34063AM-E1 参数 Datasheet PDF下载

Data Sheet

1.5A STEP-DOWN/STEP-UP/INVERTING DC-DC CONVERTER

Typical Applications (Continued)

AZ34063A

8

B

A

S

R

Q

1

7

Rsc

0.33

Ipk

I

PK

OSC

C

T

2

D1

1N5819

L1

220

µH

V

IN

25V

+

C1

100µF

6

1.25V

Reference

Regulator

3

C

T

470 pF

+

-

5

4

L2 1.0

µH

V

OUT

R1 3.6k

+

5V/500mA

C2

470

µF

Optional

Filter

+

V

OUT

U1 AZ34063A

R2

1.2k

C3

100

µF

Figure 11. Step-Down converter (Note 6)

Note 6: This is a typical step-down converter configuration. The working process in the steady state is similar to

step-up converter, V

PIN5

=V

OUT

*R2/(R1+R2)=1.25 (V), the output voltage can be decided by V

OUT

=1.25*

(R1+R2)/R2 (V).

Sep. 2006 Rev. 1. 3

BCD Semiconductor Manufacturing Limited

9