div)
Figure 3. Typical output ripple and noise (VIN = 5V, Io = Io,max). Figure 4. Transient Response to Dynamic Load Change
from 0% to 50% to 0% with VIN=5V.
ON/OFF VOLTAGE OUTPUT VOLTAGE
VON/OFF (V) (2V/div) VO (V) (200mV/div)
INPUT VOLTAGE OUTPUT VOLTAGE
VIN (V) (2V/div) VO (V) (200mV/div)
TIME, t (1ms/div) TIME, t (1ms/div)
Figure 5. Typical Start-up Using On/Off Voltage (Io = Io,max). Figure 6. Typical Start-up Using Input Voltage (VIN = 5V, Io
= Io,max).
GE Data Sheet
PicoTLynxTM 3A: Non-Isolated DC-DC Power Modules
2.4Vdc –5.5Vdc input; 0.6Vdc to 3.63Vdc output; 3A Output Current
September 11, 2013 ©2013 General Electric Company. All rights reserved. Page 7
Characteristic Curves (continued)
The following figures provide typical characteristics for the Pico TLynxTM 3A modules at 1.2Vo and at 25oC.
EFFICIENCY, η (%)
70
75
80
85
90
95
0 0.5 1 1.5 2 2.5 3
Vin=5.5V
Vin=2.4V
Vin=3.3V
OUTPUT CURRENT, Io (A)
0
0.5
1
1. 5
2
2.5
3
3.5
20 30 40 50 60 70 80 90
0 LFM
OUTPUT CURRENT, IO (A) AMBIENT TEMPERATURE, TA OC
Figure 7. Converter Efficiency versus Output Current. Figure 8. Derating Output Current versus Ambient
Temperature and Airflow.
OUTPUT VOLTAGE
VO (V) (20mV/div)
OUTPUT
CURRENT
,
OUTPUT
VOLTAGE
IO (A) (1Adiv) VO (V) (100mV/div)
TIME, t (1μs/div) TIME, t (20μs /div)
Figure 9. Typical output ripple and noise (VIN = 5V, Io = Io,max). Figure 10. Transient Response to Dynamic Load Change
from 0% to 50% to 0% with VIN=5V.
ON/OFF VOLTAGE OUTPUT VOLTAGE
VON/OFF (V) (2V/div) VO (V) (500mV/div)
INPUT VOLTAGE OUTPUT VOLTAGE
VIN (V) (2V/div) VO (V) (500mV/div)
TIME, t (1ms/div) TIME, t (1ms/div)
Figure 11. Typical Start-up Using On/Off Voltage (Io = Io,max). Figure 12. Typical Start-up Using Input Voltage (VIN = 5V,
Io = Io,max).
GE Data Sheet
PicoTLynxTM 3A: Non-Isolated DC-DC Power Modules
2.4Vdc –5.5Vdc input; 0.6Vdc to 3.63Vdc output; 3A Output Current
September 11, 2013 ©2013 General Electric Company. All rights reserved. Page 8
Characteristic Curves (continued)
The following figures provide typical characteristics for the Pico TLynxTM 3A modules at 1.8Vo and at 25oC.
EFFICIENCY, η (%)
70
75
80
85
90
95
0 0.5 1 1.5 2 2.5 3
Vin=5.5V
Vin=2.4V
Vin=3.3V
OUTPUT CURRENT, Io (A)
0
0.5
1
1. 5
2
2.5
3
3.5
20 30 40 50 60 70 80 90
0 LFM
OUTPUT CURRENT, IO (A) AMBIENT TEMPERATURE, TA OC
Figure 13. Converter Efficiency versus Output Current. Figure 14. Derating Output Current versus Ambient
Temperature and Airflow.
OUTPUT VOLTAGE
VO (V) (20mV/div)
OUT
PUT
CURRENT
,
OUTPUT
VOLTAGE
IO (A) (1Adiv) VO (V) (200mV/div)
TIME, t (1μs/div) TIME, t (20μs /div)
Figure 15. Typical output ripple and noise (VIN = 5V, Io = Io,max). Figure 16. Transient Response to Dynamic Load Change
from 0% to 50% to 0% with VIN=5V.
ON/OFF VOLTAGE OUTPUT VOLTAGE
VON/OFF (V) (2V/div) VO (V) (500mV/div)
INPUT VOLTAGE OUTPUT VOLTAGE
VIN (V) (2V/div) VO (V) (1V/div)
TIME, t (1ms/div) TIME, t (1ms/div)
Figure 17. Typical Start-up Using On/Off Voltage (Io = Io,max). Figure 18. Typical Start-up Using Input Voltage (VIN = 5V,
Io = Io,max).
GE Data Sheet
PicoTLynxTM 3A: Non-Isolated DC-DC Power Modules
2.4Vdc –5.5Vdc input; 0.6Vdc to 3.63Vdc output; 3A Output Current
September 11, 2013 ©2013 General Electric Company. All rights reserved. Page 9
Characteristic Curves (continued)
The following figures provide typical characteristics for the Pico TLynxTM 3A modules at 2.5Vo and at 25oC.
EFFICIENCY, η (%)
70
75
80
85
90
95
100
0 0.5 1 1.5 2 2.5 3
Vin=5.5V
Vin=3V
Vin=3.3V
OUTPUT CURRENT, Io (A)
0
0.5
1
1. 5
2
2.5
3
3.5
20 30 40 50 60 70 80 90
0 LFM
OUTPUT CURRENT, IO (A) AMBIENT TEMPERATURE, TA OC
Figure 19. Converter Efficiency versus Output Current. Figure 20. Derating Output Current versus Ambient
Temperature and Airflow.
