MIC5380/1
High Performance Dual 150mA LDO
1mm x 1mm Thin MLF®
MLF and MicroLeadFrame are registered trademarks of Amkor Technology, Inc.
Micrel Inc. • 2180 Fortune Drive • San Jose, CA 95131 • USA • tel +1 (408) 944-0800 • fax + 1 (408) 474-1000 • http://www.micrel.com
November 2008 M9999-110608-A
General Description
The MIC5380/1 is an advanced dual LDO ideal for
powering space constrained portable devices. The
MIC5380/1 provides two independently controlled, high
performance 150mA LDOs in an ultra small 1mm x 1mm
Thin MLF® package.
Ideal for battery powered applications, the MIC5380/1
offers ±1% typical accuracy, low dropout voltage (155mV
at 150mA) and low ground current. The MIC5380/1 can
also be put into a zero-off-mode current state, drawing
virtually no current when disabled.
The MIC5380/1 offers fast transient response and high
PSRR while consuming minimal operating current. When
the MIC5381 is disabled an internal resistive load is
automatically applied to the output to discharge the output
capacitor.
The MIC5380/1 is available with fixed output voltages in a
lead-free (RoHS compliant) 6-pin 1mm x 1mm Thin MLF®
package.
Data sheets and support documentation can be found on
Micrel’s web site at: www.micrel.com.
Features
• 6-pin 1mm x 1mm Thin MLF® package
• 2.5V to 5.5V input voltage range
• 150mA output current per LDO
• High output accuracy ±1% typical
• Low quiescent current 32µA per LDO
• Stable with 0402 1µF ceramic output capacitors
• Low dropout voltage 155mV at 150mA
• Output discharge circuit on MIC5381
• Independent enable pins
• Thermal shutdown protection
• Current limit protection
Applications
• Bluetooth headsets
• Mobile phones
• GPS, PMP, PDAs , DSCs
• USB thumb drive
• Medical handheld
• Portable handheld electronics
___________________________________________________________________________________________________________
Typical Application
MIC5380/1-xxYFT
VIN
EN1
EN2 1µF
1µF
VOUT1
VOUT2
1µF
VBAT
GND
I/O
VCORE
Camera DSP Power Supply Circuit
Micrel, Inc. MIC5380/1
November 2008 2 M9999-110608-A
Block Diagrams
VIN
EN1
GND
VOUT1
VOUT2
LDO1
ENABLE
REFERENCE
LDO2
EN2
MIC5380 Block Diagram
VIN
EN1
GND
VOUT1
VOUT2
LDO1
ENABLE
REFERENCE
LDO2
EN2
AUTO
DISCHARGE
MIC5381 Block Diagram
Micrel, Inc. MIC5380/1
November 2008 3 M9999-110608-A
Ordering Information
Lead Free
Part Number(1) Manufacturing
Part Number Marking
Code(2)
Voltage1
Voltage2 Junction
Temp. Range
Package(3)
MIC5380-3.3/3.3YFT MIC5380-SSYFT S2 3.3V 3.3V –40° to +125°C 6-Pin 1x1 Thin MLF®
MIC5380-3.0/3.0YFT MIC5380-PPYFT 2P 3.0V 3.0V –40° to +125°C 6-Pin 1x1 Thin MLF®
MIC5380-2.85/1.8YFT MIC5380-NGYFT NG 2.85V 1.8V –40° to +125°C 6-Pin 1x1 Thin MLF®
MIC5380-2.8/1.8YFT MIC5380-MGYFT GM 2.8V 1.8V –40° to +125°C 6-Pin 1x1 Thin MLF®
MIC5380-2.8/1.2YFT MIC5380-M4YFT 4M 2.8V 1.2V –40° to +125°C 6-Pin 1x1 Thin MLF®
MIC5380-2.7/2.7YFT MIC5380-LLYFT 2L 2.7V 2.7V –40° to +125°C 6-Pin 1x1 Thin MLF®
MIC5380-2.6/2.0YFT MIC5380-KHYFT KH 2.6V 2.0V –40° to +125°C 6-Pin 1x1 Thin MLF®
MIC5380-1.8/1.2YFT MIC5380-G4YFT 4G 1.8V 1.2V –40° to +125°C 6-Pin 1x1 Thin MLF®
MIC5381-3.3/3.3YFT * MIC5381-SSYFT MK 3.3V 3.3V –40° to +125°C 6-Pin 1x1 Thin MLF®
MIC5381-3.0/3.0YFT * MIC5381-PPYFT MF 3.0V 3.0V –40° to +125°C 6-Pin 1x1 Thin MLF®
MIC5381-2.8/1.8YFT * MIC5381-MGYFT MG 2.8V 1.8V –40° to +125°C 6-Pin 1x1 Thin MLF®
MIC5381-2.8/1.2YFT * MIC5381-M4YFT M4 2.8V 1.2V –40° to +125°C 6-Pin 1x1 Thin MLF®
MIC5381-1.8/1.2YFT * MIC5381-G4YFT G4 1.8V 1.2V –40° to +125°C 6-Pin 1x1 Thin MLF®
Note:
