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

http://onsemi.com

Semiconductor Components Industries, LLC, 2013

August, 2013

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

％ FR4

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

Stresses exceeding Maximum Ratings may damage the device. Maximum Ratings are stress ratings only. Functional operation above the Recommended Operating

Conditions is not implied. Extended exposure to stresses above the Recommended Operating Conditions may affect device reliability.