Specifications of any and all SANYO Semiconductor Co.,Ltd. products described or contained herein stipulate

the performance, characteristics, and functions of the described products in the independent state, and are not

guarantees of the performance, characteristics, and functions of the described products as mounted in the

customer

device, the customer should always evaluate and test devices mounted in the customer

equipment.

Any and all SANYO Semiconductor Co.,Ltd. products described or contained herein are, with regard to

"standard application", intended for the use as general electronics equipment (home appliances, AV equipment,

communication device, office equipment, industrial equipment etc.). The products mentioned herein shall not be

intended for use for any "special application" (medical equipment whose purpose is to sustain life, aerospace

instrument, nuclear control device, burning appliances, transportation machine, traffic signal system, safety

equipment etc.) that shall require extremely high level of reliability and can directly threaten human lives in case

of failure or malfunction of the product or may cause harm to human bodies, nor shall they grant any guarantee

thereof. If you should intend to use our products for applications outside the standard applications of our

customer who is considering such use and/or outside the scope of our intended standard applications, please

consult with us prior to the intended use. If there is no consultation or inquiry before the intended use, our

customer shall be solely responsible for the use.

31407 MS PC / N1306 MS PC 20060411-S00002 No.A0497-1/4

LA5777

Overview

The LA5777 is a Separately-excited step-down switching regulator (5V).

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

Pd max1

Infinitely large heat sink.

7.5

W

Allowable power dissipation

Pd max2

Independent IC.

1.75

W

Operating temperature

Topr

-30 to +125

°C

Storage temperature

Tstg

-40 to +150

°C

Recommended Operating Conditions at Ta = 25

°C

Parameter

Symbol

Conditions

Ratings

Unit

Input voltage range

VIN

8 to 28

V

Monolithic Linear IC

Separately-excited Step-down

Switching Regulator (5V)

Ordering number : ENA0497A