CYStech Electronics Corp.

Spec. No. : C518M3

Issued Date : 2003.04.02

Revised Date :2007.11.19

Page No. : 1/5

LM78L09M3

CYStek Product Specification

Low Current Positive Voltage Regulator

LM78L09M3

SOT-89

Description

The LM78L09M3 series of surface mount regulators are easy-to-use devices suitable for

multitude of applications that require a regulated supply of up to 100mA. These regulators feature

internal current limiting and thermal shutdown, making them remarkably rugged. No external

components are required with the LM78L09M3 devices in many applications.

These devices offer a substantial performance advantage over the traditional zener diode resistor

combination, as output impedance and quiescent current are substantially reduced.

Features:

• Wide Range Of Available, Fixed Output Voltages

• Internal Short-Circuit Current Limiting

• Internal Thermal Overload Protection

• No External Components Required

°C)

• Input Voltage ....................................................................................................................... 30 V

• Total Power Dissipation .................................................................................... Internally limited

• Operating Temperature Range .......................................................................... 0 °C to +125 °C

• Maximum Junction Temperature ..................................................................................... 125 °C

• Storage Temperature Range .......................................................................... -55 °C to +150 °C

• Lead Temperature (Soldering 10S).................................................................................. 260 °C

Typical Application

Schematic Diagram

1

2

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.

576

3.41K

3.89K

7.8K

2.84K

13K

5pF

2.23K

GND

1.5K

1.9K

100

100

5K

5.7K

Vout

Vin

LM78L09

Vout

Vin

1

3

C1

C2