LM120HG-5 MD8 National Semiconductor, LM120HG-5 MD8 Datasheet

LM120HG-5 MD8

Manufacturer Part Number

LM120HG-5 MD8

Description

LM120/LM320 Series 3-Terminal Negative Regulators; ; Container: Tray

Manufacturer

National Semiconductor

Datasheet

1.LM120HG-5_MD8.pdf (20 pages)

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LM120/LM320

Series 3-Terminal Negative Regulators

General Description

The LM120 series are three-terminal negative regulators with

a fixed output voltage of −5V, −12V, and −15V, and up to 1.5A

load current capability. Where other voltages are required, the

LM137 and LM137HV series provide an output voltage range

of −1.2V to −47V.

The LM120 need only one external component—a compen-

sation capacitor at the output, making them easy to apply.

Worst case guarantees on output voltage deviation due to any

combination of line, load or temperature variation assure sat-

isfactory system operation.

Exceptional effort has been made to make the LM120 Series

immune to overload conditions. The regulators have current

limiting which is independent of temperature, combined with

thermal overload protection. Internal current limiting protects

against momentary faults while thermal shutdown prevents

junction temperatures from exceeding safe limits during pro-

longed overloads.

Although primarily intended for fixed output voltage applica-

tions, the LM120 Series may be programmed for higher out-

put voltages with a simple resistive divider. The low quiescent

Typical Applications

Dual Trimmed Supply

7767

776703

drain current of the devices allows this technique to be used

with good regulation.

Features

■

*Required if regulator is separated from filter capacitor by more than 3 inch-

es. For value given, capacitor must be solid tantalum. 25 μF aluminum

electrolytic may be substituted.

†Required for stability. For value given, capacitor must be solid tantalum. 25

μF aluminum electrolytic may be substituted. Values given may be increased

without limit.

For output capacitance in excess of 100 μF, a high current diode from input

to output (1N4001, etc.) will protect the regulator from momentary input

shorts.

LM120/LM320 TO-3 (K)

LM320

Preset output voltage error less than ±3%

Preset current limit

Internal thermal shutdown

Operates with input-output voltage differential down to 1V

Excellent ripple rejection

Low temperature drift

Easily adjustable to higher output voltage

Device

LM120 Series Packages and Power Capability

TO-39 (H)

TO-220 (T)

Package

Fixed Regulator

Dissipation

Power

Rated

20W

15W

November 15, 2007

www.national.com

776702

Current

Design

Load

1.5A

0.5A

1.5A

Related parts for LM120HG-5 MD8

LM120HG-5 MD8 Summary of contents

Page 1

... LM120 Series may be programmed for higher out- put voltages with a simple resistive divider. The low quiescent Typical Applications Dual Trimmed Supply © 2007 National Semiconductor Corporation drain current of the devices allows this technique to be used with good regulation. Features ■ ...

Page 2

... Absolute Maximum Ratings −5 Volt Regulators (Notes Military/Aerospace specified devices are required, please contact the National Semiconductor Sales Office/ Distributors for availability and specifications. Power Dissipation Input Voltage −5 Volt Regulators Electrical Characteristics Order Numbers Design Output Current (I Device Dissipation (P ...

Page 3

Volt Regulators Electrical Characteristics Order Numbers Design Output Current (I Device Dissipation (P Parameter Conditions (Note 1) Output Voltage T = 25° LOAD Line Regulation T = 25° ≤ ...

Page 4

Volt Regulators Electrical Characteristics Order Numbers Design Output Current (I Device Dissipation (P Parameter Output Voltage T = 25° LOAD Line Regulation T = 25° MIN Input Voltage Ripple Rejection f = 120 ...

Page 5

... Absolute Maximum Ratings −12 Volt Regulators (Note 9) If Military/Aerospace specified devices are required, please contact the National Semiconductor Sales Office/ Distributors for availability and specifications. Power Dissipation Input Voltage −12 Volt Regulators Electrical Characteristics Order Numbers Design Output Current (I Device Dissipation (P ...

