CP34063
1.5A,Step-Up/Down/Inverting Switching Regulators
8
7
6
1
2
S
R
Q
Q2
Q1
I
pk
R
sc
0.33
C
T
Osc
1N5819
3
V
in
25 V
V
CC
L
220 µH
C
+
T
100
1.25 V
Ref
Reg
+
-
Comp.
470
pF
5
4
1.0 µH
V
R2
out
5.0 V/500 mA
V
out
3.6 k
+
+
R1 1.2 k
100
470
C
O
Optional Filter
Results
Test
Conditions
= 15 V to 25 V, I = 500 mA
Line Regulation
Load Regulation
Output Ripple
V
in
V
in
V
in
V
in
V
in
V
in
12 mV = ±0.12%
3.0 mV = ±0.03%
120 mVpp
1.1 A
O
= 25 V, I = 50 mA to 500 mA
O
= 25 V, I = 500 mA
O
Short Circuit Current
Efficiency
= 25 V, R = 0.1 Ω
L
= 25 V, I = 500 mA
83.7%
O
Output Ripple With Optional Filter
= 25 V, I = 500 mA
40 mVpp
O
Figure 10. Step–Down Converter
1
2
8
7
6
1
2
V
8
7
V
out
R
sc
R
sc
V
in
V
in
6
Figure 11. External Current Boost Connections for IC Peak Greater than 1.5 A
11a. External NPN Switch 11b. External PNP Saturated Switch
* All specs and applications shown above subject to change without prior notice.
1F-5 NO.66 SEC.2 NAN-KAN RD ., LUCHU , TAOYUAN, TAIWAN
Tel:886-3-3214525
Email: server@ceramate.com.tw
Http: www.ceramate.com.tw
Rev 1.1 Jul.18,2003
Page 7 of 10
Fax:886-3-3521052
CERAMATE [ CERAMATE TECHNICAL ]
