Data Sheet
March 28, 2008
Austin LynxTM SMT Non-Isolated dc-dc Power Modules:
3.0 Vdc - 5.5 Vdc Input, 0.9 Vdc - 3.3 Vdc Output, 10 A
Document Name: FDS02-034EPS ver.1.6
PDF Name: Austin Lynx SMT
Applications
n
Workstations,Servers and Desktop computers
n
Distributed Power Architectures
n
Telecommunications Equipment
n
LANs/WANs
n
Data processing Equipment
n
Latest generation IC’s (DSP, FPGA, ASIC) and Micropro-
cessor-powered applications.
Options
n
Remote Sense
Features
n
Compatible with RoHS EU Directive 200295/EC
n
Compatible in Pb- free or SnPb reflow environment
n
Delivers up to 10A output current
n
High efficiency: 95% at 3.3V full load
n
Small size and low profile:
33 mm x 13.5 mm x 8.30 mm
(1.3 in x 0.53 in x 0.33 in)
n
Light Weight 0.23 oz(6.5 g)
n
Cost-efficient open frame design
n
High reliability: MTBF > 10M hours at 25 °C
n
Constant switching frequency (300 KHz typical)
n
Output overcurrent protection with auto-restart
n
Overtemperature protection
n
Surface Mount Package,Tape and Reel
n
Adjustable output voltage (-5% to +10% for 0.9V output)
n
Remote On/Of f
n
Wide Operating temperature range:-40 °C to +85 °C
n
UL* 60950 Recognized, CSA† C22.2 No. 60950-0 0 Certi-
fied, and VDE‡ 0805 (IEC60950, 3rd edition) Licensed
RoHS Compliant
Description
Austin Lynx™ power modules are non-isolated dc-dc converters that can deliver 10 A of ou tput current with full load effi-
ciency of 95% at 3.3 V output. These open frame modules in surface-mount-package enable designers to develop cost-and
space efficient solutions. Standard features include remote ON/OFF, output voltage adjustment, overcurrent and overtem-
perature protection.
* 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.
§ This product is intended for integration into end-use equipment. All the required procedures for CE marking of end-use equipment should be followed. (The CE mark is placed on selected products.)
** ISO is a registered trademark of the Internation Organization of Standards
Lineage Power 2
Data Sheet
March 28, 2008 3.0 Vdc - 5.5 Vdc Input, 0.9 Vdc - 3.3 Vdc Output, 10 A
Austin LynxTM SMT Non-Isolated dc-dc Power Modules:
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 implie d 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 reliabiltiy.
Electrical Specifications
Unless otherwise indicated, specifications apply over all operating input voltage, resistive load, and temperature conditions.
CAUTION: This power module is not internally fused. An input line fuse must always be used.
To preserve maximum flexibility, internal fusing is not included; howev er, to achieve maximum safety and
system protection, always use an input line fuse. The safety agencies require a time-delay fuse with a maximum rating of 20A.
Parameter Device Symbol Min Max Unit
Input Voltage:Continuous All VIN 0 6.5 Vdc
Operating Ambient Temperature
(See Thermal Considerations section) All TA –40 85 °C
Storage Temperature All Tstg –55 125 °C
Parameter Device Symbol Min Typ Max Unit
Operating Input Voltage AXH010A0S0R9-SR
AXH010A0S1R0-SR
AXH010A0P-SR
AXH010A0M-SR
AXH010A0Y-SR
AXH010A0D-SR
AXH010A0G-SR
AXH010A0F-SR
VIN
VIN
VIN
VIN
VIN
VIN
VIN
VIN
3.0
3.0
3.0
3.0
3.0
3.0
3.0
4.5
5.5
5.5
5.5
5.5
5.5
5.5
5.5
5.5
Vdc
Vdc
Vdc
Vdc
Vdc
Vdc
Vdc
Vdc
Maximum Input Current
(VI = 0 V to 75 V; IO = IO, max) II, max 9.5 Adc
Input Reflected Ripple Current, peak-peak
(5 Hz to 20 MHz, 1µH source impedance
TA = 25 °C;CIN =200µF)
All II 30 mAp-p
Input Ripple Rejection (120 Hz) All 40 dB
Lineage Power 3
Data Sheet
March 28, 2008 3.0 Vdc - 5.5 Vdc Input, 0.9 Vdc - 3.3 Vdc Output, 10 A
Austin LynxTM SMT Non-Isolated dc-dc Power Modules:
Electrical Specifications (continued)
General Specificat ions
Parameter Device Symbol Min Typ Max Unit
Output Voltage Set Point
(VI =5 Vdc; IO = IO, max, TA = 25 °C) AXH010A0S0R9-SR
AXH010A0S1R0-SR
AXH010A0P-SR
AXH010A0M-SR
AXH010A0Y-SR
AXH010A0D-SR
AXH010A0G-SR
AXH010A0F-SR
VO,set
VO,set
VO,set
VO,set
VO,set
VO,set
VO,set
VO,set
0.886
0.985
1.182
1.47
1.764
1.97
2.45
3.234
0.9
1.0
1.2
1.5
1.8
2.0
2.5
3.3
0.914
1.015
1.218
1.53
1.836
2.03
2.55
3.366
Vdc
Vdc
Vdc
Vdc
Vdc
Vdc
Vdc
Vdc
Output Voltage
(Over all operating input voltage, resistive load, and
temperature conditions at steady state until end of life.)