OUTPUT VOLTAGE
VO (V) (20mV/div)
OUTPUT
CURRENT
,
OUTPUT
VOLTAGE
IO (A) (1Adiv) VO (V) (200mV/div)
TIME, t (1μs/div) TIME, t (20μs /div)
Figure 21. Typical output ripple and noise (VIN = 5V, Io = Io,max). Figure 22. Transient Response to Dynamic Load Change
from 0% to 50% to 0% with VIN=5V.
ON/OFF VOLTAGE OUTPUT VOLTAGE
VON/OFF (V) (5V/div) VO (V) (1V/div)
INPUT VOLTAGE OUTPUT VOLTAGE
VIN (V) (2V/div) VO (V) (1V/div)
TIME, t (1ms/div) TIME, t (1ms/div)
Figure 23. Typical Start-up Using On/Off Voltage (Io = Io,max). Figure 24. Typical Start-up Using Input Voltage (VIN = 5V,
Io = Io,max).
GE Data Sheet
PicoTLynxTM 3A: Non-Isolated DC-DC Power Modules
2.4Vdc –5.5Vdc input; 0.6Vdc to 3.63Vdc output; 3A Output Current
September 11, 2013 ©2013 General Electric Company. All rights reserved. Page 10
Characteristic Curves (continued)
The following figures provide typical characteristics for the Pico TLynxTM 3A modules at 3.3Vo and at 25oC.
EFFICIENCY, η (%)
70
75
80
85
90
95
100
0 0.5 1 1.5 2 2.5 3
Vin=5.5V
Vin=4V
Vin=5V
OUTPUT CURRENT, Io (A)
0
0.5
1
1. 5
2
2.5
3
3.5
20 30 40 50 60 70 80 90
0 LFM
OUTPUT CURRENT, IO (A) AMBIENT TEMPERATURE, TA OC
Figure 25. Converter Efficiency versus Output Current. Figure 26. Derating Output Current versus Ambient
Temperature and Airflow.
OUTPUT VOLTAGE
VO (V) (20mV/div)
OUTPUT CURRENT, OUTPUT VOLTAGE
IO (A) (1Adiv) VO (V) (200mV/div)
TIME, t (1μs/div) TIME, t (20μs /div)
Figure 27. Typical output ripple and noise (VIN = 5V, Io = Io,max). Figure 28. Transient Response to Dynamic Load Change
from 0% 50% to 0% with VIN=5V.
ON/OFF VOLTAGE OUTPUT VOLTAGE
VON/OFF (V) (2V/div) VO (V) (1V/div)
INPUT VOLTAGE OUTPUT VOLTAGE
VIN (V) (2V/div) VO (V) (1V/div)
TIME, t (1ms/div) TIME, t (1ms/div)
Figure 29. Typical Start-up Using On/Off Voltage (Io = Io,max). Figure 30. Typical Start-up Using Input Voltage (VIN = 5V,
Io = Io,max).
GE Data Sheet
PicoTLynxTM 3A: Non-Isolated DC-DC Power Modules
2.4Vdc –5.5Vdc input; 0.6Vdc to 3.63Vdc output; 3A Output Current
September 11, 2013 ©2013 General Electric Company. All rights reserved. Page 11
Test Configurations
TO OSCILLOSCOPE CURRENT PROBE
LTEST
1μH
BATTERY
CS 1000μF
Electrolytic
E.S.R.<0.1Ω
@ 20°C 100kHz
2x100μF
Tantalum
VIN(+)
COM
NOTE: Measure input reflected ripple current with a simulated
source inductance (LTEST) of 1μH. Capacitor CS offsets
possible battery impedance. Measure current as shown
above.
CIN
Figure 31. Input Reflected Ripple Current Test Setup.
NOTE: All voltage measurements to be taken at the module
terminals, as shown above. If sockets are used then
Kelvin connections are required at the module terminals
to avoid measurement errors due to socket contact
resistance.
Vo+
COM
0.1u F
RESISTIVE
LOAD
SCOPE U SING
BNC SOCK ET
COPPER STRIP
GROUND PLANE
10uF
Figure 32. Output Ripple and Noise Test Setup.
VO
COM
VIN(+)
COM
RLOAD
Rcontac t Rdistribution
Rcontac t Rdistribution
Rcontact
Rcontact
Rdistribution
Rdistribution
VIN VO
NOTE: All voltage measurements to be taken at the module
terminals, as shown above. If sockets are used then
Kelvin connections are required at the module terminals
to avoid measurement errors due to socket contact
resistance.
Figure 33. Output Voltage and Efficiency Test Setup.
η =
VO. IO
VIN. IIN
x 100 %
Efficiency
Design Considerations
Input Filtering
The Pico TLynxTM 3A module should be connected to a low ac-
impedance source. A highly inductive source can affect the
stability of the module. An input capacitance must be placed
directly adjacent to the input pin of the module, to minimize
input ripple voltage and ensure module stability.
To minimize input voltage ripple, low-ESR ceramic capacitors
are recommended at the input of the module. Figure 34 shows
the input ripple voltage for various output voltages at 3A of
load current with 1x22 µF or 2x22 µF ceramic capacitors and
an input of 5V. Figure 35 shows data for the 3.3Vin case, with
1x22µF or 2x22µF of ceramic capacitors at the input.
