4

LM337L

SNVS780E – MAY 1998 – REVISED DECEMBER 2016

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Copyright © 1998–2016, Texas Instruments Incorporated

(1)

For more information about traditional and new thermal metrics, see the Semiconductor and IC Package Thermal Metrics application

report.

6.4 Thermal Information

THERMAL METRIC(1)

LM337L

UNIT

D (SOIC)

LP (TO-92)

8 PINS

3 PINS

RθJA

Junction-to-ambient thermal resistance

111.3

156.9

°C/W

RθJC(top)

Junction-to-case (top) thermal resistance

56.1

80.2

°C/W

RθJB

Junction-to-board thermal resistance

51.9

—

°C/W

ψJT

Junction-to-top characterization parameter

10.6

24.7

°C/W

ψJB

Junction-to-board characterization parameter

51.3

136.2

°C/W

(1)

Unless otherwise specified, these specifications apply –25°C

≤ TJ ≤ 125°C for the LM337L; |VIN – VOUT| = 5 V and IOUT = 40 mA.

Although power dissipation is internally limited, these specifications are applicable for power dissipations up to 625 mW. IMAX is 100 mA.

(2)

Regulation is measured at constant junction temperature, using pulse testing with a low duty cycle. Changes in output voltage due to

heating effects are covered under the specification for thermal regulation.

6.5 Electrical Characteristics

(1)

PARAMETER

TEST CONDITIONS

MIN

TYP

MAX

UNIT

Line regulation(2)

TA = 25°C, 3 V ≤ |VIN – VOUT| ≤ 40 V

0.01

0.04

%/V

Load regulation(2)

TA = 25°C, 5 mA ≤ IOUT ≤ IMAX

0.1%

0.5%

Thermal regulation

TA = 25°C, 10-ms Pulse

0.04

0.2

%/W

Adjustment pin current

50

100

μA

Adjustment pin current change

5 mA

≤ IL ≤ 100 mA, 3 V ≤ |VIN – VOUT| ≤ 40 V

0.2

5

μA

Reference voltage

3 V

≤ |VIN – VOUT| ≤ 40 V, 10 mA ≤ IOUT ≤ 100 mA, P ≤

625 mW

1.2

1.25

1.3

V

Line regulation(2)

3 V

≤ |VIN – VOUT| ≤ 40 V

0.02

0.07

%/V

Load regulation(2)

5 mA

≤ IOUT ≤ 100 mA

0.3%

1.5%

Temperature stability

TMIN ≤ Tj ≤ TMAX

0.65%

Minimum load current

|VIN – VOUT| ≤ 40 V

3.5

5

mA

3 V

≤ |VIN – VOUT| ≤ 15 V

2.2

3.5

mA

Current limit

3 V

≤ |VIN – VOUT| ≤ 13 V

100

200

320

mA

|VIN – VOUT| = 40 V

25

50

120

mA

RMS output noise, % of VOUT

TA = 25°C, 10 Hz ≤ f ≤ 10 kHz

0.003%

Ripple rejection ratio

VOUT = –10 V, F = 120 Hz, CADJ = 0

65

dB

CADJ = 10 μF

66

80

dB

Long-term stability

TA = 125°C

0.3%

1%