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LM137

LM337-N

SNVS778E –MAY 1999–REVISED JANUARY 2016

LM137, LM337-N 3-Terminal Adjustable Negative Regulators

1 Features 3 Description

The LM137 and LM337-N are adjustable 3-terminal

• 1.5-A Output Current

negative voltage regulators capable of supplying

• Line Regulation 0.01%/V (Typical)

−1.5 A or more currents over an output voltage range

• Load Regulation 0.3% (Typical)

of −1.25 V to −37 V. It requires only two external

resistors to set the output voltage and one output

• 77-dB Ripple Rejection

capacitor for frequency compensation. The circuit

• 50 ppm/°C Temperature Coefficient

design has been optimized for excellent regulation

• Thermal Overload Protection

and low thermal transients. Further, the LM137 and

LM337-N feature internal current limiting, thermal

• Internal Short-Circuit Current Limiting Protections

shutdown and safe-area compensation, making it

virtually blowout-proof against overloads.

2 Applications

The LM137 and LM337-N are ideal complements to

• Industrial Power Supplies

the LM117 and LM317 adjustable positive regulators.

• Factory Automation Systems

The LM137 has a wider operating temperature range

• Building Automation Systems

than the LM337-N and is also offered in military and

• PLC Systems space qualified versions.

• Instrumentation

Device Information

(1)

• IGBT Drive Negative Gate Supplies

PART NUMBER PACKAGE BODY SIZE (NOM)

• Networking

LM137 TO (3) 8.255 mm × 8.255 mm

• Set-Top Boxes

SOT-223 (4) 3.50 mm × 6.50 mm

LM337-N TO (3) 8.255 mm × 8.255 mm

TO-220 (3) 10.16 mm × 14.986 mm

(1) For all available packages, see the orderable addendum at

the end of the data sheet. The LF01 is a lead formed (bent)

version of the TO-220 package.

Adjustable Negative Voltage Regulator

Full output current not available at high input-output voltages

†C1 = 1-μF solid tantalum or 10-μF aluminum electrolytic required for stability

*C2 = 1-μF solid tantalum is required only if regulator is more than 4″ from power-supply filter capacitor

Output capacitors in the range of 1-μF to 1000-μF of aluminum or tantalum electrolytic are commonly used to provide

improved output impedance and rejection of transients

An IMPORTANT NOTICE at the end of this data sheet addresses availability, warranty, changes, use in safety-critical applications,

intellectual property matters and other important disclaimers. PRODUCTION DATA.

LM137

LM337-N

SNVS778E –MAY 1999–REVISED JANUARY 2016

www.ti.com

Table of Contents

1 Features.................................................................. 1 8 Application and Implementation ........................ 12

8.1 Application Information............................................ 12

2 Applications ........................................................... 1

8.2 Typical Applications ................................................ 12

3 Description ............................................................. 1

9 Power Supply Recommendations...................... 16

4 Revision History..................................................... 2

10 Layout................................................................... 16

5 Pin Configuration and Functions......................... 3

10.1 Layout Guidelines ................................................. 16

6 Specifications......................................................... 4

10.2 Layout Example .................................................... 16

6.1 Absolute Maximum Ratings ...................................... 4

10.3 Thermal Considerations........................................ 17

6.2 ESD Ratings.............................................................. 4

11 Device and Documentation Support ................. 18

6.3 Recommended Operating Conditions....................... 4

11.1 Documentation Support ........................................ 18

6.4 Thermal Information.................................................. 4

11.2 Related Links ........................................................ 18

6.5 Electrical Characteristics........................................... 5

11.3 Community Resources.......................................... 18

6.6 Typical Characteristics.............................................. 6

11.4 Trademarks........................................................... 18

7 Detailed Description .............................................. 8

11.5 Electrostatic Discharge Caution............................ 18

7.1 Overview ................................................................... 8

11.6 Glossary................................................................ 18

7.2 Functional Block Diagram ......................................... 8

12 Mechanical, Packaging, and Orderable

7.3 Feature Description................................................... 8

Information ........................................................... 18

7.4 Device Functional Modes........................................ 10

4 Revision History

Changes from Revision D (April 2013) to Revision E Page

• Added ESD Ratings table, Feature Description section, Device Functional Modes, Application and Implementation

section, Power Supply Recommendations section, Layout section, Device and Documentation Support section, and