AXH010A0S0R9-SR
AXH010A0S1R0-SR
AXH010A0P-SR
AXH010A0M-SR
AXH010A0Y-SR
AXH010A0D-SR
AXH010A0G-SR
AXH010A0F-SR
VO
VO
VO
VO
VO
VO
VO
VO
0.873
0.970
1.164
1.455
1.746
1.94
2.425
3.2
—
—
—
—
—
—
—
—
0.927
1.03
1.236
1.545
1.854
2.06
2.575
3.4
Vdc
Vdc
Vdc
Vdc
Vdc
Vdc
Vdc
Vdc
Output Regulation:
Line (VI = VI, min to VI, max)
Load (IO = IO, min to IO, max)
Temperature (TA = TA, min to TA, max)
All
All
All
—
—
—
—
—
—
0.2
0.4
0.5
%, VO, set
%, VO, set
%, VO, set
Output Ripple and Noise
Measured across 10 µF Tantalum, 1µF Ceramic,,
RMS (5 Hz to 20 MHz bandwidth)
Peak-to-peak (5 Hz to 20 MHz bandwidth) All
All —
—7
25 15
30 mVrms
mVp-p
Output Current All IO 0 — 10 Adc
Output Current-limit Inception
(VO = 90% of VO, set) All IO, lim 17 — Adc
Output Short-circuit Current (Average) All IO, s/c — 3 — Adc
Efficiency
(VI = VIN, nom; IO = IO, max), TA = 25 °C AXH010A0S0R9-SR
AXH010A0S1R0-SR
AXH010A0P-SR
AXH010A0M-SR
AXH010A0Y-SR
AXH010A0D-SR
AXH010A0G-SR
AXH010A0F-SR
η
η
η
η
η
η
η
η
—
—
—
—
—
—
—
—
83
85
86
88
90
91
92
95
—
—
—
—
—
—
—
—
%
%
%
%
%
%
%
%
Switching Frequency All fSW — 300 — kHz
Parameter Min Typ Max Unit
Calculated MTBF (IO = 80% of IO, max TA = 25 °C)
Lineage RIN (Reliability Infomation Notebook) Method 10,240,000 Hours
Weight — 5.5(0.19) 6.5(0.23) g (oz.)
Lineage Power 4
Data Sheet
March 28, 2008 3.0 Vdc - 5.5 Vdc Input, 0.9 Vdc - 3.3 Vdc Output, 10 A
Austin LynxTM SMT Non-Isolated dc-dc Power Modules:
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 Unit
Remote On/Off Signal Interface
(VI = VI,min to VI, max; open collector npn or Compatible, Von/of f
signal referenced to GND. See Figure 20 and Feature
Descriptions section)
Logic High (ON/OFF pin open—Module On)
Ion/off = 0.0 µA
Von/off = VI -0.4
Logic Low (VON/OFF < 0.3 V)—Module Off
Ion/off = 0.5 mA
Von/off = 0.3 V
Turn-on time
(IO = 80% of IO, max; VO within ±1% of steady state; see
Figure 12)
All
All
All
All
Von/off
Ion/off
Von/off
Ion/off
—5
6.5
10
0.3
1
V
µA
V
mA
ms
Output voltage set-point adjustment range (TRIM) AXH010A0S0R9-SR
All others Vtrim
Vtrim
-5
-10 +10
+10 %VO, set
%VO, set
Overtemperature Protection (shutdown) All TQ1/TQ2 —110— °C
Input Undervoltage Lockout
Turn-on Threshold
Turn-off Threshold All
All 2.63
2.47 2.8
2.7 2.95
2.9 V
V
Lineage Power 5
Data Sheet
March 28, 2008 3.0 Vdc - 5.5 Vdc Input, 0.9 Vdc - 3.3 Vdc Output, 10 A
Austin LynxTM SMT Non-Isolated dc-dc Power Modules:
Characteristic Curves
The following figures provide typical characteristics curves at room temperature (TA = 25 °C).
Figure 1. Typical Input Characteristic at 10A Output
Current.
Figure 2. Output Voltage and current characteristics.
Figure 3. Converter Efficiency vs output cur r en t
AXH010A0S0R9-SR(0.9V Output Voltage).
Figure 4. Converter Efficiency vs output current
AXH010A0S1R0-SR(1.0V Output Voltage).
Figure 5. Converter Efficiency vs output current
AXH010A0P-SR(1.2V Output Voltage).
Figure 6. Converter Efficiency vs output current
AXH010A0M-SR(1.5V Output Voltage).
2 2.5 3 3.5 4 4.5 5 5.
