LM237, LM337

3-TERMINAL ADJUSTABLE REGULATORS

SLVS047G – NOVEMBER 1981 – REVISED SEPTEMBER 2003

3

POST OFFICE BOX 655303

electrical characteristics over recommended ranges of operating virtual junction temperature

(unless otherwise noted)

PARAMETER

TEST CONDITIONS†

LM237

LM337

UNIT

PARAMETER

TEST CONDITIONS†

MIN

TYP

MAX

MIN

TYP

MAX

UNIT

Input regulation‡

VI – VO = –3 V to –40 V

TJ = 25°C

0.01

0.02

0.01

0.04

%/V

Input regulation‡

VI – VO = –3 V to –40 V

TJ = MIN to MAX

0.02

0.05

0.02

0.07

%/V

Ripple rejection

VO = –10 V,

60

60

dB

Ripple rejection

VO = –10 V,

CADJ = 10 µF

66

77

66

77

dB

Output regulation

IO = 10 mA to 1.5 A,

|VO| ≤ 5 V

25

50

mV

Output regulation

IO = 10 mA to 1.5 A,

TJ = 25°C

|VO| ≥ 5 V

0.3%

0.5%

0.3%

1%

Output regulation

IO = 10 mA to 1.5 A

|VO| ≤ 5 V

50

70

mV

IO = 10 mA to 1.5 A

|VO| ≥ 5 V

1%

1.5%

Output-voltage

change with

temperature

TJ = MIN to MAX

0.6%

0.6%

Output-voltage

long-term drift

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

0.3%

1%

0.3%

1%

Output noise

voltage

TJ = 25°C

0.003%

0.003%

Minimum output

current to maintain

|VI – VO| ≤ 40 V

2.5

5

2.5

10

mA

current to maintain

regulation

|VI – VO| ≤ 10 V

1.2

3

1.5

6

mA

Peak output current

|VI – VO| ≤ 15 V

1.5

2.2

1.5

2.2

A

Peak output current

|VI – VO| ≤ 40 V,

TJ = 25°C

0.24

0.4

0.15

0.4

A

Adjustment-terminal

current

65

100

65

100

µA

Change in

adjustment-terminal

current

VI – VO = – 2.5 V to –40 V,

IO = 10 mA to MAX

TJ = 25°C,

2

5

2

5

µA

Reference voltage

VI – VO = – 3 V to –40 V,

IO = 10 mA to 1.5 A,

TJ = 25°C

–1.225

–1.25

–1.275

–1.213

–1.25

–1.287

V

Reference voltage

(output to ADJ)

IO = 10 mA to 1.5 A,

P

≤ rated dissipation

TJ = MIN to MAX

–1.2

–1.25

–1.3

–1.2

–1.25

–1.3

V

Thermal regulation

Initial TJ = 25°C,

10-ms pulse

0.002

0.02

0.003

0.04

%/W

† Unless otherwise noted, these specifications apply for the following test conditions |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.

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