CYStech Electronics Corp.

Spec. No. : C508M3

Issued Date : 2006.07.12

Revised Date : 2013.08.12

Page No. : 1/8

LM79LXXM3

CYStek Product Specification

Low Current Negative Voltage Regulator

LM79LXXM3

Description

The LM79LXXM3 series of negative regulators are available in the SOT-89 package and with -5V, -6V, -8V,-9V,

-12V, -15V, -18V and -24V fixed output voltages, making it useful in a wide range of applications. These regulators

can provide local on-card regulation, eliminating the distribution problems associated with single point regulation.

Each type employs internal current limiting, thermal shut-down and safe operating area protection, making it

essentially indestructible. If adequate heat sinking is provided, they can deliver over 100mA output current.

Although designed primarily as fixed voltage regulators, these devices can be used with external components to

obtain adjustable voltages and currents. LM79LXXM3 is characterized for operation from 0℃ to 125℃.

Features:

• Internal Short-Circuit Current Limiting

• Internal Thermal Overload Protection

• No External Components Required

• Pb-free lead plating package

Typical Application

Representative Schematic Diagram

LM79LXX

Vout

Vin

1

3

2

C1

0.33μF

C2

0.1μF

A common ground is required between the

input and the output voltages. The input

voltage must remain typically 2.0V above

the output voltage even during the low point

on the input ripple voltage.

Note : C1 and C2 are required if regulator is located

far from power supply filter and load, or oscillation

may induced on the loop.

G I

O

SOT-89