N1306 MS PC 20060411-S00008 No.A0498-1/4

that can handle applications that require extremely high levels of reliability, such as life-support systems,

aircraft’s control systems, or other applications whose failure can be reasonably expected to result in

serious physical and/or material damage. Consult with your SANYO Semiconductor representative

nearest you before using any SANYO Semiconductor products described or contained herein in such

applications.

at values that exceed, even momentarily, rated values (such as maximum ratings, operating condition

ranges, or other parameters) listed in products specifications of any and all SANYO Semiconductor

products described or contained herein.

LA5779MP

Overview

The LA5779MP is a Separately-excited step-down switching regulator (variable type).

Functions

• High efficiency.

• Six external parts.

• Time-base generator (160kHz) incorporated.

• Current limiter incorporated.

• Thermal shutdown circuit incorporated.

• ON/OFF function.

Specifications

Absolute

Maximum Ratings at Ta = 25°C

Parameter

Symbol

Conditions

Ratings

Unit

Maximum Input voltage

VIN max

30

V

Maximum Output current

IO max

3

A

SW pin application reverse voltage

VSW

-1

V

Allowable power dissipation

Pd max

Mounted on a substrate.*

3.9

W

Operating temperature

Topr

-30 to +125

°C

Storage temperature

Tstg

-40 to +150

°C

* Specified substrate : 76.1×114.3×1.6mm

Recommended Operating Conditions at Ta = 25

°C

Parameter

Symbol

Conditions

Ratings

Unit

Input voltage range

VIN

4.5 to 28

V

Monolithic Linear IC

Separately-excited Step-down

Switching Regulator

(Variable Type)

Ordering number : ENA0498