Input Ripple Voltage (mVp-p)
0
10
20
30
40
50
60
0.5 1 1.5 2 2.5 3 3.5
1x22uF
2x22uF
Output Voltage (Vdc)
Figure 34. Input ripple voltage for various output voltages
with 1x22 µF or 2x22 µF ceramic capacitors at the input (3A
load). Input voltage is 5V.
Input Ripple Voltage (mVp-p)
0
10
20
30
40
50
60
0.5 1 1.5 2 2.5 3
1x22uF
2x22uF
Output Voltage (Vdc)
Figure 35. Input ripple voltage in mV, p-p for various output
voltages with 1x22 µF or 2x22 µF ceramic capacitors at the
input (3A load). Input voltage is 3.3V.
GE Data Sheet
PicoTLynxTM 3A: Non-Isolated DC-DC Power Modules
2.4Vdc –5.5Vdc input; 0.6Vdc to 3.63Vdc output; 3A Output Current
September 11, 2013 ©2013 General Electric Company. All rights reserved. Page 12
Output Filtering
The Pico TLynxTM 3A modules are designed for low output
ripple voltage and will meet the maximum output ripple
specification with 0.1 µF ceramic and 10 µF ceramic
capacitors at the output of the module. However, additional
output filtering may be required by the system designer for a
number of reasons. First, there may be a need to further
reduce the output ripple and noise of the module. Second,
the dynamic response characteristics may need to be
customized to a particular load step change.
To reduce the output ripple and improve the dynamic
response to a step load change, additional capacitance at
the output can be used. Low ESR ceramic and polymer
capacitors are recommended to improve the dynamic
response of the module. Figure 36 provides output ripple
information for different external capacitance values at
various Vo and for load currents of 3A while maintaining an
input voltage of 5V. Fig 37 shows the performance with a
3.3V input. For stable operation of the module, limit the
capacitance to less than the maximum output capacitance
as specified in the electrical specification table. Optimal
performance of the module can be achieved by using the
Tunable Loop feature described later in this data sheet.
0
5
10
15
20
25
30
0.5 1 1.5 2 2.5 3 3.5
Output Voltage(Volts)
Ripple(mVp-p)
1x10uF External Cap
1x47uF External cap
2x47uF External Cap
4x47uF external Cap
Figure 36. Output ripple voltage for various output
voltages with external 1x10 µF, 1x47 µF, 2x47 µF or 4x47 µF
ceramic capacitors at the output (3A load). Input voltage is
5V.
0
5
10
15
20
0.511.522.53
Output Voltage(Volts)
Ripple(mVp-p)
1x10uF External Cap
1x47uF External cap
2x47uF External Cap
4x47uF external Cap
Figure 37. Output ripple voltage for various output voltages
with external 1x10 µF, 1x47 µF, 2x47 µF or 4x47 µF ceramic
capacitors at the output (3A load). Input voltage is 3.3V.
Safety Considerations
For safety agency approval the power module must be
installed in compliance with the spacing and separation
requirements of the end-use safety agency standards, i.e., UL
60950-1, CSA C22.2 No. 60950-1-03, and VDE 0850:2001-12
(EN60950-1) Licensed.
For the converter output to be considered meeting the
requirements of safety extra-low voltage (SELV), the input must
meet SELV requirements. The power module has extra-low
voltage (ELV) outputs when all inputs are ELV.
The input to these units is to be provided with a fast-acting
fuse with a maximum rating of 5A in the positive input lead.
Feature Descriptions
Remote On/Off
The Pico TLynxTM 3A modules feature an On/Off pin for remote
On/Off operation. Two On/Off logic options are available. In
the Positive Logic On/Off option, (device code suffix “4”- see
Ordering Information), the module turns ON during a logic
High on the On/Off pin and turns OFF during a logic Low. With
the Negative Logic On/Off option, (no device code suffix, see
Ordering Information), the module turns OFF during logic High
and ON during logic Low. The On/Off signal is always
referenced to ground. For either On/Off logic option, leaving
the On/Off pin disconnected will turn the module ON when
input voltage is present.
For positive logic modules, the circuit configuration for using
the On/Off pin is shown in Figure 38. When the external
transistor Q1 is in the OFF state, Q2 is ON, the internal PWM
Enable signal is pulled low and the module is ON. When
transistor Q1 is turned ON, the On/Off pin is pulled low, Q2 is
turned off and the internal PWM Enable signal is pulled high
through the 100K internal pull-up resistor and the module is
OFF.
GE Data Sheet
PicoTLynxTM 3A: Non-Isolated DC-DC Power Modules
2.4Vdc –5.5Vdc input; 0.6Vdc to 3.63Vdc output; 3A Output Current
September 11, 2013 ©2013 General Electric Company. All rights reserved. Page 13
Figure 38. Circuit configuration for using positive On/Off
logic.
For negative logic On/Off modules, the circuit configuration is
shown in Fig. 39. The On/Off pin should be pulled high with
an external pull-up resistor (suggested value for the 2.4V to
5.5Vin range is 3.6Kohms). When transistor Q1 is in the OFF
state, the On/Off pin is pulled high and the module is OFF.
The On/Off threshold for logic High on the On/Off pin
depends on the input voltage and its minimum value is VIN –
1.6V. To turn the module ON, Q1 is turned ON pulling the
On/Off pin low.
