LM237 datasheet(3/17 Pages) TI

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Recommended Operating Conditions

Electrical Characteristics

LM237, LM337

3-TERMINAL ADJUSTABLE REGULATORS

SLVS047J – NOVEMBER 1981 – REVISED MAY 2007

MIN

MAX

UNIT

|VI – VO| ≤ 40 V, P ≤ 15 W

1500

Output current

|VI – VO| ≤ 10 V, P ≤ 15 W

1500

LM237

–25

150

Operating virtual junction temperature

°C

LM337

125

over recommended ranges of operating virtual junction temperature (unless otherwise noted)

LM237

LM337

PARAMETER

TEST CONDITIONS(1)

UNIT

MIN

TYP

MAX

MIN

TYP

MAX

TJ = 25°C

0.01

0.02

0.01

0.04

Input regulation(2)

VI – VO = –3 V to –40 V

%/V

TJ = MIN to MAX

0.02

0.05

0.02

0.07

VO = –10 V, f = 120 Hz

Ripple rejection

VO = –10 V, f = 120 Hz, CADJ = 10 µF

|VO| ≤ 5 V

IO = 10 mA to 1.5 A,

TJ = 25°C

|VO| ≥ 5 V

0.3

0.5

0.3

Output regulation

|VO| ≤ 5 V

IO = 10 mA to 1.5 A

|VO| ≥ 5 V

1.5

Output-voltage change

TJ = MIN to MAX

0.6

with temperature

Output-voltage

After 1000 h at TJ = MAX and VI – VO = –40 V

0.3

long-term drift

Output noise voltage

f = 10 Hz to 10 kHz, TJ = 25°C

0.003

|VI – VO| ≤ 40 V

2.5

Minimum output current to

maintain regulation

|VI – VO| ≤ 10 V

1.2

1.5

|VI – VO| ≤ 15 V

1.5

2.2

1.5

2.2

Peak output current

|VI – VO| ≤ 40 V, TJ = 25°C

0.24

0.4

0.15

0.4

ADJUSTMENT current

100

µA

Change in ADJUSTMENT

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

µA

current

TJ = 25°C

Reference voltage

VI – VO = –3 V to –40 V,

TJ = 25°C

–1.225

–1.25 –1.275 –1.213

–1.25 –1.287

(OUTPUT to

IO = 10 mA to 1.5 A,

TJ = MIN to MAX

–1.2

–1.25

–1.3

–1.2

–1.25

–1.3

ADJUSTMENT)

≤ rated dissipation

Thermal regulation

Initial TJ = 25°C, 10-ms pulse

0.002

0.02

0.003

0.04

%/W

(1)

Unless otherwise noted, the following test conditions apply: |VI – VO| = 5 V and IO = 0.5 A. For conditions shown as MIN or MAX, use

the appropriate value specified under recommended operating conditions. 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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