MIC37150/37151/37152
Micrel
MIC37150/37151/37152
1.5A, Low Voltage
µ
Cap LDO Regulator
General Description
The Micrel MIC37150/51/52 is a 1.5A low-dropout linear
voltage regulator that provides a low voltage, high current
output with a minimum of external components. It offers high
precision, ultra-low dropout (500mV over temperature), and
low ground current.
The MIC37150/51/52 operates from an input of 2.25V to
6.0V. It is designed to drive digital circuits requiring low
voltage at high currents (i.e., PLDs, DSPs, microcontrollers,
etc.). It is available in fixed and adjustable output voltages.
Fixed voltages include 1.5V, 1.65V, 1.8V, 2.5V and 3.3V. The
adjustable version is capable of supplying output voltages
from 1.24V to 5.5V.
Features of the MIC37150/51/52 LDO include thermal and
current limit protection, and reverse current and reverse
battery protection. Logic enable and error flag pins are
available.
Junction temperature range of the MIC37150/51/52 is from
–40°C to 125°C.
For applications requiring input voltage greater than 6.0V,
see MIC3910x, MIC3915x, MIC3930x, and MIC3950x LDOs.
Data sheets and support documentation can be found on
Micrel’s web site at www.micrel.com.
Features
• 1.5A minimum guaranteed output current
• 500mV maximum dropout voltage over temperature
Ideal for 3.0V to 2.5V conversion
Ideal for 2.5V to 1.8V, 1.65V, or 1.5V conversion
• Stable with ceramic or tantalum capacitor
• Wide input voltage range:
V
IN
: 2.25V to 6.0V
• +1.0% initial output tolerance
• Fixed and adjustable output voltages
MIC37150—3-pin fixed voltages
MIC37151—5-pin fixed voltages
MIC37152—5-pin adjustable voltage
• Excellent line and load regulation specifications
• Logic controlled shutdown
• Thermal shutdown and current limit protection
• Reverse-leakage protection
• Low profile S-Pak 3 or 5 pin packages
Applications
•
•
•
•
•
LDO linear regulator for low-voltage digital IC
PC add-in cards
High efficiency linear power supplies
SMPS post regulator
Battery charger
Typical Application
V
IN
= 3.0V
C
IN
VEN
GND
FLG
MIC37151
VIN
VOUT
100k
V
OUT
= 2.5V
C
OUT
47µF, Ceramic
Fixed 2.5V Regulator with Error Flag
V
IN
C
IN
VEN
GND
ADJ
R2
MIC37152
VIN
VOUT
R1
C
OUT
47µF, Ceramic
1.3V
Adjustable Regulator
Super ßeta PNP is a trademark of Micrel, Inc.
Micrel, Inc. • 1849 Fortune Drive • San Jose, CA 95131 • USA • tel + 1 (408) 944-0800 • fax + 1 (408) 944-0970 • http://www.micrel.com
August 2003
1
MIC37150/37151/37152
MIC37150/37151/37152
Micrel
Ordering Information
Part Number
MIC37150-1.5BR
MIC37150-1.65BR
MIC37150-1.8BR
MIC37150-2.5BR
MIC37150-3.3BR
MIC37151-1.5BR
MIC37151-1.65BR
MIC37151-1.8BR
MIC37151-2.5BR
MIC37151-3.3BR
MIC37152BR
Output
Current
1.5A
1.5A
1.5A
1.5A
1.5A
1.5A
1.5A
1.5A
1.5A
1.5A
1.5A
Voltage*
1.5V
1.65V
1.8V
2.5V
3.3V
1.5V
1.65V
1.8V
2.5V
3.3V
ADJ.
Junction Temp. Range
–40°C to +125°C
–40°C to +125°C
–40°C to +125°C
–40°C to +125°C
–40°C to +125°C
–40°C to +125°C
–40°C to +125°C
–40°C to +125°C
–40°C to +125°C
–40°C to +125°C
–40°C to +125°C
Package
S-Pak-3
S-Pak-3
S-Pak-3
S-Pak-3
S-Pak-3
S-Pak-5
S-Pak-5
S-Pak-5
S-Pak-5
S-Pak-5
S-Pak-5
*For other voltages contact Micrel.
