34063AM Просмотр технического описания (PDF) - BCD Semiconductor
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34063AM Datasheet PDF : 13 Pages
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1.5A STEP-DOWN/STEP-UP/INVERTING DC-DC CONVERTER
Typical Applications (Continued)
Data Sheet
AZ34063A
8
VIN 25V
7
Rsc
0.33
6
+ C1
100µF
5
R2
1.2k
B
SQ
A
R
IIpPkK
OSC CT
1.25V
+
Reference
Regulator
-
U1 AZ34063A
R1 3.6k
1
2
D1
1N5819
3
CT
470 pF
L1
220 µH
4
VOUT
5V/500mA
+
C2
470 µF
L2 1.0 µH
Optional
Filter
VOUT
+
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, VPIN5=VOUT*R2/(R1+R2)=1.25 (V), the output voltage can be decided by VOUT=1.25*
(R1+R2)/R2 (V).
Sep. 2006 Rev. 1. 3
BCD Semiconductor Manufacturing Limited
9
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