SP34063A データシートの表示（PDF） - Unspecified

部品番号

コンポーネント説明

メーカー

SP34063A

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

Unspecified 

R3 180Ω 8

7

RSC

0.22Ω

VIN = 12V

6

+ C1

100µF

5

R2 2.2kΩ

L1 150µH

TYPICAL BOOST CONVERTER CIRCUIT

SP34063A

B

S

A

Q

R

Ipk

OSC CT

+

-

1.25V

Reference

Regulator

R1 47kΩ

1

D1

1N5819

2

3

CT

1500 pF

4

VOUT

L2 1.0 µH

28V/175mA

+ C2

330 µF

Optional

Filter

VOUT

+ C3

100 µF

This is a typical boost converter configuration. In the steady state, if the resistor divider voltage at pin 5 is greater than

the voltage in the non-inverting input, which is 1.25V determined by the internal reference, the output of the

comparator will go low. At the next switching period, the output switch will not conduct and the output voltage will

eventually drop below its nominal voltage until the divider voltage at pin 5 is lower than 1.25. Then the output of the

comparator will go high, the output switch will be allowed to conduct. Since 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

5

© Copyright 2005 Sipex Corporation

Share Link: