SP34063A データシートの表示（PDF） - Unspecified
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SP34063A Datasheet PDF : 10 Pages
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TYPICAL INVERTING CONVERTER CIRCUIT
8
7
RSC
0.24Ω
VIN = 4.5V - 6V
6
+ C1
100µF
5
SP34063A
B
S
A
Q
R
Ipk
OSC CT
+
-
1.25V
Reference
Regulator
R2 8.2kΩ
R1 0.953kΩ
1
2
L1
88 µH
3
CT
1500 pF
D1
4
1N5819
VOUT
L2 1.0 µH
-12V/100mA
VOUT
C2
+ 1000 µF
Optional
Filter
C3
+ 100 µF
This is a typical boost converter configuration. The working process in the steady state is similar to a boost 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. The output voltage can be decided by VOUT = -1.25V*(R1+R2)/R1
(V).
Date: 11/29/05
SP34063A 1.5A Buck/Boost/Inverting DC-DC Switching Regulator
7
© Copyright 2005 Sipex Corporation
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