LM237, LM337

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SLVS047L – NOVEMBER 1981 – REVISED JANUARY 2015

7.5

Electrical Characteristics

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

60

60

Ripple rejection

dB

VO = –10 V, f = 120 Hz, CADJ = 10 μF

66

77

66

77

|VO| ≤ 5 V

25

50

mV

IO = 10 mA to 1.5 A,

TJ = 25°C

|VO| ≥ 5 V

0.3%

0.5%

0.3%

1%

—

Output regulation

|VO| ≤ 5 V

50

70

mV

IO = 10 mA to 1.5 A

|VO| ≥ 5 V

1%

1.5%

—

Output-voltage change with

TJ = MIN to MAX

0.6%

0.6%

—

temperature

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

f = 10 Hz to 10 kHz, TJ = 25°C

0.003%

0.003%

—

|VI – VO| ≤ 40 V

2.5

5

2.5

10

Minimum output current to

mA

maintain regulation

|VI – VO| ≤ 10 V

1.2

3

1.5

6

|VI – VO| ≤ 15 V

1.5

2.2

1.5

2.2

Peak output current

A

|VI – VO| ≤ 40 V, TJ = 25°C

0.24

0.4

0.15

0.4

ADJUSTMENT current

65

100

65

100

μA

Change in ADJUSTMENT

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

2

5

2

5

μA

current

TJ = 25°C

VI – VO = –3 V to –40 V,

TJ = 25°C

–1.225

–1.25

–1.275

–1.213

–1.25

–1.287

Reference voltage (OUTPUT

IO = 10 mA to 1.5 A,

V

to ADJUSTMENT)

TJ = MIN to MAX

–1.2

–1.25

–1.3

–1.2

–1.25

–1.3

P

≤ 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.

7.6

Electrical Characteristics

TJ = 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

60

Ripple rejection

dB

VO = –10 V, f = 120 Hz, CADJ = 10 μF

66

77

|VO| ≤ 5 V

50

mV

Output regulation

IO = 10 mA to 1.5 A

|VO| ≥ 5 V

0.3%

1%

—

Output noise voltage

f = 10 Hz to 10 kHz

0.003%

—

|VI – VO| ≤ 40 V

2.5

10

Minimum output current to maintain

mA

regulation

|VI – VO| ≤ 10 V

1.5

6

|VI – VO| ≤ 15 V

1.5

2.2

Peak output current

A

|VI – VO| ≤ 40 V

0.15

0.4

ADJUSTMENT current

65

100

μA

Change in ADJUSTMENT current

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

2

5

μA

Reference voltage

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

–1.213

–1.25

–1.287

V

(OUTPUT to ADJUSTMENT)

P

≤ 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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