LM337 datasheet(4/17 Pages) TI

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Electrical Characteristics

LM237, LM337

3-TERMINAL ADJUSTABLE REGULATORS

SLVS047J – NOVEMBER 1981 – REVISED MAY 2007

J = 25°C

LM237, LM337

PARAMETER

TEST CONDITIONS(1)

UNIT

MIN

TYP

MAX

Input regulation(2)

VI – VO = –3 V to –40 V

0.01

0.04

%/V

VO = –10 V, f = 120 Hz

Ripple rejection

VO = –10 V, f = 120 Hz, CADJ = 10 µF

|VO| ≤ 5 V

Output regulation

IO = 10 mA to 1.5 A

|VO| ≥ 5 V

0.3

Output noise voltage

f = 10 Hz to 10 kHz

0.003

|VI – VO| ≤ 40 V

2.5

Minimum output current to maintain

regulation

|VI – VO| ≤ 10 V

1.5

|VI – VO| ≤ 15 V

1.5

2.2

Peak output current

|VI – VO| ≤ 40 V

0.15

0.4

ADJUSTMENT current

100

µA

Change in ADJUSTMENT current

VI – VO = –2.5 V to –40 V, IO = 10 mA to MAX

µA

Reference voltage

VI – VO = –3 V to –40 V, IO = 10 mA to 1.5 A,

–1.213

–1.25

–1.287

(OUTPUT to ADJUSTMENT)

≤ rated dissipation

(1)

Unless otherwise noted, the following test conditions apply: |VI – VO| = 5 V and IO = 0.5 A. All characteristics are measured with a

0.1-

µF capacitor across the input and a 1-µF capacitor across the output. Pulse-testing techniques are used to maintain the junction

temperature as close to the ambient temperature as possible. Thermal effects must be taken into account separately.

(2)

Input regulation is expressed here as the percentage change in output voltage per 1-V change at the input.

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