MIC5370/1
High-Performance Dual 150mA LDO
1.6mm x 1.6mm Thin MLF®
General Description
Features
The MIC5370/1 is an advanced dual LDO ideal for
powering general purpose portable devices. The
MIC5370/1 provides two independently-controlled, highperformance 150mA LDOs in a tiny 1.6mm x 1.6mm Thin
MLF® package.
Ideal for battery-powered applications, the MIC5370/1
offers 2% initial accuracy, low dropout voltage (155mV @
150mA) and low ground current (typically 32μA per LDO).
The MIC5370/1 can also be put into a zero-off-mode
current state, drawing virtually no current when disabled.
When the MIC5371 is disabled an internal resistive load is
automatically applied to the output to discharge the output
capacitor. This LDO offers fast transient response and
high PSRR while consuming a minimum operating current.
The MIC5370/1 is available in fixed output voltages in a
lead-free (RoHS-compliant) 6-pin 1.6mm x 1.6mm Thin
MLF® package.
Data sheets and support documentation can be found on
Micrel’s web site at: www.micrel.com.
• 2.5V to 5.5V input voltage range
• Two 150mA output current LDOs
• High output accuracy
– ±2% initial accuracy
• Low quiescent current – 32µA per LDO
• Stable with 1µF ceramic output capacitors
• Independent enable pins
• Low dropout voltage – 155mV at 150mA
• Thermal-shutdown protection
• Current-limit protection
• Output discharge circuit – MIC5371
• 6-pin 1.6mm x 1.6mm Thin MLF® package
Applications
•
•
•
•
Camera phones
Mobile phones
GPS, PMP, PDAs and handhelds
Portable electronics
___________________________________________________________________________________________________________
Typical Application
MIC5370/1-xxYMT
VBAT
1µF
VIN
VOUT1
I/O
EN1
VOUT2
VCORE
1µF
EN2
1µF
GND
Camera DSP Power Supply Circuit
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
May 2011
M9999-052011-C
Micrel, Inc.
MIC5370/1
Block Diagrams
VIN
VOUT1
LDO1
LDO2
EN1
EN2
VOUT2
ENABLE
REFERENCE
GND
MIC5370 Block Diagram
VIN
VOUT1
LDO1
LDO2
EN1
EN2
VOUT2
ENABLE
AUTO
DISCHARGE
REFERENCE
GND
MIC5371 Block Diagram
May 2011
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M9999-052011-C
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MIC5370/1
Ordering Information
Part Number
Manufacturing
Part Number
Marking
Code
Voltage
Junction
Temperature
Range
Package
Lead
Finish
MIC5370-3.3/3.3YMT
MIC5370-SSYMT
8SS
3.3V/3.3V
–40°C to +125°C
6-Pin 1.6mm × 1.6mm
®
Thin MLF
Pb-Free
MIC5370-3.3/3.0YMT
MIC5370-SPYMT
SP8
3.3V/3.0V
–40°C to +125°C
6-Pin 1.6mm × 1.6mm
®
Thin MLF
Pb-Free
MIC5370-3.3/2.8YMT
MIC5370-SMYMT
SM8
3.3V/2.8V
–40°C to +125°C
6-Pin 1.6mm × 1.6mm
®
Thin MLF
Pb-Free
MIC5370-3.3/2.6YMT
MIC5370-SKYMT
S8K
3.3V/2.6V
–40°C to +125°C
6-Pin 1.6mm × 1.6mm
®