100K
Q1
GND
PWM Enable
ON/OFF
VIN+
ON/OFF
_
+
V
I
MODULE
Rpullup
ON/OFF
2.05K
20K
Figure 39. Circuit configuration for using negative On/Off
logic.
Overcurrent Protection
To provide protection in a fault (output overload) condition,
the unit is equipped with internal current-limiting circuitry
and can endure current limiting continuously. At the point of
current-limit inception, the unit enters hiccup mode. The unit
operates normally once the output current is brought back
into its specified range.
Overtemperature Protection
To provide protection in a fault condition, the unit is equipped
with a thermal shutdown circuit. The unit will shutdown if the
overtemperature threshold of 140oC is exceeded at the
thermal reference point Tref . The thermal shutdown is not
intended as a guarantee that the unit will survive
temperatures beyond its rating. Once the unit goes into
thermal shutdown it will then wait to cool before attempting to
restart.
Input Undervoltage Lockout
At input voltages below the input undervoltage lockout limit,
the module operation is disabled. The module will begin to
operate at an input voltage above the undervoltage lockout
turn-on threshold.
Output Voltage Programming
The output voltage of the Pico TLynxTM 3A modules can be
programmed to any voltage from 0.6Vdc to 3.63Vdc by
connecting a resistor between the Trim and GND pins of the
module. Certain restrictions apply on the output voltage set
point depending on the input voltage. These are shown in the
Output Voltage vs. Input Voltage Set Point Area plot in Fig. 40.
The Upper Limit curve shows that the entire output voltage
range is available with the maximum input voltage of 5.5V. The
Lower Limit curve shows that for output voltages of 1.8V and
higher, the input voltage needs to be larger than the minimum
of 2.4V.
0
1
2
3
4
5
6
0.5 1 1.5 2 2.5 3 3.5 4
Output Voltage (V)
Input Voltage (v)
Upper Limit
Lower Limit
Figure 40. Output Voltage vs. Input Voltage Set Point Area
plot showing limits where the output voltage can be set for
different input voltages.
Without an external resistor between Trim and GND pins, the
output of the module will be 0.6Vdc. To calculate the value of
the trim resistor, Rtrim for a desired output voltage, use the
following equation:
()
Ω
−
=k
Vo
Rtrim
6.0
2.1
Rtrim is the external resistor in kΩ
Vo is the desired output voltage.
Table 1 provides Rtrim values required for some common
output voltages.
Table 1
VO, set (V) Rtrim (KΩ)
0.6 Open
1.0 3.0
100K
Q1
GND
PWM Enable
ON/OFF
VIN+
ON/OFF
_
+
I
V
MODULE
ON/OFF
20K
Q2
20K
GE Data Sheet
PicoTLynxTM 3A: Non-Isolated DC-DC Power Modules
2.4Vdc –5.5Vdc input; 0.6Vdc to 3.63Vdc output; 3A Output Current
September 11, 2013 ©2013 General Electric Company. All rights reserved. Page 14
1.2 2.0
1.5 1.333
1.8 1.0
2.5 0.632
3.3 0.444
By using a ±0.5% tolerance trim resistor with a TC of
±25ppm, a set point tolerance of ±1.5% can be achieved as
specified in the electrical specification. The POL
Programming Tool available at www.lineagepower.com
under the Design Tools section, helps determine the required
trim resistor needed for a specific output voltage.
VO+
TRIM
GND
Rtrim
LOAD
VIN+
ON/OFF
SENSE
Fi
gure 41. Circuit configuration for programming output
voltage using an external resistor.
Remote Sense
The Pico TLynxTM 3A modules have a Remote Sense feature
to minimize the effects of distribution losses by regulating
the voltage at the SENSE pin. The voltage between the
SENSE pin and VOUT pin must not exceed 0.5V. Note that the
output voltage of the module cannot exceed the specified
maximum value. This includes the voltage drop between the
SENSE and Vout pins. When the Remote Sense feature is not
being used, connect the SENSE pin to the VOUT pin.
Voltage Margining
Output voltage margining can be implemented in the Pico
TLynxTM 3A modules by connecting a resistor, Rmargin-up, from
the Trim pin to the ground pin for margining-up the output
voltage and by connecting a resistor, Rmargin-down, from the
Trim pin to output pin for margining-down. Figure 42 shows
the circuit configuration for output voltage margining. The
POL Programming Tool, available at www.lineagepower.com
under the Design Tools section, also calculates the values of
Rmargin-up and Rmargin-down for a specific output voltage and %
margin. Please consult your local GE technical
representative for additional details.
Vo
MODULE
GND
Trim
Q1
Rtrim
Rmargin-up
Q2
Rmargin-down
Figure 42. Circuit Configuration for margining Output
voltage
Monotonic Start-up and Shutdown
The Pico TLynxTM 3A modules have monotonic start-up and
shutdown behavior for any combination of rated input voltage,
output current and operating temperature range.
Startup into Pre-biased Output
The 5.5V Pico TLynxTM 6A modules can start into a prebiased
output as long as the prebias voltage is 0.5V less than the set
output voltage. Note that prebias operation is not supported
when output voltage sequencing is used.
Output Voltage Sequencing
The Pico TLynxTM modules include a sequencing feature, EZ-
SEQUENCE that enables users to implement various types of
output voltage sequencing in their applications. This is
accomplished via an additional sequencing pin. When not
using the sequencing feature, either tie the SEQ pin to VIN or
leave it unconnected.