1. Other voltages available. Contact Micrel for details.
2. Thin MLF® Pin 1 Identifier = ▲.
3. Thin MLF® is a GREEN RoHS compliant package. Lead finish is NiPdAu. Mold compound is Halogen Free.
* MIC5381 offers Auto-Discharge function.
Micrel, Inc. MIC5380/1
November 2008 4 M9999-110608-A
Pin Configuration
1VOUT1
VOUT2
EN2
6
VI
N
GND
EN1
5
4
2
3
6-Pin 1mm x 1mm Thin MLF® (FT)
(Top View)
Pin Description
Pin Number Pin Name Pin Function
1 VOUT1 Regulator Output – LDO1.
2 VOUT2 Regulator Output – LDO2.
3 EN2 Enable Input (regulator 2). Active High Input. Logic High = On; Logic Low = Off;
Do not leave floating.
4 EN1 Enable Input (regulator 1). Active High Input. Logic High = On; Logic Low = Off;
Do not leave floating.
5 GND Ground.
6 VIN Supply Input.
Micrel, Inc. MIC5380/1
November 2008 5 M9999-110608-A
Absolute Maximum Ratings(1)
Supply Voltage (VIN) ........................................ –0.3V to +6V
Enable Voltage (VEN1, VEN2)............................... –0.3V to VIN
Power Dissipation (PD) ........................... Internally Limited(3)
Lead Temperature (soldering, 10sec.)....................... 260°C
Junction Temperature (TJ) ........................–40°C to +125°C
Storage Temperature (Ts) .........................–65°C to +150°C
ESD Rating(4).................................................................. 2kV
Operating Ratings(2)
Supply Voltage (VIN)....................................... +2.5V to 5.5V
Enable Voltage (VEN1, VEN2)............................... –0.3V to VIN
Junction Temperature (TJ) ........................ –40°C to +125°C
Junction Thermal Resistance
1mm x 1mm Thin MLF-6 (θJA) .........................150°C/W
Electrical Characteristics(5)
VIN = VEN1 = VEN2 = VOUT + 1V; higher of the two regulator outputs; IOUTLDO1 = IOUTLDO2 = 100µA; COUT1 = COUT2 = 1µF;
TJ = 25°C, bold values indicate –40°C to +125°C, unless noted.
Parameter Condition Min Typ Max Units
Variation from nominal VOUT ±1 % Output Voltage Accuracy
Variation from nominal VOUT; –40°C to +85°C –3.0 +3.0 %
Line Regulation VIN = VOUT +1V to 5.5V, IOUT = 100µA 0.02 0.3 %/V
Load Regulation IOUT = 100µA to 150mA 0.3 1 %
Dropout Voltage IOUT = 50mA
IOUT = 150mA
55
155
110
310
mV
mV
Ground Pin Current VEN1 = High; VEN2 = Low; IOUT = 0mA
VEN1 = Low; VEN2 = High; IOUT = 0mA
VEN1 = VEN2 = High; IOUT1 = IOUT2 = 0mA
32
32
59
45
45
85
µA
µA
µA
Ground Pin Current in
Shutdown
VEN1 = VEN2 = 0V 0.05 1 µA
Ripple Rejection f = 1kHz; COUT = 1µF 60 dB
Current Limit VOUT = 0V 200 325 550 mA
Output Voltage Noise COUT = 1µF, 10Hz to 100kHz 200 µVRMS
Auto-Discharge NFET
Resistance
MIC5381 Only; VEN1 = VEN2 = 0V; VIN = 3.6V 30 Ω
Enable Inputs (EN1/EN2)
Logic Low 0.2 V Enable Input Voltage
Logic High 1.2 V
VIL ≤ 0.2V 0.01 1 µA Enable Input Current
VIH ≥ 1.2V 0.01 1 µA
Turn-on Time COUT = 1µF 50 125 µs
Notes:
1. Exceeding the absolute maximum rating may damage the device.
2. The device is not guaranteed to function outside its operating rating.
3. The maximum allowable power dissipation of any TA (ambient temperature) is PD(max) = (TJ(max) – TA) / θJA. Exceeding the maximum allowable power
dissipation will result in excessive die temperature, and the regulator will go into thermal shutdown.
4. Devices are ESD sensitive. Handling precautions recommended. Human body model, 1.5kΩ in series with 100pF.
5. Specification for packaged product only.
Micrel, Inc. MIC5380/1
November 2008 6 M9999-110608-A
Typical Characteris t ics
0
Power Supply
Rejection Ratio
100
FREQUENCY (Hz)
10 1k 10k 1M
VIN = VEN = 3.8V
VOUT = 2.8V
COUT = 1µF
100µA
100k
0
0.5
1.5
2.5
2.5 3.5 4.5 5.5
INPUT VOLTAGE (V)
1.0
2.0
3.0
3.0 4.0 5.0
Output Voltage
vs. Input Voltage
VOUT1 = 2.8V
VOUT2 = 1.8V
CIN = COUT =1µF
LDO1-150mA
LDO1-100µA
LDO2-100µA LDO2-150mA
2.72
2.74
2.76
2.78
2.82
2.84
2.86
2.88
0 25 50 75 100 125 150
OUTPUT CURRENT (mA)
2.70
2.80
2.90
Output V oltage
vs. Output Cur rent
VIN = VEN
VOUT = 2.8V
CIN = COUT = 1µF
VIN=3.8V
VIN=5.5V
VIN=4.8V
20
22
24
26
28
30
32
34
36
38
40
2.5 3.5 4.5 5.5
INPUT VOLTAGE (V)
3.0 4.0 5.0
Ground Cur re nt
vs. Input Vo ltage
VIN = VEN
VOUT2 = 1.8V
CIN = COUT = 1µF
50mA
100µA
150mA
0
10
20
30
40
50
60
70
80
0 25 50 75 100 125 150
OUTPUT CURRENT (mA)
Ground Current
vs. Output Current
Single Output
Dual Output
VEN = VIN = VOUT + 1V
VOUT1 = 2.8V
VOUT2 = 1.2V
CIN = COUT = 1µF
20
25
30
35
40
45
50
55
60
65
Ground Cu rrent
vs. Te mper ature
-40 -20 0 20 40 60 80 100 120
TEMPERATURE (°C)
VIN = VEN = 3.8V
VOUT1 = 2.8V
VOUT2 = 1.8V
CIN = COUT = 1µF
Dual Output(100µA)
Single Outputs(100µA)
Single Output(50mA)
0
20
40
60
80
100
120
140
160
180
0 25 50 75 100 125 150
OUTPUT CURRENT (mA)
Dropo ut V ol tag e
vs. Output C urrent
VOUT = 2.8V
CIN = COUT = 1µF
0
50
100
150
200
250
Dropout Voltage
vs. Temperature
-40 -20 0 20 40 60 80 100 120
TEMPERATURE (°C)
10mA
150mA
100mA
50mA
CIN = COUT = 1µF
0
100
200
300
400
500
2.5 3.5 4.5 5.5
INPUT VOLTAGE (V)
3.0 4.0 5.0
Current Limit
vs. Input Volta ge
VOUT1 = 2.8V
VOUT2 = 1.8V
CIN = COUT = 1µF
LDO1
LDO2
0
0.2
0.4
0.6
0.8
1.0
3.03.5 4.04.5 5.05.5
INPUT VOLTAGE (V)
Enable Voltage
vs. Input Voltage
VOUT1 = 2.8V
CIN = COUT = 1µF
Load = 150mA
EN1 OFF
EN1 ON
0.001
0.01
0.1
1
10
Output N oise
Spectral Density
100
FREQUENCY (Hz)
10 1k 10k 1M100k 10M
VIN = 4.5V
VOUT = 1.2V
COUT = 1µF
Micrel, Inc. MIC5380/1
November 2008 7 M9999-110608-A
Functional Characteristics
Micrel, Inc. MIC5380/1
November 2008 8 M9999-110608-A
Application Information
MIC5380/1 is a dual 150mA LDO in a small 1mm x 1mm
Thin MLF® package. The MIC5381 includes an auto-
discharge circuit for each of the LDO outputs that is
activated when the output is disabled. The MIC5380/1
regulator is fully protected from damage due to fault
conditions through linear current limiting and thermal
shutdown.
Input Capacitor
The MIC5380/1 is a high-performance, high bandwidth
device. An input capacitor of 1µF capacitor is required
from the input-to-ground to provide stability. Low-ESR
ceramic capacitors provide optimal performance at a
minimum of space. Additional high-frequency capacitors,
such as small-valued NPO dielectric-type capacitors,
help filter out high-frequency noise and are good
practice in any RF-based circuit. X5R or X7R dielectrics
are recommended for the input capacitor. Y5V dielectrics
lose most of their capacitance over temperature and are
therefore, not recommended.
Output Capacitor
The MIC5380/1 requires an output capacitor of 1µF or
greater to maintain stability. The design is optimized for
use with low-ESR ceramic chip capacitors. High ESR
capacitors may cause high frequency oscillation. The
output capacitor can be increased, but performance has
been optimized for a 1µF ceramic output capacitor and
does not improve significantly with larger capacitance.
X7R/X5R dielectric-type ceramic capacitors are
recommended because of their temperature
performance. X7R-type capacitors change capacitance
by 15% over their operating temperature range and are
the most stable type of ceramic capacitors. Z5U and
Y5V dielectric capacitors change value by as much as
50% and 60%, respectively, over their operating
temperature ranges. To use a ceramic chip capacitor
with Y5V dielectric, the value must be much higher than
an X7R ceramic capacitor to ensure the same minimum
capacitance over the equivalent operating temperature
range.
No-Load Stability
Unlike many other voltage regulators, the MIC5380/1 will
remain stable and in regulation with no load. This is
especially important in CMOS RAM keep-alive
applications.
Enable/Shutdown
The MIC5380/1 comes with two active-high enable pins
that allow each regulator to be disabled independently.
Forcing the enable pin low disables the regulator and
sends it into a “zero” off-mode-current state. In this state,
current consumed by the regulator goes nearly to zero.
When disabled the MIC5381 switches a 30Ω (typical)
load on the regulator output to discharge the external
capacitor.
Forcing the enable pin high enables the output voltage.
The active-high enable pin uses CMOS technology and
the enable pin cannot be left floating; a floating enable
pin may cause an indeterminate state on the output.
Thermal Considerations
The MIC5380/1 is designed to provide 150mA of
continuous current for both outputs in a very small
package. Maximum ambient operating temperature can
be calculated based upon the output current and the
voltage drop across the part. For example, if the input
voltage is 3.6V, and the output voltage 3.0V for VOUT1,
3.0V for VOUT2 and output current = 150mA, then the
actual power dissipation of the regulator circuit can be
calculated using the equation:
PD = (VIN – VOUT1) IOUT1 + (VIN – VOUT2) I OUT2 + VIN IGND
Because this device is CMOS and the ground current is
typically <100µA over the load range, the power
dissipation contributed by the ground current is < 1%
and can be ignored for this calculation.
PD = (3.6V – 3.0V) × 150mA + (3.6V – 3.0V) × 150mA
P
D = 0.18W
To determine the maximum ambient operating
temperature of the package, use the junction-to-ambient
thermal resistance of the device and the following basic
equation:
⎟
⎟
⎠
⎞
⎜
⎜
⎝
⎛−
=
JA
AJ(MAX)
D(MAX) θ
TT
P
TJ(max) = 125°C, and the maximum junction temperature
of the die, θJA, thermal resistance = 150°C/W.
Substituting PD for PD(max) and solving for the ambient
operating temperature will give the maximum operating
conditions for the regulator circuit. The junction-to-
ambient thermal resistance for the minimum footprint is
150°C/W.
The maximum power dissipation must not be exceeded
for proper operation.