Thin MLF
Pb-Free
MIC5370-3.3/1.8YMT
MIC5370-SGYMT
SG8
3.3V/1.8V
–40°C to +125°C
6-Pin 1.6mm × 1.6mm
®
Thin MLF
Pb-Free
MIC5370-3.0/3.0YMT
MIC5370-PPYMT
P8P
3.0V/3.0V
–40°C to +125°C
6-Pin 1.6mm × 1.6mm
®
Thin MLF
Pb-Free
MIC5370-3.0/2.8YMT
MIC5370-PMYMT
PM8
3.0V/2.8V
–40°C to +125°C
6-Pin 1.6mm × 1.6mm
®
Thin MLF
Pb-Free
MIC5370-3.0/2.6YMT
MIC5370-PKYMT
P8K
3.0V/2.6V
–40°C to +125°C
6-Pin 1.6mm × 1.6mm
®
Thin MLF
Pb-Free
MIC5370-3.0/1.8YMT
MIC5370-PGYMT
PG8
3.0V/1.8V
–40°C to +125°C
6-Pin 1.6mm × 1.6mm
®
Thin MLF
Pb-Free
MIC5370-2.8/2.8YMT
MIC5370-MMYMT
MM8
2.8V/2.8V
–40°C to +125°C
6-Pin 1.6mm × 1.6mm
®
Thin MLF
Pb-Free
MIC5370-2.8/2.6YMT
MIC5370-MKYMT
M8K
2.8V/2.6V
–40°C to +125°C
6-Pin 1.6mm × 1.6mm
®
Thin MLF
Pb-Free
MIC5370-2.8/1.8YMT
MIC5370-MGYMT
MG8
2.8V/1.8V
–40°C to +125°C
6-Pin 1.6mm × 1.6mm
®
Thin MLF
Pb-Free
MIC5370-2.8/1.5YMT
MIC5370-MFYMT
MF8
2.8V/1.5V
–40°C to +125°C
6-Pin 1.6mm × 1.6mm
®
Thin MLF
Pb-Free
MIC5370-2.8/1.2YMT
MIC5370-M4YMT
J48
2.8V/1.2V
–40°C to +125°C
6-Pin 1.6mm × 1.6mm
®
Thin MLF
Pb-Free
MIC5370-1.8/1.2YMT
MIC5370-G4YMT
8G4
1.8V/1.2V
–40°C to +125°C
6-Pin 1.6mm × 1.6mm
®
Thin MLF
Pb-Free
MIC5370-1.2/1.0YMT
MIC5370-4CYMT
84C
1.2V/1.0V
–40°C to +125°C
6-Pin 1.6mm × 1.6mm
®
Thin MLF
Pb-Free
MIC5371-3.3/3.3YMT*
MIC5371-SSYMT
9SS
3.3V/3.3V
–40°C to +125°C
6-Pin 1.6mm × 1.6mm
®
Thin MLF
Pb-Free
MIC5371-3.3/3.0YMT*
MIC5371-SPYMT
9SP
3.3V/3.0V
–40°C to +125°C
6-Pin 1.6mm × 1.6mm
®
Thin MLF
Pb-Free
MIC5371-3.3/2.8YMT*
MIC5371-SMYMT
9SM
3.3V/2.8V
–40°C to +125°C
6-Pin 1.6mm × 1.6mm
®
Thin MLF
Pb-Free
MIC5371-3.3/1.8YMT*
MIC5371-SGYMT
9SG
3.3V/1.8V
–40°C to +125°C
6-Pin 1.6mm × 1.6mm
®
Thin MLF
Pb-Free
MIC5371-3.0/3.0YMT*
MIC5371-PPYMT
9PP
3.0V/3.0V
–40°C to +125°C
6-Pin 1.6mm × 1.6mm
®
Thin MLF
Pb-Free
May 2011
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MIC5370/1
Ordering Information (Continued)
Part Number
Manufacturing
Part Number
Marking
Code
Voltage
Junction
Temperature
Range
Package
Lead
Finish
MIC5371-3.0/2.8YMT*
MIC5371-PMYMT
9PM
3.0V/2.8V
–40°C to +125°C
6-Pin 1.6mm × 1.6mm
®
Thin MLF
Pb-Free
MIC5371-2.8/2.8YMT*
MIC5371-MMYMT
9MM
2.8V/2.8V
–40°C to +125°C
6-Pin 1.6mm × 1.6mm
®
Thin MLF
Pb-Free
MIC5371-2.8/1.8YMT*
MIC5371-MGYMT
9MG
2.8V/1.8V
–40°C to +125°C
6-Pin 1.6mm × 1.6mm
®
Thin MLF
Pb-Free
MIC5371-2.8/1.5YMT*
MIC5371-MFYMT
9MF
2.8V/1.5V
–40°C to +125°C
6-Pin 1.6mm × 1.6mm
®
Thin MLF
Pb-Free
MIC5371-2.8/1.2YMT*
MIC5371-M4YMT
9M4
2.8V/1.2V
–40°C to +125°C
6-Pin 1.6mm × 1.6mm
®
Thin MLF
Pb-Free
MIC5371-1.8/1.2YMT*
MIC5371-G4YMT
9G4
1.8V/1.2V
–40°C to +125°C
6-Pin 1.6mm × 1.6mm
®
Thin MLF
Pb-Free
MIC5371-1.2/1.0YMT*
MIC5371-4CYMT
94C
1.2V/1.0V
–40°C to +125°C
6-Pin 1.6mm × 1.6mm
®
Thin MLF
Pb-Free
Note:
1.
