LA5744 Datasheet, PDF(3/5 Page) Sanyo Semicon Device – Monolithic Linear IC Separately-Excited Step-Down Switching Regulator (Variable Type)

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LA5744 Datasheet, PDF (3/5 Pages) Sanyo Semicon Device – Monolithic Linear IC Separately-Excited Step-Down Switching Regulator (Variable Type)

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Block Diagram

LA5744

VIN 1

Constant

current

circuit

Reg.

OCP

OSC

Reset

Comp.

Drive

TSD

ON/OFF Comp.

Amp.

0.4V

GND

VREF

2 SWOUT

4 VOS

Application Circuit Example

VIN

SWOUT

22Î¼H

470Î¼F

/50V

LA5744

GND

1Î¼F

VOS

SBD

390Î¼F

Notes :

1. C3 is for the soft start function. Delete C3 and keep the SS pin open when the soft start function is not necessary.

2. In some cases, the output may not turn on if power is applied when a load is connected. If this is a problem, increase the value of

the inductor.

No.A0717-3/5

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