LM337

2

MOTOROLA ANALOG IC DEVICE DATA

MAXIMUM RATINGS

Rating

Symbol

Value

Unit

Input–Output Voltage Differential

VI–VO

40

Vdc

Power Dissipation

Case 221A

TA = +25°C

PD

Internally Limited

W

Thermal Resistance, Junction–to–Ambient

θJA

65

°C/W

Thermal Resistance, Junction–to–Case

θJC

5.0

°C/W

Case 936 (D2PAK)

TA = +25°C

PD

Internally Limited

W

Thermal Resistance, Junction–to–Ambient

θJA

70

°C/W

Thermal Resistance, Junction–to–Case

θJC

5.0

°C/W

Operating Junction Temperature Range

TJ

– 40 to +125

°C

Storage Temperature Range

Tstg

– 65 to +150

°C

Characteristics

Figure

Symbol

Min

Typ

Max

Unit

Line Regulation (Note 3), TA = +25°C, 3.0 V ≤ |VI–VO| ≤ 40 V

1

Regline

–

0.01

0.04

%/V

Load Regulation (Note 3), TA = +25°C, 10 mA ≤ IO ≤ Imax

|VO| ≤ 5.0 V

|VO| ≥ 5.0 V

2

Regload

–

–

15

0.3

50

1.0

mV

% VO

Thermal Regulation, TA = +25°C (Note 6), 10 ms Pulse

Regtherm

–

0.003

0.04

% VO/W

Adjustment Pin Current

3

IAdj

–

65

100

µA

Adjustment Pin Current Change, 2.5 V

≤ |VI–VO| ≤ 40 V,

10 mA

≤ IL ≤ Imax, PD ≤ Pmax, TA = +25°C

1, 2

∆IAdj

–

2.0

5.0

µA

Reference Voltage, TA = +25°C, 3.0 V ≤ |VI–VO| ≤ 40 V,

10 mA

≤ IO ≤ Imax, PD ≤ Pmax, TJ = Tlow to Thigh

3

Vref

–1.213

–1.20

–1.250

–1.25

–1.287

–1.30

V

Line Regulation (Note 3), 3.0 V

≤ |VI–VO| ≤ 40 V

1

Regline

–

0.02

0.07

%/V

Load Regulation (Note 3), 10 mA

≤ IO ≤ Imax

|VO| ≤ 5.0 V

|VO| ≥ 5.0 V

2

Regload

–

–

20

0.3

70

1.5

mV

% VO

Temperature Stability (Tlow ≤ TJ ≤ Thigh)

3

TS

–

0.6

–

% VO

Minimum Load Current to Maintain Regulation

(|VI–VO| ≤ 10 V)

(|VI–VO| ≤ 40 V)

3

ILmin

–

–

1.5

2.5

6.0

10

mA

Maximum Output Current

|VI–VO| ≤ 15 V, PD ≤ Pmax, T Package

|VI–VO| ≤ 40 V, PD ≤ Pmax, TJ = +25°C, T Package

3

Imax

–

–

1.5

0.15

2.2

0.4

A

RMS Noise, % of VO, TA = +25°C, 10 Hz ≤ f ≤ 10 kHz

N

–

0.003

–

% VO

Ripple Rejection, VO = –10 V, f = 120 Hz (Note 4)

Without CAdj

CAdj = 10 µF

4

RR

–

66

60

77

–

–

dB

Long–Term Stability, TJ = Thigh (Note 5), TA = +25°C for

Endpoint Measurements

3

S

–

0.3

1.0

%/1.0 k

Hrs.

Thermal Resistance Junction–to–Case, T Package

R

θJC

–

4.0

–

°C/W

NOTES: 1. Tlow to Thigh = 0° to +125°C, for LM337T, D2T.

Tlow to Thigh = – 40° to +125°C, for LM337BT, BD2T.

2. Imax = 1.5 A, Pmax = 20 W

3. Load and line regulation are specified at constant junction temperature. Change in VO because of heating effects is covered under the Thermal

Regulation specification. Pulse testing with a low duty cycle is used.

4. CAdj, when used, is connected between the adjustment pin and ground.

5. Since Long Term Stability cannot be measured on each device before shipment, this specification is an engineering estimate of average stability from

lot to lot.

6. Power dissipation within an IC voltage regulator produces a temperature gradient on the die, affecting individual IC components on the die. These

effects can be minimized by proper integrated circuit design and layout techniques. Thermal Regulation is the effect of these temperature gradients

on the output voltage and is expressed in percentage of output change per watt of power change in a specified time.