Micrel, Inc. MIC5380/1
November 2008 9 M9999-110608-A
For example, when operating the MIC5380-PPYFT at an
input voltage of 3.6V and 150mA loads at each output
with a minimum footprint layout, the maximum ambient
operating temperature TA can be determined as follows:
0.18W = (125°C – TA)/(150°C/W)
T
A = 98°C
Therefore, a 3.0V/3.0V application, with 150mA at each
output current, can accept an ambient operating
temperature of 98°C in a 1mm x 1mm MLF® package.
For a full discussion of heat sinking and thermal effects
on voltage regulators, refer to the “Regulator Thermals”
section of Micrel’s Designing with Low-Dropout Voltage
Regulators handbook. This information can be found on
Micrel's website at:
http://www.micrel.com/_PDF/other/LDOBk_ds.pdf
Micrel, Inc. MIC5380/1
November 2008 10 M9999-110608-A
U1
MIC5380/1-xxYFT
VIN
EN1
C3
1µF/10V
VOUT1
VOUT2
GND
EN2
J1
VIN
J7
EN1
J2
GND
C1
1µF/10V
C2
1µF/10V
J3
VOUT1
J5
VOUT2
J8
EN2
J4
GND
J6
GND
6
4
1
2
3
5
Bill of Materials
Item Part Number Manufacturer Description Qty.
GRM155R61A105KE19D Murata(1) Capacitor, 1µF Ceramic, 10V, X5R, Size 0402
C1005X5R1A105K TDK(2) Capacitor, 1µF Ceramic, 10V, X5R, Size 0402
C1, C2, C3
0402ZD105KAT2A AVX(3) Capacitor, 1µF Ceramic, 10V, X5R, Size 0402
3
U1 MIC5380/1-xxYFT Micrel(4) Dual, 150mA LDO, Size 1mm x 1mm Thin MLF® 1
Notes:
1. Murata: www.murata.com
2. TDK: www.tdk.com
3. AVX: avx.com
4. Micrel, Inc.: www.micrel.com
Micrel, Inc. MIC5380/1
November 2008 11 M9999-110608-A
PCB Layout Recommendations
Top Layer
Bottom Layer
Micrel, Inc. MIC5380/1
November 2008 12 M9999-110608-A
Package Information
6-Pin 1mm x 1mm Thin MLF® (FT)
MICREL, INC. 2180 FORTUNE DRIVE SAN JOSE, CA 95131 US
A
TEL +1 (408) 944-0800 FAX +1 (408) 474-1000 WEB http://www.micrel.com
The information furnished by Micrel in this data sheet is believed to be accurate and reliable. However, no responsibility is assumed by Micrel for its
use. Micrel reserves the right to change circuitry and specifications at any time without notification to the customer.
Micrel Products are not designed or authorized for use as components in life support appliances, devices or systems where malfunction of a product
can reasonably be expected to result in personal injury. Life support devices or systems are devices or systems that (a) are intended for surgical implan
t
into the body or (b) support or sustain life, and whose failure to perform can be reasonably expected to result in a significant injury to the user. A
Purchaser’s use or sale of Micrel Products for use in life support appliances, devices or systems is a Purchaser’s own risk and Purchaser agrees to fully
indemnify Micrel for any damages resulting from such use or sale.
© 2008 Micrel, Incorporated.
Mouser Electronics
Authorized Distributor
Click to View Pricing, Inventory, Delivery & Lifecycle Information:
Micrel:
MIC5381-PPYFT TR MIC5380-KHYFT TR MIC5380-MGYFT TR MIC5381-SSYFT TR MIC5380-NGYFT TR
MIC5380-M4YFT TR MIC5381-M4YFT TR MIC5380-SSYFT TR MIC5380-G4YFT TR MIC5381-MGYFT TR
MIC5380-LLYFT TR MIC5381-G4YFT TR MIC5380-PPYFT TR MIC5380-MGYFT-TR MIC5380-SSYFT-TR
MIC5380-G4YFT-TR MIC5380-LLYFT-TR MIC5380-PPYFT-TR MIC5380-NGYFT-TR MIC5381-PPYFT-TR
MIC5381-MGYFT-TR MIC5381-M4YFT-TR MIC5380-M4YFT-TR MIC5381-SSYFT-TR MIC5381-G4YFT-TR
MIC5380-KHYFT-TR