When an analog voltage is applied to the SEQ pin, the output
voltage tracks this voltage until the output reaches the set-
point voltage. The final value of the SEQ voltage must be set
higher than the set-point voltage of the module. The output
voltage follows the voltage on the SEQ pin on a one-to-one
volt basis. By connecting the SEQ pins of multiple modules
together, all modules can track their output voltages to the
voltage applied on the SEQ pin.
For proper voltage sequencing, first, input voltage is applied to
the module. The On/Off pin of the module is left unconnected
(or tied to GND for negative logic modules or tied to VIN for
positive logic modules) so that the module is ON by default.
After applying input voltage to the module, a minimum
10msec delay is required before applying voltage on the SEQ
pin. This delay gives the module enough time to complete its
internal power-up soft-start cycle. During the delay time, the
SEQ pin should be held close to ground (nominally 50mV ± 20
mV). This is required to keep the internal op-amp out of
GE Data Sheet
PicoTLynxTM 3A: Non-Isolated DC-DC Power Modules
2.4Vdc –5.5Vdc input; 0.6Vdc to 3.63Vdc output; 3A Output Current
September 11, 2013 ©2013 General Electric Company. All rights reserved. Page 15
saturation thus preventing output overshoot during the start
of the sequencing ramp. By selecting resistor R1 (see fig. 43)
according to the following equation
05.0
24950
1
−
=
IN
V
Rohms,
the voltage at the sequencing pin will be 50mV when the
sequencing signal is at zero.
R1
GND
VIN+
SEQ
+
-
OUT
10K
499K
MODULE
Figure 43. Circuit showing connection of the sequencing
signal to the SEQ pin.
After the 10msec delay, an analog voltage is applied to the
SEQ pin and the output voltage of the module will track this
voltage on a one-to-one volt bases until the output reaches
the set-point voltage. To initiate simultaneous shutdown of
the modules, the SEQ pin voltage is lowered in a controlled
manner. The output voltage of the modules tracks the
voltages below their set-point voltages on a one-to-one
basis. A valid input voltage must be maintained until the
tracking and output voltages reach ground potential.
When using the EZ-SEQUENCETM feature to control start-up
of the module, pre-bias immunity during start-up is disabled.
The pre-bias immunity feature of the module relies on the
module being in the diode-mode during start-up. When
using the EZ-SEQUENCETM feature, modules goes through an
internal set-up time of 10msec, and will be in synchronous
rectification mode when the voltage at the SEQ pin is applied.
This will result in the module sinking current if a pre-bias
voltage is present at the output of the module. When pre-
bias immunity during start-up is required, the EZ-
SEQUENCETM feature must be disabled. For additional
guidelines on using the EZ-SEQUENCETM feature please refer
to Application Note AN04-008 “Application Guidelines for
Non-Isolated Converters: Guidelines for Sequencing of
Multiple Modules”, or contact the GE technical representative
for additional information.
Tunable Loop
The 5V Pico TLynxTM 3A modules have a new feature that
optimizes transient response of the module called Tunable
LoopTM.
External capacitors are usually added to the output of the
module for two reasons: to reduce output ripple and noise
(see Figures 36 and 37) and to reduce output voltage
deviations from the steady-state value in the presence of
dynamic load current changes. Adding external capacitance
however affects the voltage control loop of the module,
typically causing the loop to slow down with sluggish
response. Larger values of external capacitance could also
cause the module to become unstable.
The Tunable LoopTM allows the user to externally adjust the
voltage control loop to match the filter network connected to
the output of the module. The Tunable Loop is implemented
by connecting a series R-C between the SENSE and TRIM pins
of the module, as shown in Fig. 44. This R-C allows the user to
externally adjust the voltage loop feedback compensation of
the module.
Figure. 44. Circuit diagram showing connection of RTUME
and CTUNE to tune the control loop of the module.
Recommended values of RTUNE and CTUNE for different output
capacitor combinations are given in Tables 2, 3, 4 and 5.
Tables 2 and 4 show the recommended values of RTUNE and
CTUNE for different values of ceramic output capacitors up to
470uF that might be needed for an application to meet
output ripple and noise requirements for 5Vin and 3.3Vin
respectively. Selecting RTUNE and CTUNE according to Table 2
will ensure stable operation of the module.
In applications with tight output voltage limits in the presence
of dynamic current loading, additional output capacitance
will be required. Tables 3 and 5 list recommended values of
RTUNE and CTUNE in order to meet 2% output voltage deviation
limits for some common output voltages in the presence of a
1.5A to 3A step change (50% of full load), with an input
voltage of 5Vin and 3.3Vin respectively
Please contact your GE technical representative to obtain
more details of this feature as well as for guidelines on how to
select the right value of external R-C to tune the module for
best transient performance and stable operation for other
output capacitance values or input voltages other than 3.3 or
5V.
MODULE
VOUT
SENSE
TRIM
GND
RTUNE
CTUNE
RTrim
C O
GE Data Sheet
PicoTLynxTM 3A: Non-Isolated DC-DC Power Modules
2.4Vdc –5.5Vdc input; 0.6Vdc to 3.63Vdc output; 3A Output Current
September 11, 2013 ©2013 General Electric Company. All rights reserved. Page 16
Table 2. General recommended values of of RTUNE and CTUNE
for Vin=5V and various external ceramic capacitor
combinations.