5
12
10
8
6
4
2
0
II, max = 9.5 A
INPUT V OLTAGE, V
I
(V)
INPUT CURRENT, I
I
(A)
100%
75%
50%
25%
0
0% 369 1
8
12 15
OUTPUT CURRENT, I
O
(A)
NORMALIZED OUTPUT VOLTAGE, V
O
VI = 5.5 V
VI = 5.0 V
VI = 3.3 V
VI = 3.0 V
74
76
78
80
82
84
86
88
90
1234567891
0
OUTPUT CURRENT, I
O
(A)
EFFICIENCY, η (%)
VI = 3.0 V
VI = 3.3 V
VI = 5.0 V
VI = 5.5 V
74
76
78
80
82
84
86
88
90
92
V
I
= 3.0 V
V
I
= 3.3 V
V
I
= 5.0 V
V
I
= 5.5 V
OUTPUT CURRENT, I
O
(A)
EFFICIENCY, η (%)
1234567891
0
OUTPUT CURRENT, I
O
(A)
EFFICIENCY, η (%)
78
80
82
84
86
88
90
92
1234567891
0
V
I
= 3.0 V
V
I
= 3.3 V
V
I
= 5.0 V
V
I
= 5.5 V
OUTPUT CURRENT, I
O
(A)
EFFICIENCY, η (%)
82
84
86
88
90
92
94
1234567891
0
V
I
= 3.0 V
V
I
= 3.3 V
V
I
= 5.0 V
V
I
= 5.5 V
Lineage Power 6
Data Sheet
March 28, 2008 3.0 Vdc - 5.5 Vdc Input, 0.9 Vdc - 3.3 Vdc Output, 10 A
Austin LynxTM SMT Non-Isolated dc-dc Power Modules:
Characteristic Curves
The following figures provide typical characteristics curves at room temperature (TA = 25 °C)
Figure 7. Converter Effici ency vs output curren t
AXH010A0SY-SR(1.8V Output Voltage).
Figure 8. Converter Effici ency vs output curren t
AXH010A0D-SR(2.0V Output Voltage).
Figure 9. Converter Efficiency vs output cur r en t
AXH010A0G-SR(2.5V Output Voltage).
Figure 10. Converter Efficiency vs output current
AXH010A0F-SR(3.3V Output Voltage).
Figure 11. Typical Output Ripple Voltage at 10A Output
Current.
Figure 12. Typical Start-up Transient.
84
86
88
90
92
94
1234567891
0
OUTPUT CURRENT, I
O
(A)
EFFICIENCY, η (%)
V
I
= 3.0 V
V
I
= 3.3 V
V
I
= 5.0 V
V
I
= 5.5 V
86
88
90
92
94
96
1234567891
0
OUTPUT CURRENT, I
O
(A)
EFFICIENCY, η (%)
V
I
= 3.0 V
V
I
= 3.3 V
V
I
= 5.0 V
V
I
= 5.5 V
88
90
92
94
96
98
1234567891
O
EFFICIENCY, η (%)
V
I
= 3.0 V
V
I
= 3.3 V
V
I
= 5.0 V
V
I
= 5.5 V
93.5
94
94.5
95
95.5
96
96.5
97
1234567891
0
OUTPUT CURRENT, IO (A)
EFFICIENCY, η (%)
VI = 4.5 V
VI = 5.0 V
VI = 5.5 V
TIME, t (2 µs/div)
OUTPUT V OLTA GE, V
O
(V)
(20 mV/div)
V
I
= 3.0 V
V
I
= 3.3 V
VI = 5.0 V
V
I
= 5.5 V
TIME, t (2 ms/div)
OUTPUT V OLTAGE, V
O
(V)
VIN SOURCE
Lineage Power 7
Data Sheet
March 28, 2008 3.0 Vdc - 5.5 Vdc Input, 0.9 Vdc - 3.3 Vdc Output, 10 A
Austin LynxTM SMT Non-Isolated dc-dc Power Modules:
Characteristic Curves
The following figures provide typical characteristics curves at room temperatu re (TA = 25 °C)
Figure 13. Typical Transien t Respo nse to Step Load
Change at 2.5 A/µs from 100% to 50% of
IO,max at 3.3 V Input
(COUT = 1 µF ceramic, 10 µF Tantalum).
Figure 14. Typical Transien t Respo nse to Step Load
Change at 2.5 A/µs from 50% to 100% of
IO,max at 3.3 V Input
(COUT = 1 µF ceramic, 10 µF Tantalum).
TIME, t (5 µs/div)
OUTPUT CURRENT I
O
( 2.5 A/div)
OUTPUT VOLTAGE V
O
(100 mV/div)
TIME, t (5 µs/div)
OUTPUT CURRENT I
O
( 2.5 A/div)
OUTPUT VOLTAGE V
O
(100 mV/div)
Lineage Power 8
Data Sheet
March 28, 2008 3.0 Vdc - 5.5 Vdc Input, 0.9 Vdc - 3.3 Vdc Output, 10 A
Austin LynxTM SMT Non-Isolated dc-dc Power Modules:
Test Configurations
Note: Measure input reflected ripple current with a simulated source
inductance (LTEST) of 1µH. Capacitor CS offsets possible bat-
tery impedance. Measure current as shown above.
Figure 15. Input Reflected Ripple Current Test Setup.
Note: Scope measurements should be made using a BNC socket,
with a 10 µF tantalum capacitor and a 1 µF ceramic capcitor.