Other voltages available. Contact Micrel for details.
2.
Thin MLF Pin 1 Identifier = ▲
3.
Thin MLF is a GREEN RoHS-compliant package. Level finish is NiPdAu. Mold compound is Halogen Free.
*
MIC5371 offers Auto-Discharge function.
®
®
May 2011
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MIC5370/1
Pin Configuration
VIN 1
6
VOUT1
GND 2
5
VOUT2
EN2 3
4
EN1
6-Pin 1.6mm x 1.6mm Thin MLF® (MT)
Pin Description
Pin Number
Pin Name
Pin Function
1
VIN
Supply Input
2
GND
Ground
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
VOUT2
Regulator Output – LDO2
6
VOUT1
Regulator Output – LDO1
EPAD
HS Pad
Heatsink Pad internally connected to ground.
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MIC5370/1
Absolute Maximum Ratings(1)
Operating Ratings(2)
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
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
1.6x1.6 Thin MLF®-6 (θJA) .................................90°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
Output Voltage Accuracy
Condition
Min.
Variation from nominal VOUT
Variation from nominal VOUT; –40°C to +125°C
Typ.
Max.
Units
–2.0
+2.0
%
–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
%
IOUT = 50mA
55
IOUT = 150mA
155
VEN1 = High; VEN2 = Low; IOUT = 0mA
32
45
VEN1 = Low; VEN2 = High; IOUT = 0mA
32
45
VEN1 = VEN2 = High; IOUT1 = IOUT2 = 0mA
57
85
0.05
1
µA
550
mA
Dropout Voltage
Ground Pin Current
Ground Pin Current in Shutdown
VEN1 = VEN2 = 0V
110
310
mV
µA
Ripple Rejection
f = 1kHz; COUT = 1µF
Current Limit
VOUT = 0V
60
Output Voltage Noise
COUT = 1µF, 10Hz to 100kHz
200
µVRMS
Auto-Discharge NFET
Resistance
MIC5371 Only; VEN1 = VEN2 = 0V; VIN = 3.6V
30
Ω
200
325
dB
Enable Inputs (EN1/EN2)
Enable Input Voltage
Enable Input Current
Turn-on Time
Logic Low
0.2
Logic High
1.2
VIL ≤ 0.2V
0.01
1
VIH ≥ 1.2V
0.01
1
COUT = 1µF
50
125
V
µA
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.