Co 1x47μF 2x47μF 4x47μF 6x47μF 10x47μF
RTUNE 33 33 33 33 33
CTUNE 6800pF 15nF 33nF 47nF 56nF
Table 3. Recommended values of RTUNE and CTUNE to obtain
transient deviation of ≤2% of Vout for a 1.5A step load with
Vin=5V.
Vo 3.3V 2.5V 1.8V 1.2V 0.6V
Co 1 x 47μF 2 x 47μF 2 x 47μF 4 x 47μF
2 x 47μF
+330μF
Polymer
RTUNE 33 33 33 33 33
CTUNE 6800pF 15nF 15nF 33nF 82nF
ΔV 59mV 35mV 35mV 21mV 12mV
Table 4. General recommended values of of RTUNE and CTUNE
for Vin=3.3V and various external ceramic capacitor
combinations.
Co 1x47μF 2x47μF 4x47μF 6x47μF 10x47μF
RTUNE 33 33 33 33 33
CTUNE 15nF 27nF 47nF 56nF 68nF
Table 5. Recommended values of RTUNE and CTUNE to obtain
transient deviation of ≤2% of Vout for a 1.5A step load with
Vin=3.3V.
Vo 2.5V 1.8V 1.2V 0.6V
Co 2 x 47μF 2 x 47μF 4 x 47μF 4 x 47μF
+330μF Polymer
RTUNE 33 33 33 33
CTUNE 22nF 27nF 47nF 150nF
ΔV 46mV 32mV 24mV 12mV
GE Data Sheet
PicoTLynxTM 3A: Non-Isolated DC-DC Power Modules
2.4Vdc –5.5Vdc input; 0.6Vdc to 3.63Vdc output; 3A Output Current
September 11, 2013 ©2013 General Electric Company. All rights reserved. Page 17
Thermal Considerations
Power modules operate in a variety of thermal environments;
however, sufficient cooling should always be provided to help
ensure reliable operation.
Considerations include ambient temperature, airflow, module
power dissipation, and the need for increased reliability. A
reduction in the operating temperature of the module will
result in an increase in reliability. The thermal data presented
here is based on physical measurements taken in a wind
tunnel. The test set-up is shown in Figure 45. The preferred
airflow direction for the module is shown in Figure 46.
A
ir
flow
x
Power Module
W
ind Tunnel
PWBs
12.7_
(0.50)
76.2_
(3.0)
Probe Location
for measuring
airflow and
ambient
temperature
25.4_
(1.0)
Figure 45. Thermal Test Setup.
The thermal reference points, Tref used in the specifications
are shown in Figure 46. For reliable operation the
temperatures at these points should not exceed 125oC. The
output power of the module should not exceed the rated
power of the module (Vo,set x Io,max).
Please refer to the Application Note “Thermal Characterization
Process For Open-Frame Board-Mounted Power Modules” for
a detailed discussion of thermal aspects including maximum
device temperatures.
Figure 46. Preferred airflow direction and location of hot-
spot of the module (Tref).
GE Data Sheet
PicoTLynxTM 3A: Non-Isolated DC-DC Power Modules
2.4Vdc –5.5Vdc input; 0.6Vdc to 3.63Vdc output; 3A Output Current
September 11, 2013 ©2013 General Electric Company. All rights reserved. Page 18
Shock and Vibration
The ruggedized (-D version) of the modules are designed to withstand elevated levels of shock and vibration to be able to operate in
harsh environments. The ruggedized modules have been successfully tested to the following conditions:
Non operating random vibration:
Random vibration tests conducted at 25C, 10 to 2000Hz, for 30 minutes each level, starting from 30Grms (Z axis) and up to 50Grms
(Z axis). The units were then subjected to two more tests of 50Grms at 30 minutes each for a total of 90 minutes.
Operating shock to 40G per Mil Std. 810F, Method 516.4 Procedure I:
The modules were tested in opposing directions along each of three orthogonal axes, with waveform and amplitude of the shock
impulse characteristics as follows:
All shocks were half sine pulses, 11 milliseconds (ms) in duration in all 3 axes.
Units were tested to the Functional Shock Test of MIL-STD-810, Method 516.4, Procedure I - Figure 516.4-4. A shock magnitude of
40G was utilized. The operational units were subjected to three shocks in each direction along three axes for a total of eighteen
shocks.
Operating vibration per Mil Std 810F, Method 514.5 Procedure I:
The ruggedized (-D version) modules are designed and tested to vibration levels as outlined in MIL-STD-810F, Method 514.5, and
Procedure 1, using the Power Spectral Density (PSD) profiles as shown in Table 6 and Table 7 for all axes. Full compliance with
performance specifications was required during the performance test. No damage was allowed to the module and full compliance
to performance specifications was required when the endurance environment was removed. The module was tested per MIL-STD-
810, Method 514.5, Procedure I, for functional (performance) and endurance random vibration using the performance and
endurance levels shown in Table 6 and Table 7 for all axes. The performance test has been split, with one half accomplished before
the endurance test and one half after the endurance test (in each axis). The duration of the performance test was at least 16
minutes total per axis and at least 120 minutes total per axis for the endurance test. The endurance test period was 2 hours
minimum per axis.