Position the load between 51 mm and 76 mm (2 in and 3 in)
from the module
Figure 16. Peak-to-Peak Output Ripple Measurement
Test Set up.
Note: All voltage measurements to be taken at the module termi-
nals, as shown above. If sockets are used then Kelvin con-
nections are required at the module terminals to avoid
measurement errors due to socket contact resistance.
Figure 17. Output Voltage and Efficiency Test Setup.
Design Considerations
Input Source Impedance
To maintain low-noise and ripple at the input voltage, it is
critical to use low ESR capacitors at the input to the module.
18 shows the input ripple voltage (mVp-p) for various output
models using a 150 µF low ESR polymer capacitor (Pana-
sonic p/n: EEFUE0J151R, Sanyo p/n: 6TPE150M) in parallel
with 47 µF ceramic capacitor (Panasonic p/n: ECJ-
5YB0J476M,
Taiyo Yuden p/n: CEJMK432BJ476MMT). 19 depicts much
lower input voltage ripple when input capacitance is
increased to 450 µF (3 x 150 µF) polymer capacitors in par-
allel with 94 µF (2 x 47 µF) ceramic capacitor.
The input ca pacit ance sh ould be able to handle an AC ripple
current of at least:
Figure 18. Input Voltage Ripple for Various
Output Models, IO = 10 A
(CIN = 150 µF polymer // 47 µF ceramic).
Figure 19. Input Voltage Ripple for Various
Output Models, IO = 10 A (CIN = 3x150 µF
polymer // 2x47 µF ceram ic).
BATTERY
L
1 µH
CS 220 μF
ESR < 0.1 Ω
@ 20 °C, 100 kHz
VI (+)
VI (–)
2 x 100µF
Tantalum
VO
GND
RESISTIVE
LOAD
SCOPE
10 µF
COPPER STRIP
TANTALUM
1µF
CERAMIC
VIVO
IIIO
SUPPLY
C
ONTACT RESISTANCE
CONTACT AND
DISTRIBUTION LOSSES
LOAD
GND
ηVO(+) VO(-)
–[]IO
×
VI(+) VI(-)
–[]II
×
------------------------------------------------
⎝⎠
⎛⎞
100×=
Irms Iout Vout
Vin
-----------1Vout
Vin
-----------
–= Arms
0
50
100
150
200
0.5 1 1.5 2 2.5 3
V
I
= 5 V
V
I
= 3.3 V
OUTPUT VOLTAGE, V
O
(Vdc)
INPUT VOLTAGE NOISE (mV p-p)
0
25
50
75
100
0.5 1 1.5 2 2.5 3
VI = 5 V
VI = 3.3 V
OUTPUT VOLTAGE, V
O
(Vdc)
INPUT VOLTAGE NOISE (mV p-p)
Lineage Power 9
Data Sheet
March 28, 2008 3.0 Vdc - 5.5 Vdc Input, 0.9 Vdc - 3.3 Vdc Output, 10 A
Austin LynxTM SMT Non-Isolated dc-dc Power Modules:
Design Considerations (continued)
Input Source Impedance (continued)
The power module should be connected to a low ac-imped-
ance input source. Highly inductive source impedances can
affect the stability of the module. An input capacitance must
be placed close to the input pins of the module, to filter ripple
current and ensure module stability in the presence of induc-
tive traces that supply the input voltage to the module.
Safety Considerations
For safety-agency approval of the system in which the power
module is used, the power module must be installed in com-
pliance with the spacing and separation requirements of the
end-use safety agency standard, i.e., UL60950, CSA C22.2
No. 60950-00, and VDE 0805:2001-12 (IEC60950, 3rd Ed).
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 maximum 20
A time-delay fuse in the ungrounded lead.
Lineage Power 10
Data Sheet
March 28, 2008 3.0 Vdc - 5.5 Vdc Input, 0.9 Vdc - 3.3 Vdc Output, 10 A
Austin LynxTM SMT Non-Isolated dc-dc Power Modules:
Feature Descriptions
Remote On/Off
The Austin Lynx™ SMT power modules feature an
On/Off pin for remote On/Off operation. If not using the
remote On/Off pin, leave the pin open (module will be On).
The On/Off pin signal (V on/off) is referenced to ground. To
switch the module on and off using remote On/Off, connect
an open collector npn transistor between the On/Off pin and
the GND pin (see Figure 20).
During a logic-high (On/Off pin is pulled high internal to the
module) when the transistor is in the off state the power
module is on. The maximum leakage current of the transistor
when Von/off = (VI –0.4) is 10 µA. The module is Off when
the On/Off pin is pulled low (Logic-low) with the transistor in
the active state. During this state VOn/Off is less than 0.3V
and the maximum IOn/Off = 1 mA.
Figure 20. Remote On/Off Implementation.
Output Voltage Set-Point Adjustment (Trim)
Output voltage set-point adjustmen t allows the output volt-
age set point to be increased or decreased by connecti ng
either an external resistor or a voltage source between the
TRIM pin and either the VO pin (decrease output voltage) or
GND pin (increase output voltage).