Page 6

Order Numbers Design Output Current (I Device Dissipation (P Parameter Conditions (Note 6) Input Voltage Ripple Rejection f = 120 Hz Load Regulation 25° ≤ (Note LOAD ≤ Output Voltage, 14.5V V ...

Page 7

Order Numbers Design Output Current (I Device Dissipation (P Parameter Thermal Resistance Junction to Case Junction to Ambient Note 6: This specification applies over −55°C Note 7: Regulation is measured at constant junction temperature. Changes in output voltage due to ...

Page 8

... Absolute Maximum Ratings −15 Volt Regulators (Note 13) If Military/Aerospace specified devices are required, please contact the National Semiconductor Sales Office/ Distributors for availability and specifications. Power Dissipation Input Voltage −15 Volt Regulators Electrical Characteristics Order Numbers Design Output Current (I Device Dissipation (P ...

Page 9

Order Numbers Design Output Current (I Device Dissipation (P Parameter Conditions (Note 10) Input Voltage Ripple Rejection f = 120 Hz Load Regulation 25° ≤ (Note 11 LOAD ≤ Output Voltage, 17.5V V ...

Page 10

Order Numbers Design Output Current (I Device Dissipation (P Parameter Thermal Resistance Junction to Case Junction to Ambient Note 10: This specification applies over −55°C Note 11: Regulation is measured at constant junction temperature. Changes in output voltage due to ...

Page 11

Minimum Input-Output Differential TO-3 and TO-220 Packages Quiescent Current vs Input Voltage Maximum Average Power Dissipation (TO-3) *These curves for LM120. Derate 25°C further for LM320. Maximum Average Power Dissipation (TO-202) 776724 776726 Maximum Average Power 776728 Maximum Average Power ...

Page 12

Short Circuit Current www.national.com 776732 12 ...

Page 13

Typical Applications Lead and line regulation — 0.01% temperature stability — 0.2% †Determines Zener current. ††Solid tantalum. An LM120-12 or LM120-15 may be used to permit higher input voltages, but the regulated output voltage must be at least −15V when ...

Page 14

Amp Tracking Regulators Light Controllers Using Silicon Photo Cells *Lamp brightness increases until i = 5V/ †Necessary only if raw supply filter capacitor is more than 2 inches from LM320MP. www.national.com Load Regulation at ΔI Output ...

Page 15

Connection Diagrams Bottom View Steel Metal Can Package TO-3 (K) Order Number LM120K-5.0/883, LM120K-12/883, LM120K-15/883, LM320K-5.0, LM320K-12 or LM320K-15 See NS Package Number K02A Bottom View Metal Can Package TO-39 (H) Order Number LM120H-5.0, LM120H-12, LM120H-15, LM120H-5.0/883, LM120H-12/883, LM120H-15/883, LM320H-5.0, ...

Page 16

Schematic Diagrams www.national.com −5V −12V and −15V 16 776718 776719 ...

Page 17

Physical Dimensions inches (millimeters) unless otherwise noted Order Number LM120H-5.0, LM120H-12, LM120H-15, LM320H-5.0, LM320H-12 or LM320H-15 Metal Can Package (TO-39) (H) NS Package Number H03A 17 www.national.com ...

Page 18

Order Number LM120K-5.0, LM120K-12, LM120K-15, LM320K-5.0, LM320K-12 or LM320K-15 www.national.com Steel Metal Can Package TO-3 (K) NS Package Number K02A Power Package TO-220 (T) Order Number LM320T-5.0, LM320T-12 or LM320T-15 NS Package Number T03B 18 ...

Page 19

Notes 19 www.national.com ...

Page 20

... For more National Semiconductor product information and proven design tools, visit the following Web sites at: Products Amplifiers www.national.com/amplifiers Audio www.national.com/audio Clock Conditioners www.national.com/timing Data Converters www.national.com/adc Displays www.national.com/displays Ethernet www.national.com/ethernet Interface www.national.com/interface LVDS www.national.com/lvds Power Management www.national.com/power Switching Regulators www.national.com/switchers LDOs www ...

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