34063M View Datasheet(PDF) - American Accurate Components, Inc.
Part Name
Description
MFG CO.
34063M Datasheet PDF : 13 Pages
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0.8A STEP-DOWN/STEP-UP/INVERTING DC-DC CONVERTER
Typical Applications (Continued)
Data Sheet
AZ34063
8
Vin
4.5-6V
7
Rsc
0.24
6
+
C1
100 PF
5
B
SQ
A
R
IIpPkK
OSC CT
1.25V
+
Reference
Regulator
-
U1 AZ34063
R1 953
R2
8.2k
1
2
L1
88 P+
3
CT
1500pF
D1
1N5819
4
Vout
-12V/100mA
C2
1000 PF
L2 1.0 P+
Optional
Filter
Vout
C3
100 PF
Figure 12. Voltage Inverting Converter (Note 7)
Note 7: This is a typical inverting converter configuration. The working process in the steady state is similar to
step-up converter, the difference in this situation is that the voltage at the non-inverting pin of the comparator is
equal to 1.25V+VOUT, then Vpin5 = VOUT * R2/(R1+R2) = 1.25V+VOUT, so the output voltage can be decided by
VOUT = -1.25 * (R1+R2)/R1 (V).
Apr. 2005 Rev. 2. 1
BCD Semiconductor Manufacturing Limited
10
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