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LM2937
(Rev.:2011)

500mA LOW DROPOUT VOLTAGE REGULATOR

Unisonic Technologies 

LM2937

LINEAR INTEGRATED CIRCUIT

„ ABSOLUTE MAXIMUM RATINGS (Note 1)

PARAMETER

SYMBOL

RATINGS

UNIT

Input Voltage

VIN

26

V

Power Dissipation(Note 2)

PD

Internally limited

Maximum Junction Temperature

TJ

+150

°C

Storage Temperature

TSTG

-40 ~ +150

°C

Note 1. Absolute Maximum Ratings indicate limits beyond which damage to the device may occur. Electrical

Specifications do not apply when operating the device outside of its rated Operating Conditions.

2. The maximum allowable power dissipation at any ambient temperature is PMAX = (125-TA)/ θJA, where 125 is

the maximum junction temperature for operation, TA is the ambient temperature, and θJA is the junction to

ambient thermal resistance. If this dissipation is exceeded, the die temperature will rise above 125°C and

the electrical specifications do not apply. If the die temperature rises above 150°C, the LM2937 will go into

thermal shutdown.

„ THERMAL DATA

Junction to Ambient

Junction to Case

PARAMETER

TO-220

TO-263/ TO-263-5

TO-220

TO-263/ TO-263-5

SYMBOL

θJA

θJC

RATINGS

65

73

3

4

„ ELECTRICAL CHARACTERISTICS

(VIN=VNOM+5V, IOUT=500mA, COUT=10μF, TJ=Ta=25°C, unless otherwise specified.)

For LM2937-3.3V

PARAMETER

SYMBOL

TEST CONDITIONS

MIN

Output Voltage

Line Regulation

Load Regulation

VOUT

△VOUT

△VOUT

5mA≤IOUT≤500mA

VOUT+2V≤VIN≤26V, IOUT=5mA

5mA≤IOUT≤500mA

3.21

Quiescent Current

IQ

(VO+2V)≤VIN ≤26V, IOUT=5mA

VIN= VOUT+5V, IOUT=500mA

Output Noise Voltage

eN

10Hz-100kHz, IOUT=5mA

Long Term Stability

1000Hrs

Dropout Voltage

VD

IOUT=500mA

IOUT=50mA

Short Circuit Current

ISC

0.6

Peak Line Transient Voltage

TIN

tF≤100ms, RL=100Ω

60

Reverse DC Input Voltage

VRIN VOUT ≥-0.6V, RL=100Ω

-15

Reverse Transient Input Voltage

VTRRI tF<1ms, RL=100Ω

-50

TYP

3.30

9

3

2

10

100

12

0.5

110

1.0

75

-30

-75

UNIT

°C/W

MAX

3.39

30

30

10

20

1.0

250

UNIT

V

mV

mV

mA

mA

μVrms

mV

V

mV

A

V

V

V

UNISONIC TECHNOLOGIES CO., LTD

www.unisonic.com.tw

3 of 10

QW-R102-012.G

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