LA5754MP

No.A0952-3/5

VO = 1+

× 2.66V(typ)

R2

R1

Block Diagram

Application Circuit Example

VIN

SWOUT

VOS

GND

SS

L1

47

µH

C1

1000

µF

C2

1000

µF

D1

SBD

LA5754MP

C3

1

µF

R2

R1

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

Calculation equation to set the output voltage

This IC controls the switching output so that the VOS pin voltage becomes 2.66V (typ).

The equation to set the output voltage is as follows:

The VOS pin has the inrush current of 1µA (typ). Therefore, the error becomes larger when R1 and R2 resistance

values are large.

VIN 1

2 SWOUT

4 VOS

5 SS

Reg.

Comp.

Amp.

OSC

Reset

VREF

TSD

Drive

OCP

3 GND