Mechanical, Packaging, and Orderable Information section. ................................................................................................. 1

• Deleted soldering information from Absolute Maximum Ratings ........................................................................................... 4

Changes from Revision C (April 2013) to Revision D Page

• Changed layout of National Data Sheet to TI format ............................................................................................................. 7

Product Folder Links: LM137 LM337-N

LM137

LM337-N

www.ti.com

SNVS778E –MAY 1999–REVISED JANUARY 2016

6.5 Electrical Characteristics

Unless otherwise specified, these specifications apply −55°C ≤ T

≤ 150°C for the LM137, 0°C ≤ T

≤ 125°C for the LM337-N;

− V

OUT

= 5 V; and I

OUT

= 0.1 A for the TO package and I

OUT

= 0.5 A for the SOT-223 and TO-220 packages. Although

power dissipation is internally limited, these specifications are applicable for power dissipations of 2 W for the TO and SOT-

223, and 20 W for the TO-220. I

MAX

is 1.5 A for the SOT-223 and TO-220 packages, and 0.2 A for the TO package.

LM137 LM337-N

PARAMETER TEST CONDITIONS UNIT

MIN TYP MAX MIN TYP MAX

= 25°C, 3 V ≤ |V

− V

OUT

| ≤ 40 V

(1)

Line regulation 0.01 0.02 0.01 0.04 %/V

= 10 mA

Load regulation T

= 25°C, 10 mA ≤ I

OUT

≤ I

MAX

0.3% 0.5% 0.3% 1%

Thermal regulation T

= 25°C, 10-ms Pulse 0.002 0.02 0.003 0.04 %/W

Adjustment pin current 65 100 65 100 μA

10 mA ≤ I

≤ I

MAX

Adjustment pin current charge 3 V ≤ |V

− V

OUT

| ≤ 40 V, 2 5 2 5 μA

= 25°C

(2)

−1.225 −1.25 −1.275 −1.213 −1.25 −1.287 V

3 V ≤ |V

− V

OUT

| ≤ 40 V,

(2)

Reference voltage

10 mA ≤ I

OUT

≤ I

MAX

, P ≤ P

MAX

−55°C ≤ T

≤ 150°C −1.2 −1.25 −1.3 −1.2 −1.25 −1.3 V

Line regulation 3 V ≤ |V

− V

OUT

| ≤ 40 V,

(1)

0.02 0.05 0.02 0.07 %/V

Load regulation 10 mA ≤ I

OUT

≤ I

MAX

(1)

0.3% 1% 0.3% 1.5%

Temperature stability T

MIN

≤ T

MAX

0.6% 0.6%

− V

OUT

| ≤ 40 V 2.5 5 2.5 10 mA

Minimum load current

− V

OUT

| ≤ 10 V 1.2 3 1.5 6 mA

K, DCY and NDE

1.5 2.2 3.5 1.5 2.2 3.7 A

package

− V

OUT

| ≤ 15 V

NDT package 0.5 0.8 1.8 0.5 0.8 1.9 A

Current limit

K, DCY and NDE

0.24 0.4 0.15 0.4 A

package

− V

OUT

| = 40 V, T

= 25°C

NDT package 0.15 0.17 0.1 0.17 A

RMS output noise, % of V

OUT

= 25°C, 10 Hz ≤ f ≤ 10 kHz 0.003% 0.003%

OUT

= −10 V, f = 120 Hz 60 60 dB

Ripple rejection ratio

ADJ

= 10 μF 66 77 66 77 dB

Long-term stability T

= 125°C, 1000 Hours 0.3% 1% 0.3% 1%

(1) 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. Load regulation is measured on the output pin at a point ⅛ in.

below the base of the TO packages.

(2) Selected devices with tightened tolerance reference voltage available.

Product Folder Links: LM137 LM337-N

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