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MIC5370/1
Typical Characteristics
Power Supply
Rejection Ratio
Output Voltage
vs. Input Voltage
3.0
100µA
LDO1-150mA
2.5
2.85
LDO1-100µA
2.0
50mA
150mA
2.90
Output Voltage
vs. Output Current
1.5 LDO2-100µA
LDO2-150mA
2.80
1.0
VIN = VEN = 3.8V
VOUT = 1.8V
COUT = 1µF
0
10
100
1k 10k 100k 1M 10M
FREQUENCY (Hz)
Ground Current
vs. Input Voltage
40
50mA
38
24
22
20
2.5
180
VIN = VEN = 2.8V
VOUT2 = 1.8V
CIN = COUT = 1µF
3.0 3.5 4.0 4.5 5.0
INPUT VOLTAGE (V)
5.5
Dropout Voltage
vs. Output Current
60
55 07 5 100 125 150
OUTPUT CURRENT (mA)
Ground Current
vs. Temperature
Dual Outputs(100µA)
40
Single Output
VIN = 3.8V
VOUT1 = 2.8V
VOUT2 = 1.2V
CIN = COUT = 1µF
20
10
0
02
250
55 07 5 100 125 150
OUTPUT CURRENT (mA)
Dropout Voltage
vs. Temperature
CIN = C OUT = 1µF
200
150m A
Single Output(50mA)
30
Single Output(100µA)
20
VIN = V EN = 3.8V
VOUT1 = 1.8V
VOUT2 = 2.8V
CIN = C OUT = 1µF
10
0
-40 -20 0 20 40 60 80 100 120
TEMPERATURE (°C)
500
Current Limit
vs. Input Voltage
400
LDO2
150
80
100m A
100
60
May 2011
2.70
02
VIN = VEN = VOUT + 1V
VOUT = 2.8V
CIN = COUT = 1µF
50
30
100
1.2
1.1
1.0
0.9
0.8
0.7
0.6
0.5
0.4
0.3
0.2
0.1
0
2.5
Dual Output
40
100µA
120
0
02
Ground Current
vs. Output Current
50
140
20
5.5
2.75
60
160
40
3.0 3.5 4.0 4.5 5.0
INPUT VOLTAGE (V)
70
34 150mA
32
26
0
2.5
80
36
30
28
VOUT1 = 2.8V
VOUT2 = 1.8V
CIN = COUT =1µF
0.5
300
LDO1
200
50mA
VOUT = 2.8V
CIN = COUT = 1µF
55 07 5 100 125 150
OUTPUT CURRENT (mA)
Enable Voltage
vs. Input Voltage
50
100
10mA
0
-40 -20 0 20 40 60 80 100 120
TEMPERATURE (°C)
10
0
2.5
VOUT1 = 1.8V
VOUT2 = 2.8V
CIN = COUT = 1µF
3.0 3.5 4.0 4.5 5.0
INPUT VOLTAGE (V)
5.5
Output Noise
Spectral Density
1
EN1 ON
0.1
EN1 OFF
VOUT1 = 2.5V
CIN = COUT = 1µF
Load = 150mA
3.0 3.5 4.0 4.5 5.0
INPUT VOLTAGE (V)
5.5
0.01
0.001
10
VIN = 4.5V
VOUT = 1V
COUT1 = C OUT2 1µF
100
1k 10k 100k 1M 10M
FREQUENCY (Hz)
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MIC5370/1
Functional Characteristics
May 2011
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MIC5370/1
When disabled the MIC5371 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..
Application Information
MIC5370/1 is a dual 150mA LDO in a small 1.6mm x
1.6mm package.. The MIC5371 includes an autodischarge circuit for each of the LDO outputs that are
activated when the output is disabled. The MIC5370/1
regulator is fully protected from damage due to fault
conditions through linear current limiting and thermal
shutdown.
Thermal Considerations
The MIC5370/1 is designed to provide 150mA of
continuous current for both outputs in a very small
package. Maximum ambient operating temperature can
be calculated based on the output current and the
voltage drop across the part. For example if the input
voltage is 3.6V, the output voltage is 2.8V for VOUT1, 1.8V
for VOUT2 and the output current = 150mA. The actual
power dissipation of the regulator circuit can be
determined using the equation:
Input Capacitor
The MIC5370/1 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.
PD = (VIN – VOUT1) IOUT1 + (VIN – VOUT2) I OUT2 + VIN IGND
Because this device is CMOS and the ground current is
typically