For TRIM-UP using an external resistor , connect Rtrim-up
between the TRIM and GND pins (21). The value of Rtrim-
up defined as:
|ΔVout| is the desired output voltage set-point adjustment
Rbuffer (internal to the module) is defined in Table 1 for vari-
ous models
Table 1. Austin Lynx™ Trim Values
Note: VO, set is the typical output voltage for the unit.
For example, to trim-up the output voltage of 1.5V
module (AXH010A0M-SR) by 8% to 1.62V, Rtrim-up is cal-
culated as follows:
Figure 21. Circuit Configuration to trim-up
output voltage.
For trim-down using an external resistor, connect Rtrim-
down between the TRIM and VOUT pins of the module (22).
The value of Rtrim-down is defined as:
Vout is the typical set point voltage of a module
|DVout| is the desired outpu t voltage adjustment
Rbuffer (internal to the module) is defined in Table 1 for vari-
ous models
For example, to trim-down the output voltage of 2.5 V mod-
ule (AXH010G-SR) by 8% to 2.3V, Rtrim-down is calculated
as follows:
Vo
Ion/off ON/OFF
VI
GND
+
Von/off
Rtrim up–24080
ΔVout
------------------ Rbuffer
–= kΩ
VO, set Rbuf f er
3.3 V 59 kΩ
2.5 V 78.7 kΩ
2.0 V 100 kΩ
1.8 V 100 kΩ
1.5 V 100 kΩ
1.2 V 59 kΩ
1.0 V 30.1 kΩ
0.9 V 5.11 kΩ
ΔVout 0.12V=
Rbuffer 100kΩ=
Rtrim up–24080
0.12
---------------100k–=
Rtrim up–100.66kΩ=
VO
TRIM
Rtrim-up
RLOAD
AXH010A0M-SR
GND
AXH010A0M9-SR
Rtrim-down
V
out
0
.
8
–
ΔVout
-------------------------1–
⎝⎠
⎛⎞
x30100 Rbuffer
–= k
Ω
Lineage Power 11
Data Sheet
March 28, 2008 3.0 Vdc - 5.5 Vdc Input, 0.9 Vdc - 3.3 Vdc Output, 10 A
Austin LynxTM SMT Non-Isolated dc-dc Power Modules:
Feature Descriptions (continued)
Output Voltage Set-Point Adjustment (Trim) (contin-
ued)
Figure 22. Circuit Configuration to trim-down
output voltage.
For T rim-up using an external voltage source, apply a voltage
from TRIM pin to ground using the following equation:
For Trim-down using an external voltage source, apply a volt-
age from TRIM pin to ground using the following equation:
Vtrim-up is the external source voltage for trim-up
Vtrim-down is the external source voltage for trim-down
|ΔVout| is the desired output voltage set-point adjustment
Rbuffer (internal to the module) is defined in Table 1 for vari-
ous models
If the TRIM feature is not being used, le ave the TRIM pin dis-
connected.
Remote Sense
Austin Lynx™ SMT power modules offer an option for a
Remote-Sense function. When the Device Code description
includes a suffix “3”, pin 3 is added to the module and the
Remote-Sense is an active feature. See the Orde ri n g In fo r-
mation at the end of this document for more informa tio n.
Remote Sense minimizes the effects of distribution losses by
regulating the voltage at the load via the SENSE and GND
connections (See 23). The voltage between the SENS E pin
and VO pin must not exceed 0.5V. Although both the
Remote-Sense and Trim features can each increase the out-
put voltage (VO), the maximum increase is not the sum of
both. The maximum VO increase is the large r of eithe r the
Remote Sense or th e Trim.
The amount of power delivered by the module is define d as
the output voltage multiplied by the output current (VO x IO).
When using SENSE and/or TRIM, the output voltage of the
module can increase which, if the same output current is
maintained, increases the power output by the module. Make
sure that the maximum output power of the module remains
at or below the maximum rated power. When pin 3 is present
but the Remote Sense feature is not being used, leave Sense
pin disconnected.
Figure 23. Effective Circuit Configuration for Remote
Sense Operation.
Overtempera tur e Prot ec ti o n
To provide additional protection in a fault condition, the unit is
equipped with a nonlatched thermal shutdown circuit. The
shutdown circuit engages when Q1 or Q2 (shown in Figure
24) exceeds approximately 110 °C. The unit attempts to
restart when Q1 or Q2 cool down and cycles on and off while
the fault condition exists. Recovery from shutdown is accom-
plished when the cause of the overtemperature condition is
removed.
Overcurrent Protection
To provide protection in a fault condition, the unit is equipped
with internal overcurrent protection. The unit ope rates nor-
mally once the faul t condition is remove d.
The power module will supply up to 170% of rated current for
less than 1.25 seconds before it enters thermal sh utdown.
