ML34063
ꢀ Step-Down Converter Application Circuit
8
DRIC
1
SC
Q
S
R
2
SE
1N5819
7
3
Ipk
CT
IPK
CT
470pF
Oscillator
0.33 ohm
6
VIN = 25V
100uF
VCC
+
1.25V
220uH
+
Voltage Reference
Comparator
4
5
GND
1.0uH
CII
ML34063 (Bottom View)
VOUT =
5.0V/500mA
VOUT
+
+
3.6k ohm
1.2k ohm
Optional
Low Pass Filter
470uF
100uF
Test
Conditions
Results
Line Regulation
Load Regulation
Output Ripple
Vin = 15V to 25V, IO = 500mA
12mV + 0.12%
3.0mV + 0.03%
120 mVpp
1.1A
Vin = 25V, IO = 50mA to 500mA
Vin = 25V, IO = 500mA
Vin = 25V, RL = 0.1 ohm
Vin = 25V, IO = 500mA
Vin = 25V, IO = 500mA
Short Circuit Current
Efficient
83.7%
Output Ripple with Optional Filter
40 mVpp
P4/5
Rev B, June 2005
MINILOGIC [ MINILOGIC DEVICE CORPORATION LIMITED ]
