SP34063A データシートの表示（PDF） - Unspecified

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SP34063A

1.5A Buck/Boost/Inverting DC-DC Switching Regulator

Unspecified 

TYPICAL BUCK CONVERTER CIRCUIT

8

7

RSC

0.33Ω

VIN = 25V

6

+ C1

100µF

5

SP34063A

B

S

A

Q

R

Ipk

OSC CT

+

-

1.25V

Reference

Regulator

R2 1.2kΩ

R1 3.6kΩ

1

2

D1

1N5819

3

CT

470 pF

L1

220 µH

4

L2 1.0 µH

VOUT

5V/100mA

VOUT

+ C2

470 µF

Optional

Filter

+ C3

100 µF

This is a typical buck converter configuration. The working process in the steady state is similar to a boost converter,

Vpin5 = VOUT*R2/(R1+R2) = 1.25(V). The output voltage can be decided by VOUT = 1.25V*(R1+R2)/R2(V).

Date: 11/29/05

SP34063A 1.5A Buck/Boost/Inverting DC-DC Switching Regulator

6

© Copyright 2005 Sipex Corporation

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