Vout 2.5V=
Rbuffer 78.7k=
Rtrim down–2.5 0.8–
0.2
---------------------1–
⎝⎠
⎛⎞
x30100 78700–=
Rtrim down–147.05kΩ=
VO
TRIM
Rtrim-down
RLOAD
GND
Vtrim-up 0.8 ΔVoutxRbuffer
30100
------------------
–=
Vtrim-down 0.8 ΔVout xRbuffer
30100
------------------
+=
V
I
V
O
LOAD
GND
DISTRIBUTION LOSSES DISTRIBUTION LOSSES
SENSE
Lineage Power 12
Data Sheet
March 28, 2008 3.0 Vdc - 5.5 Vdc Input, 0.9 Vdc - 3.3 Vdc Output, 10 A
Austin LynxTM SMT Non-Isolated dc-dc Power Modules:
Thermal Considerations
The power module operates in a variety of thermal environ-
ments; however, sufficient cooling should be provided to
help ensure reliable operation of the unit. Heat is removed
by conduction, convection, and radiation to the surrounding
environment.
The thermal data presented is based on measurements
taken in a wind tunnel. The test setup shown in Figure 25
was used to collect data for Figures 26
and 27. Note that the airflow is parallel to the short axis of
the module as shown in Figure 24. The derating data applies
to airflow along either directi on of the module’s short axis.
Figure 24. Temperature Measurement Loca tion.
The temperature at either location should not exceed
110 °C. The output power of the mo du l e sh ou l d not exce ed
the rated power for the module (VO, set x IO, max).
Convection Requirements for Cooling
To predict the approximate cooling needed for the module,
refer to the Power Derating curves in Figures 26 and 27.
These derating curves are approximations of the ambient
temperatures and airflows required to keep the power mod-
ule temperature below its maximum rating. Once the module
is assembled in the actual system, the module’s temperature
should be checked as shown in Figure 24 to ensure it does
not exceed 110 °C.
Proper cooling can be verified by measuring the power mod-
ule’s temperature at Q1-pin 6 and Q2-pin 6 as shown in Fig-
ure 24.
Figure 25. Thermal Test Setup.
Figure 26. Typical Power Derating Vs Output Current
for 3.3 VIN.
Figure 27. Typical Power Derating Vs Output Current
for 5.0VIN.
Pin 6
AIRFLOW
Q2 Q1
Air
flow
x
Power Modul
e
W
ind Tunnel
PWBs
8.3
(0.33)
76.2
(3.0)
Probe Locatio
n
for measuring
airflow and
ambient
temperature
25.4
(1.0)
0
2
4
6
8
10
12
20 30 40 50 60 70 80 9
0
Ambient Temperature T
A
(˚C)
Output Current I
O
(A)
2.0 m/s (400 ft./min.)
1.0 m/s (200 ft./min.)
0.5 m/s (100 ft./min.)
NATURAL CONVECTION
0
1
2
3
4
5
6
7
8
20 30 40 50 60 70 80 9
0
AMBIENT TEMPERATURE, T
A
(˚C)
OUTPUT CURRENT, I
O
(A)
2.0 m/s (400 ft./min.)
1.0 m/s (200 ft./min.)
0.5 m/s (100 ft./min.)
NATURAL CONVECTION
Lineage Power 13
Data Sheet
March 28, 2008 3.0 Vdc - 5.5 Vdc Input, 0.9 Vdc - 3.3 Vdc Output, 10 A
Austin LynxTM SMT Non-Isolated dc-dc Power Modules:
Layout Considerations
Copper paths must not be routed beneath the power module.
Surface Mount Information
Pick and Place Area
Although the module weight is minimized by using open-
frame construction, the modules have a relatively large mass
compared to conventional surface-mount components. To
optimize the pick-and-place process, automated vacuum
equipment variables such as nozzle size, tip style, vacuum
pressure, and placement speed should be considered. Austin
Lynx™ SMT modules have a flat surface which serves as a
pick-and-place location for automated vacuum equipment.
The module’s pick-and-place location is identified by the tar-
get symbol on the top label as shown in Figure 28.
Figure 28. Pick and Place Location.
Nozzle Recommendations
The module weight has been kept to a minimum by using
open frame construction. Even so, these modules have a rel-
atively large mass when compared to conventional SMT
components. Variables such as nozzle size, tip style, vac-
uum pressure and pick & placement speed should be consid-
ered to optimize this process. The minimum recommended
nozzle diameter for reliable operation is 3mm. The maximum
nozzle outer diameter , which will safely fit within the allowable
component spacing, is 12 mm max.
Tin Lead Soldering
The Austin LynxTM SMT power modules are lead free mod-
ules and can be soldered either in a lead-free solder process
or in a conventional Tin/Lead (Sn/Pb) process. It is recom-
mended that the customer review data sheets in order to cus-
tomize the solder reflow profile for each application boa rd
assembly . The following instructions must be observed when
soldering these units. Failure to observe these instructi ons
may result in the failure of or cause damage to the mo dules,
and can adversely affect long-term reliability.
In a conventional Tin/Lead (Sn/Pb) solder process peak
reflow temperatures are limited to less than 235oC. T ypically,
the eutectic solder melts at 183oC, wets the land, and subse-
quently wicks the device connection. Sufficient time must be
allowed to fuse the plating on the connection to ensure a reli-
able solder joint. There are several types of SMT reflow
technologies currently used in the industry. These surface
mount power modules can be reliably soldered using natural
forced convection, IR (radiant infrared), or a combination of
convection/IR. For reliable soldering the solder reflow profile
should be established by accurately measuring the module s
CP connector temperatures.