Pin Configuration
5
4
3
2
1
FLG/ADJ
VOUT
GND
VIN
EN
3
TAB
OUT
GND
IN
TAB
2
1
S-PAK-3 (R)
MIC37150
S-PAK-5 (R)
MIC37151
MIC37152
Pin Description
Pin Number
MIC37150
S-PAK-3
–
1
2
3
–
Pin Number
MIC37151/2
S-PAK-5
1
2
3
4
5
Pin Name
Pin Function
EN
VIN
GND
VOUT
FLG
MIC37151 only
ADJ
MIC37152 only
Enable (Input): CMOS compatible input. Logic high = enable, logic
low = shutdown.
Input voltage which supplies current to the output power device.
Ground (TAB is connected to ground on S-Pak)
Regulator Output
Error Flag (Output): Open collector output. Active low indicates an output
fault condition.
Adjustable regulator feedback input. Connect to resistor voltage divider.
MIC37150/37151/37152
2
August 2003
MIC37150/37151/37152
Micrel
Absolute Maximum Rating
(Note 1)
Supply Voltage (V
IN
) .................................................... 6.5V
Enable Input Voltage (V
EN
) .......................................... 6.5V
Power Dissipation .................................... Internally Limited
Junction Temperature ........................ –40°C
≤
T
J
≤
+125°C
Storage Temperature ......................... –65°C
≤
T
J
≤
+150°C
Lead Temperature (soldering, 5 sec.) ....................... 260°C
ESD,
Note 3
Operating Maximum Rating
(Note 2)
Supply Voltage (V
IN
) ..................................... 2.25V to 6.0V
Enable Input Voltage (V
EN
) ................................ 0V to 6.0V
Junction Temperature Range ............. –40°C
≤
T
J
≤
+125°C
Maximum Power Dissipation ....................................
Note 4
Package Thermal Resistance
S-Pak(θ
JC
) ......................................................... 2°C/W
Electrical Characteristics
(Note 5)
T
A
= 25°C with V
IN
= V
OUT
+ 1V; V
EN
= V
IN
;
bold
values indicate –40°C < T
J
< +125°C; unless otherwise noted.
Parameter
Output Voltage Accuracy
Condition
I
L
= 10mA
10mA < I
OUT
< I
L(max)
, V
OUT
+ 1
≤
V
IN
≤
6V
Output Voltage Line Regulation
Output Voltage Load Regulation
V
IN
– V
OUT
; Dropout Voltage;
Note 6
Ground Pin Current,
Note 7
Ground Pin Current in Shutdown
Current Limit
Start-up Time
Enable Input
Enable Input Threshold
Regulator enable
Regulator shutdown
Enable Pin Input Current
V
IL
≤
0.8V (regulator shutdown)
V
IH
≥
2.25V (regulator enabled)
Flag Output
I
FLG(LEAK)
V
FLG(LO)
V
FLG
V
OH
= 6V
V
IN
= 2.25V, I
OL
= 250µA,
Note 8
Low threshold, % of V
OUT
below nominal
Hysteresis
High threshold, % of V
OUT
below nominal
Reference Voltage
Reference Voltage
Adjust Pin Bias Current
Reference Voltage
Temp. Coefficient
Adjust Pin Bias Current
Temp. Coefficient
Note 10
Note 9
1.228
1.215
40
20
0.1
1.240
93
2
99.2
1.252
1.265
80
120
210
1
2
300
400
µA
µA
mV
mV
%
%
%
V
V
nA
nA
ppm/°C
nA/°C
1
15
2.25
0.8
2
4
30
75
V
V
µA
µA
µA
µA
V
IN
= V
OUT
+1.0V to 6.0V
I
L
= 10mA to 1.5A
I
L
= 750mA
I
L
= 1.5A
I
L
= 1.5A
V
IL
≤
0.5V, V
IN
= V
OUT
+ 1V
V
OUT
= 0
V
EN
= V
IN
, I
OUT
= 10mA, C
OUT
= 22µF
17
1.0
2.25
170
4.0
500
Min
–1
–2
0.06
0.2
Typ
Max
+1
+2
0.5
1
350
500
30
Units
%
%
%
%
mV
mV
mA
µA
A
µs
August 2003
3
MIC37150/37151/37152
MIC37150/37151/37152
Note 1.
Note 2.
Note 3.
Note 4.
Note 5.
Note 6.
Note 7.
Note 8.
Note 9.
Exceeding the absolute maximum ratings may damage the device.
The device is not guaranteed to function outside its operating rating.
Device is ESD sensitive. Handling precautions recommended.
P
D(MAX)
= (T
J(MAX)
– T
A
) /
θ
JA
, where
θ
JA
, depends upon the printed circuit layout. See
“Applications Information.”