Table 6: Performance Vibration Qualification - All Axes
Frequency (Hz) PSD Level
(G2/Hz) Frequency (Hz) PSD Level
(G2/Hz) Frequency (Hz) PSD Level
(G2/Hz)
10 1.14E-03 170 2.54E-03 690 1.03E-03
30 5.96E-03 230 3.70E-03 800 7.29E-03
40 9.53E-04 290 7.99E-04 890 1.00E-03
50 2.08E-03 340 1.12E-02 1070 2.67E-03
90 2.08E-03 370 1.12E-02 1240 1.08E-03
110 7.05E-04 430 8.84E-04 1550 2.54E-03
130 5.00E-03 490 1.54E-03 1780 2.88E-03
140 8.20E-04 560 5.62E-04 2000 5.62E-04
Table 7: Endurance Vibration Qualification - All Axes
Frequency (Hz) PSD Level
(G2/Hz) Frequency (Hz) PSD Level
(G2/Hz) Frequency (Hz) PSD Level
(G2/Hz)
10 0.00803 170 0.01795 690 0.00727
30 0.04216 230 0.02616 800 0.05155
40 0.00674 290 0.00565 890 0.00709
50 0.01468 340 0.07901 1070 0.01887
90 0.01468 370 0.07901 1240 0.00764
110 0.00498 430 0.00625 1550 0.01795
130 0.03536 490 0.01086 1780 0.02035
140 0.0058 560 0.00398 2000 0.00398
GE Data Sheet
PicoTLynxTM 3A: Non-Isolated DC-DC Power Modules
2.4Vdc –5.5Vdc input; 0.6Vdc to 3.63Vdc output; 3A Output Current
September 11, 2013 ©2013 General Electric Company. All rights reserved. Page 19
Example Application Circuit
Requirements:
Vin: 3.3V
Vout: 1.8V
Iout: 2.25A max., worst case load transient is from 1.5A to 2.25A
ΔVout: 1.5% of Vout (27mV) for worst case load transient
Vin, ripple 1.5% of Vin (50mV, p-p)
MODULE
VOUT
SENSE
GND
TRIM
RTUNE
CTUNE
RTrim
VIN
CO1
+
CI2 CI1
Vin+ Vout+
ON/OFF
Q3
CI1 22μF/6.3V ceramic capacitor
CI2 47μF/6.3V bulk electrolytic
CO1 2 x 47μF/6.3V ceramic capacitor (e.g. Murata GRM31CR60J476ME19)
CTune 27nF ceramic capacitor (can be 1206, 0805 or 0603 size)
RTune 33 ohms SMT resistor (can be 1206, 0805 or 0603 size)
RTrim 1kΩ SMT resistor (can be 1206, 0805 or 0603 size, recommended tolerance of 0.1%)
GE Data Sheet
PicoTLynxTM 3A: Non-Isolated DC-DC Power Modules
2.4Vdc –5.5Vdc input; 0.6Vdc to 3.63Vdc output; 3A Output Current
September 11, 2013 ©2013 General Electric Company. All rights reserved. Page 20
Mechanical Outline
Dimensions are in millimeters and (inches).
Tolerances: x.x mm ± 0.5 mm (x.xx in. ± 0.02 in.) [unless otherwise indicated]
x.xx mm ± 0.25 mm (x.xxx in ± 0.010 in.)
PIN FUNCTION
1 ON/OFF
2 VIN
3 GND
4 VOUT
5 SENSE
6 TRIM
7 GND
8 NC
9 SEQ
10 NC
PIN 7 PIN 8
PIN 10
GE Data Sheet
PicoTLynxTM 3A: Non-Isolated DC-DC Power Modules
2.4Vdc –5.5Vdc input; 0.6Vdc to 3.63Vdc output; 3A Output Current
September 11, 2013 ©2013 General Electric Company. All rights reserved. Page 21
Recommended Pad Layout
Dimensions are in millimeters and (inches).
Tolerances: x.x mm ± 0.5 mm (x.xx in. ± 0.02 in.) [unless otherwise indicated]
x.xx mm ± 0.25 mm (x.xxx in ± 0.010 in.)
PIN FUNCTION
1 ON/OFF
2 VIN
3 GND
4 VOUT
5 SENSE
6 TRIM
7 GND
8 NC
9 SEQ
10 NC
PIN 8 PIN 7
PIN 10
GE Data Sheet
PicoTLynxTM 3A: Non-Isolated DC-DC Power Modules
2.4Vdc –5.5Vdc input; 0.6Vdc to 3.63Vdc output; 3A Output Current
September 11, 2013 ©2013 General Electric Company. All rights reserved. Page 22
Packaging Details
The Pico TLynxTM 3A modules are supplied in tape & reel as standard. Modules are shipped in quantities of 400 modules per reel.
All Dimensions are in millimeters and (in inches).
Reel Dimensions:
Outside Dimensions: 330.2 mm (13.00)
Inside Dimensions: 177.8 mm (7.00”)
Tape Width: 24.00 mm (0.945”)
GE Data Sheet
PicoTLynxTM 3A: Non-Isolated DC-DC Power Modules
2.4Vdc –5.5Vdc input; 0.6Vdc to 3.63Vdc output; 3A Output Current
September 11, 2013 ©2013 General Electric Company. All rights reserved. Page 23
Surface Mount Information
Pick and Place
The Pico TLynxTM 3A modules use an open frame construction
and are designed for a fully automated assembly process. The
modules are fitted with a label designed to provide a large
surface area for pick and place operations. The label meets all
the requirements for surface mount processing, as well as
safety standards, and is able to withstand reflow temperatures
of up to 300oC. The label also carries product information such
as product code, serial number and the location of manufacture.