Figure 29. Reflow Profile.
Figure 30. Time Limit curve above 2050C.
Lead Free Soldering
The –Z version Austin Lynx SMT modules are lead-free (Pb-
free) and RoHS compliant and are both forward and back-
ward compatible in a Pb-free and a SnPb 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 (Mois-
ture/Reflow Sensitivity Classification for Nonhermetic Solid
S tate 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 rec-
ommended linear reflow profile using Sn/Ag/Cu solder is
shown in Figure. 31.
0
50
100
150
200
250
300
REFL OW TIM E (S)
Preheat zone
max 4
o
Cs
-1
Soak zone
30-240s
Heat zone
max 4
o
Cs
-1
Peak Tem p 235
o
C
Cooling
zone
1-4
o
Cs
-1
T
lim
above
205
o
C
200
205
210
215
220
225
230
235
240
010 20
30
40
50 60
TIME (S)
Lineage Power 14
Data Sheet
March 28, 2008 3.0 Vdc - 5.5 Vdc Input, 0.9 Vdc - 3.3 Vdc Output, 10 A
Austin LynxTM SMT Non-Isolated dc-dc Power Modules:
Surface Mount Information (continued)
MSL Rating
The Austin LynxTM SMT modules have a MSL rating of 1.
Storage and Handling
The recommende d storage environment and handli ng proce-
dures 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 pack-
ages should not be broken until time of use. Once the origi-
nal package is broken, the floor life of the product at
conditions of £ 30°C and 60% relative humidity varies accord-
ing 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.
Post Solder Cleaning and Drying Considerations
Post solder cleaning is usually the final circuit-bo ard
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 Lineage
Power Board Mounted Power Modules: Soldering and
Cleaning Application Note (AP01-056EPS).
Figure 31. Recommended linear reflow profile using Sn/
Ag/Cu solder.
Solder Ball and Cleanliness Requirements
The open frame (no case or potting) power module will meet
the solder ball requirements per J-STD-001B. These require-
ments state that solder balls must neither be loose nor violate
the power module minimum electrical spacing.
The cleanline s s designator of the open frame power module
is C00 (per J specification).
Per J-STD-020 R ev. C
0
50
100
150
200
250
300
Reflow Time (Seconds)
Reflow Temp (°C)
Heating Zone
1° C/Second
Peak Temp 260°C
* Min. Ti me Above 235°C
15 Second s
*Time Above 217°C
60 Seconds
Cooling
Zone
Lineage Power 15
Data Sheet
March 28, 2008 3.0 Vdc - 5.5 Vdc Input, 0.9 Vdc - 3.3 Vdc Output, 10 A
Austin LynxTM SMT Non-Isolated dc-dc Power Modules:
Surface-Mount Tape and Reel
0
.995
(
25.2)
0.945
(24.0) 0.158
(4.0)
PICK POINT TOP COVER TAPE
EMBOSSED CARRIER
FEED
DIRECTION 1.45
(36.8)
1.59
(40.4)
1.73
(44.0)
TOP COVER TAPE EMBOSSED CARRIER
0.33
(8.38)
NOTE: CONFORMS TO EAI-481 REV. A STANDARD
Lineage Power 16
Data Sheet
March 28, 2008 3.0 Vdc - 5.5 Vdc Input, 0.9 Vdc - 3.3 Vdc Output, 10 A
Austin LynxTM SMT Non-Isolated dc-dc Power Modules:
Mechanical Outline Diagram
Dimensions are in millimeters and (inches).
Tolerances: x.x ± 0.5 mm (0.02 in.), x.xx ± 0.25 mm (0.010 in.), unless otherwise noted.
1.91 (0.075) LI INDUCTO
R
MAXIMUM
B
OTTOM VIEW OF BOARD SIDE VIEW
1.57
(0.062)
2.84
(0.112) SURFACE MOUNT CONTACT
848667093
6 PLACES
V
IN
GND V
OUT
TRIM SENSE
ON/OFF
33.00
(1.300)
7.87
(0.310) 4.83
(0.190) 7.54
(0.297)
4.83
(0.190) 4.83
(0.190)
1.22
(0.048)
13.46
(0.530)
10.29
(0.405)
1.58
(0.062)
8.28
(0.326)
See Note
Lineage Power 17
Data Sheet
March 28, 2008 3.0 Vdc - 5.5 Vdc Input, 0.9 Vdc - 3.3 Vdc Output, 10 A
Austin LynxTM SMT Non-Isolated dc-dc Power Modules:
Recommended Pad Layout
Dimensions are in millime ters and (inches).
Tolerances: x.x ± 0.5 mm (0.02 in.), x.xx ± 0.25 mm (0.010 in.), unless otherwise noted.