Specification for packaged product only.
Micrel
V
DO
= V
IN
– V
OUT
when V
OUT
decreased to 98% of its nominal output voltage with V
IN
= V
OUT
+1V. For output voltages below 1.75V, dropout
voltage specification does not apply due to a minimum input operating voltage of 2.25V.
I
GND
is the quiescent current. I
IN
= I
GND
+ I
OUT
.
For a 2.5V device, V
IN
= 2.250V (device is in dropout).
V
REF
≤
V
OUT
≤
(V
IN
–1.0V), 2.25V
≤
V
IN
≤
6.0V, 10mA
≤
I
L
≤
1.5A, T
J
= T
MAX
.
Note 10.
Thermal regulation is defined as the change in output voltage at a time t after a change in power dissipation is applied, excluding load or line
regulation effects. Specifications are for a 200mA load pulse at V
IN
= 6V for t = 10ms.
MIC37150/37151/37152
4
August 2003
MIC37150/37151/37152
Micrel
Typical Characteristics
Power Supply
Rejection Ratio
80
V
IN
= 3.3V
V
OUT
= 2.5V
PSRR (dB)
Power Supply
Rejection Ratio
80
DROPOUT VOLTAGE (mV)
Dropout Voltage vs.
Output Current
350
300
250
200
150
100
50
0
0
400
800
1200
1600
OUTPUT CURRENT (mA)
2.5V
OUT
V
IN
= 3.3V
V
OUT
= 2.5V
60
PSRR (dB)
60
40
I
OUT
= 1.5A
C
OUT
= 10µF
C
IN
= 0
40
I
OUT
= 1.5A
C
OUT
= 47µF
C
IN
= 0
20
20
0
1E-2 1E-1 1E+0 1E+1 1E+2 1E+3
1
10
1k
0.01 0.1
100
FREQUENCY (Hz)
0
1E-2 1E-1 1E+0 1E+1 1E+2 1E+3
1
10
1k
0.01 0.1
100
FREQUENCY (Hz)
500
DROPOUT VOLTAGE (mV)
450
400
350
300
250
200
150
100
50
Dropout Voltage vs.
Temperature
3.0
OUTPUT VOLTAGE (V)
Dropout Characteristics
18
GROUND CURRENT (mA)
Ground Current
vs. Output Current
16
14
12
10
8
6
4
2
0
0
1000
1200
1400
1600
200
400
600
800
2.5V
OUT
2.5
2.0
1.5
1.0
0.5
0
1
1.5
2
2.5
3
INPUT VOLTAGE (V)
3.5
750mA
100mA
1.5A
2.5V
OUT
1.5V
OUT
0
-40 -20 0 20 40 60 80 100 120
TEMPERATURE (°C)
OUTPUT CURRENT (mA)
Ground Current
vs. Supply Voltage
1.4
45
GROUND CURRENT (mA)
Ground Current
vs. Supply Voltage
GROUND CURRENT (mA)
40
35
30
25
20
15
10
5
0
0
750mA
1
2
3
4
5
6
SUPPLY VOLTAGE (V)
1500mA
1000mA
V
OUT
= 2.5V
0.5
0.445
0.44
0.435
0.43
0.4
0.42
0.415
0.41
Ground Current
vs. Temperature
V
OUT
= 2.5V
I
LOAD
= 10mA
GROUND CURRENT (mA)
1.2
1
0.8
0.6
0.4
0.2
0
0
V
OUT
= 2.5V
100mA
10mA
1
2
3
4
5
SUPPLY VOLTAGE (V)
6
0.405
0.4
-40 -20 0 20 40 60 80 100 120
TEMPERATURE (°C)
7
GROUND CURRENT (mA)
GROUND CURRENT (mA)
6
5.0
4
3
2
1
V
OUT
= 2.5V
I
LOAD
= 750mA
16
14
12
10
8
6
V
OUT
=2.5V
I
LOAD
= 1.5A
SHORT CIRCUIT CURRENT (mA)
Ground Current
vs. Temperature
Ground Current
vs. Temperature
20
18
3.0
2.5
2.0
1.5
1.0
0.5
Short Circuit Current
vs. Temperature
0
-40 -20 0 20 40 60 80 100 120
TEMPERATURE (°C)
4
2
0
-40 -20 0 20 40 60 80 100 120
TEMPERATURE (°C)
0
-40 -20 0 20 40 60 80 100 120
TEMPERATURE (°C)
August 2003
5
MIC37150/37151/37152
模拟与混合信号
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