1A Low-Voltage Low-Dropout Regulator
FEATURES
Fixed and adjustable output voltages to 1.24V
470mV typical dropout at 1A
Ideal for 3.0V to 2.5V conversion
Ideal for 2.5V to 1.8V or 1.5V conversion
1A minimum guaranteed output current
1% initial accuracy
Low ground current
Current limiting and thermal shutdown
Reversed-battery protection
Reversed-leakage protection
Fast transient response
Moisture Sensitivity Level 3
LM37101/37102
SOP-8 PKG
TO-252 PKG
APPLICATION
Battery Powered Equipments
Motherboards and Graphic Cards
Microprocessor Power Supplies
Peripheral Cards
High Efficiency Linear Regulators
Battery Chargers
ORDERING INFORMATION
Device
LM37101D-X.X
LM37102D
LM37101RS-X.X
LM37102RS
Package
SOP-8
TO-252
X.X = Output Voltage = 1.5, 1.8, 2.5, 3.3, 5.0
DESCRIPTION
The LM37101/2 is 1A low-dropout linear voltage regulators that provide low-voltage, high-current output. The
LM37101/2 offers extremely low dropout (typically 470mV at 1A) and low ground current (typically 12mA at 1A).
The LM37101 and LM37102 are fixed and adjustable regulators, respectively, in SOP-8 and TO-252 Package.
The LM37101/2 is ideal for PC add-in cards that need to convert from standard 5V to 3.3V, 3.3V to 2.5V or 2.5V
to1.8V. A guaranteed maximum dropout voltage of 630mV overall operating conditions allows the LM37101/2 to
provide2.5V from a supply as low as 3.13V and 1.8V from a supply as low as 2.43V. The LM37101/2 is fully
protected with over current limiting, thermal shutdown, and reversed-battery protection. Fixed voltages of 5.0V,
3.3V, 2.5V, 1.8V and 1.5V are available on LM37101 with adjustable output voltages to 1.24V on LM37102.
Absolute Maximum Ratings
(Note 1)
CHARACTERISTIC
Supply Voltage
Enable Voltage
Output Voltage
Lead Temperature (Soldering, 5 sec)
Storage Temperature Range
SYMBOL
V
IN
V
EN
V
OUT
T
SOL
T
STG
MIN.
- 0.3
-
-0.3
-
-65
MAX.
+ 20
+ 20
V
IN
+0.3
260
+ 150
UNIT
V
V
V
℃
℃
Nov. 2011 – R1.1
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HTC
1A Low-Voltage Low-Dropout Regulator
Operating Ratings
(Note 2)
CHARACTERISTIC
Supply Voltage
Enable Voltage
Maximum Power Dissipation
Junction Temperature
Package Thermal Resistance
LM37101/37102
MIN.
+ 2.25
+ 2.25
0.77
0.952
-40
130
30
+ 125
SYMBOL
V
IN
V
EN
PD
(max-SOP8)
(Note 3)
PD
(max-TO-252)
(Note 3)
T
J
θ
JA-SOP-8
θ
JC-SOP-8
MAX.
+ 16
+ 16
UNIT
V
V
W
℃
℃/W
℃/W
Ordering Information
V
OUT
1.5V
Package
SOP-8
TO-252
SOP-8
TO-252
SOP-8
TO-252
SOP-8
TO-252
SOP-8
TO-252
SOP-8
TO-252
Order No.
LM37101D-1.5
LM37101RS-1.5
LM37101D-1.8
LM37101RS-1.8
LM37101D-2.5
LM37101RS-2.5
LM37101D-3.3
LM37101RS-3.3
LM37101D-5.0
LM37101RS-5.0
LM37102D
LM37102RS
Description
1A, Fixed, Enable
1A, Fixed, Enable
1A, Fixed, Enable
1A, Fixed, Enable
1A, Fixed, Enable
1A, Fixed, Enable
1A, Fixed, Enable
1A, Fixed, Enable
1A, Fixed, Enable
1A, Fixed, Enable
1A, Adjustable, Enable
1A, Adjustable, Enable
Supplied As
Reel
Reel
Reel
Reel
Reel
Reel
Reel
Reel
Reel
Reel
Reel
Reel
Status
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Active
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1.8V
2.5V
3.3V
5.0V
ADJ
TJ 3710X
Output Voltage : 1.5V / 1.8V / 2.5V / 3.3V / 5.0V / Blank(ADJ Only)
Package Type
D : SOP-8
RS : TO-252
37101 : Fixed Output
37102 : Adjustable Output
Root Name
Product Code
Nov. 2011 – R1.1
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2
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HTC
1A Low-Voltage Low-Dropout Regulator
LM37102 Only
Reference Voltage
V
REF
(Note 9)
LM37101/37102
1.228
1.215
1.203
40
1.24
1.252
1.265
1.277
80
120
V
V
V
nA
nA
ppm/ °C
99.2
nA/ °C
I
REF
ΔV
REF
/ΔT
ΔI
ADJ
/ΔT
Adjust Pin Bias
Current
Reference Voltage
Temp. Coefficient
(Note 4)
Adjust Pin Bias Current
Temp. Coefficient
20
0.1
Note 1. Exceeding the absolute maximum ratings may damage the device.
Note 2. The device is not guaranteed to function outside its operating rating.
Note 3. PD (max)= (T
J (max)
- T
A
) ÷
θ
JA
, where
θ
JA
-junction-to-ambient thermal resistance.
Note 4. Output voltage temperature coefficient is
ΔV
OUT
(worst case) ÷ (T
J(max)
- T
J(min)
) where T
J(max)
is +125°C and T
J(min)
is 0°C.
Note 5. V
DO
= V
IN
- V
OUT
when V
OUT
decreases to 99% of its nominal output voltage with V
IN
= V
OUT
+ 1V. For output voltages below 2.25V,
dropout voltage is the input-to-output voltage differential with the minimum input voltage being 2.25V. Minimum input operating voltage
is 2.25V.
Note 6. I
GND
is the quiescent current. I
IN
= I
GND
+ I
OUT.
Note 7. Delay time is measured after V
EN
=V
IN
.
C
IN
=C
OUT
=10
μ
F.
Note 8. For adjustable device and fixed device with V
OUT
≥
2.5V
Note 9. V
REF
≤
V
OUT
≤
(V
IN
- 1V), 2.25V
≤
V
IN
≤
16V, 10mA
≤
I
L
≤
1 A.
Nov. 2011 – R1.1
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5
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HTC
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