10.9
2
(0.43
0)
4.83
(0.190)
4.83
(0.190) 4.83
(0.190)
7.54
(0.297) 7.87
(0.310)
29.90
(1.177)
10.29
(
0.405)
0.64
(0.025)
ON/OFF
SENSE TRIM VOUT GND
VIN
PAD SIZE
MIN: 3.556 X 2.413 (0.140 X 0.095)
MAX: 4.19 X 2.79 (0.165 X 0.110)
Lineage Power 18
Data Sheet
March 28, 2008 3.0 Vdc - 5.5 Vdc Input, 0.9 Vdc - 3.3 Vdc Output, 10 A
Austin LynxTM SMT Non-Isolated dc-dc Power Modules:
Ordering Information
Please contact your Lineage Power Sales Representative for pricing, availability and optional features.
Table 2. Device Codes without TRIM
Table 3. Device Codes with TRIM
Input Voltage Output
Voltage Output
Current Efficiency Connector Type Device Code Comcodes
3.0 – 5.5 Vdc 0.9 V 10 A 83 SMT AXH010A0R0S9-SR 108967597
3.0 – 5.5 Vdc 1.0 V 10 A 85 SMT AXH010A0R1S0-SR 108967605
3.0 – 5.5 Vdc 1.2 V 10 A 86 SMT AXH010A0P-SR 108967571
3.0 – 5.5 Vdc 1.5 V 10 A 88 SMT AXH010A0M-SR 108967563
3.0 – 5.5 Vdc 1.8 V 10 A 90 SMT AXH010A0Y-SR 108967589
3.0 – 5.5 Vdc 2.0 V 10 A 91 SMT AXH010A0D-SR 108967530
3.0 – 5.5 Vdc 2.5 V 10 A 92 SMT AXH010A0G-SR 108967555
4.5 – 5.5 Vdc 3.3 V 10 A 95 SMT AXH010A0F-SR 108967548
3.0 – 5.5 Vdc 1.5 V 10 A 88 SMT AXH010A0M-SRZ CC109104915
3.0 – 5.5 Vdc 1.8 V 10 A 90 SMT AXH010A0Y-SRZ CC109104956
3.0 – 5.5 Vdc 2.5 V 10 A 92 SMT AXH010A0G-SRZ CC109104907
4.5 – 5.5 Vdc 3.3 V 10 A 95 SMT AXH010A0F-SRZ CC109106886
Input Voltage Output
Voltage Output
Current Efficiency Connector Type Device Code Comcodes
3.0 – 5.5 Vdc 0.9 V 10 A 83 SMT AXH010A0R0S99-SR 108966177
3.0 – 5.5 Vdc 1.0 V 10 A 85 SMT AXH010A0R1S09-SR 108966110
3.0 – 5.5 Vdc 1.2 V 10 A 86 SMT AXH010A0P9-SR 108966144
3.0 – 5.5 Vdc 1.5 V 10 A 88 SMT AXH010A0M9-SR 108966136
3.0 – 5.5 Vdc 1.8 V 10 A 90 SMT AXH010A0Y9-SR 108966169
3.0 – 5.5 Vdc 2.0 V 10 A 91 SMT AXH010A0D9-SR 108966102
3.0 – 5.5 Vdc 2.5 V 10 A 92 SMT AXH0 10A0G9-SR 108966128
4.5 – 5.5 Vdc 3.3 V 10 A 95 SMT AXH010A0F9-SR 108966094
3.0 – 5.5 Vdc 1.2 V 10 A 86 SMT AXH010A0P9-SRZ CC109105896
3.0 – 5.5 Vdc 1.5 V 10 A 88 SMT AXH010A0M9-SRZ CC109101417
3.0 – 5.5 Vdc 1.8 V 10 A 90 SMT AXH010A0Y9-SRZ CC109101425
3.0 – 5.5 Vdc 2.5 V 10 A 92 SMT AXH010A0G9-SRZ CC109102935
4.5 – 5.5 Vdc 3.3 V 10 A 95 SMT AXH010A0F9-SRZ CC109106878
Document Name: FDS02-034EPS ver.1.6
PDF Name: Austin Lynx SMT
Data Sheet
March 28, 2008 3.0 Vdc - 5.5 Vdc Input, 0.9 Vdc - 3.3 Vdc Output, 10 A
Austin LynxTM SMT Non-Isolated dc-dc Power Modules:
Wor ld Wide Headquar te rs
Lin e age P o w er Corp or a tio n
3000 Skyli ne Dri ve, M esquite, TX 75149, USA
+1-800-526-7819
(Outsid e U.S.A .: +1-972-284-2626)
www.line agepower. com
e-mail: techsu pp o rt1@lineagepo wer.com
A sia-Pacific Headqu art ers
T el: +65 6 416 4283
Europe, Mi ddle-East and Afri ca He adquarte rs
T el: +49 8 9 6089 286
Ind ia Head qu arters
T el: +91 8 0 28411633
Lineage Power reserves the right to m ake changes to the produc t(s) or information contained herein without notice. No liability is ass um ed as a resul t of their use or
application. No rights under any patent accompany the sale of any s uc h product(s ) or information.
© 2008 Lineage Power Corpor ati on, (Mesquite, Texas ) All International Rights Res erved.
Ordering Information (continued)
Optional remote sense feature can be ordered using suffix 3 shown in Table 4. For examp le, a AXH010A0Y-SR with remote
sense is AXH010A0Y3-SR
Table 4. Device Options
Option Suffix
Remote Sense 3
RoHS Compliant -Z