Nozzle Recommendations
The module weight has been kept to a minimum by using open
frame construction. Variables such as nozzle size, tip style,
vacuum pressure and placement speed should be considered to
optimize this process. The minimum recommended inside
nozzle diameter for reliable operation is 3mm. The maximum
nozzle outer diameter, which will safely fit within the allowable
component spacing, is 7 mm.
Bottom Side / First Side Assembly
This module is not recommended for assembly on the bottom
side of a customer board. If such an assembly is attempted,
components may fall off the module during the second reflow
process. If assembly on the bottom side is planned, please
contact GE for special manufacturing process instructions.
Only ruggedized (-D version) modules with additional epoxy will
work with a customer’s first side assembly. For other versions,
first side assembly should be avoided
Lead Free Soldering
The Pico TLynxTM 3A modules are lead-free (Pb-free) and RoHS
compliant and fully compatible in a Pb-free soldering process.
Failure to observe the instructions below may result in the
failure of or cause damage to the modules and can adversely
affect long-term reliability.
Pb-free Reflow Profile
Power Systems will comply with J-STD-020 Rev. C
(Moisture/Reflow Sensitivity Classification for Nonhermetic Solid
State Surface Mount Devices) for both Pb-free solder profiles
and MSL classification procedures. This standard provides a
recommended forced-air-convection reflow profile based on the
volume and thickness of the package (table 4-2). The suggested
Pb-free solder paste is Sn/Ag/Cu (SAC). The recommended linear
reflow profile using Sn/Ag/Cu solder is shown in Fig. 47.
Soldering outside of the recommended profile requires testing to
verify results and performance. For questions regarding Land
grid array(LGA) soldering, solder volume; please contact GE for
special manufacturing process instructions
MSL Rating
The Pico TLynxTM 3A modules have a MSL rating of 2a.
Storage and Handling
The recommended storage environment and handling
procedures for moisture-sensitive surface mount
packages is detailed in J-STD-033 Rev. A (Handling,
Packing, Shipping and Use of Moisture/Reflow Sensitive
Surface Mount Devices). Moisture barrier bags (MBB) with
desiccant are required for MSL ratings of 2 or greater.
These sealed packages should not be broken until time of
use. Once the original package is broken, the floor life of
the product at conditions of ≤ 30°C and 60% relative
humidity varies according to the MSL rating (see J-STD-
033A). The shelf life for dry packed SMT packages will be a
minimum of 12 months from the bag seal date, when
stored at the following conditions: < 40° C, < 90% relative
humidity.
Per J-STD-020 Rev. C
0
50
100
150
200
250
300
Reflow Time (Seconds)
Reflow Temp (°C)
Heating Zone
1°C/Second
Peak Temp 260°C
* Min. Time Above 235°C
15 Seconds
*Time Above 217°C
60 Seconds
Cooling
Zone
Fi
gure 47. Recommended linear reflow profile using
Sn/Ag/Cu solder.
Post Solder Cleaning and Drying Considerations
Post solder cleaning is usually the final circuit-board
assembly process prior to electrical board testing. The
result of inadequate cleaning and drying can affect both
the reliability of a power module and the testability of the
finished circuit-board assembly. For guidance on
appropriate soldering, cleaning and drying procedures,
refer to Board Mounted Power Modules: Soldering and
Cleaning Application Note (AN04-001).
GE Data Sheet
PicoTLynxTM 3A: Non-Isolated DC-DC Power Modules
2.4Vdc –5.5Vdc input; 0.6Vdc to 3.63Vdc output; 3A Output Current
Contact Us
For more information, call us at
USA/Canada:
+1 888 546 3243, or +1 972 244 9288
Asia-Pacific:
+86.021.54279977*808
Europe, Middle-East and Africa:
+49.89.74423-206
India:
+91.80.28411633
www.ge.com/powerelectronics
September 11, 2013 ©2013 General Electric Company. All rights reserved. Version 1.16
Ordering Information
Please contact your GE Sales Representative for pricing, availability and optional features.
Table 8. Device Codes
Device Code Input
Voltage Range
Output
Voltage
Output
Current
On/Off
Logic Sequencing Comcodes
APXH003A0X-SRZ 2.4 – 5.5Vdc 0.6 – 3.63Vdc 3A Negative No CC109113313
APXH003A0X4-SRZ 2.4 – 5.5Vdc 0.6 – 3.63Vdc 3A Positive No CC109113321
APXH003A0X-SRDZ 2.4 – 5.5Vdc 0.6 – 3.63Vdc 3A Negative No CC109158795
APTH003A0X-SRZ 2.4 – 5.5Vdc 0.6 – 3.63Vdc 3A Negative Yes CC109113338
APTH003A0X4-SRZ 2.4 – 5.5Vdc 0.6 – 3.63Vdc 3A Positive Yes CC109113346
APTH003A0X-SR 2.4 – 5.5Vdc 0.6 – 3.63Vdc 3A Negative Yes CC109147484
Table 9. Coding Scheme
TLynx
family
Sequencing
feature.
Input
voltage
range
Output
current
Output
voltage
On/Off logic Options ROHS Compliance
AP T H 003A0 X 4 -SR -D Z
T = with Seq.
X = w/o Seq.
H = 2.4 –
5.5V
3.0A X =
programmable
output
4 = positive
No entry =
negative
S = Surface
Mount
R =
Tape&Reel
D = 105C
operating
ambient, 40G
operating
shock as per
MIL Std 810F
Z = ROHS6
