AP34063_09 Datasheet, PDF (1/11 Pages) Diodes Incorporated – UNIVERSAL DC/DC CONVERTER

AP34063
UNIVERSAL DC/DC CONVERTER
Features
• Operation from 3.0V to 40V Input
• Low Standby Current
• Current Limiting
• Output Switch Current to 1.6A
• Output Voltage Adjustable
• Frequency Operation to 100 kHz
• Precision 2% Reference
• Lead Free packages: SOP-8L and PDIP-8L (Note 1)
• SOP-8L: Available in “Green” Molding Compound
(No Br, Sb)
• Lead Free Finish/RoHS Compliant (Note 2)
Application Circuit
Description
The AP34063 Series is a monolithic control circuit containing the
primary functions required for DC-to-DC converters. These
devices consist of an internal temperature compensated
reference, comparator, controlled duty cycle oscillator with an
active current limit circuit, driver and high current output switch.
This series is specifically designed for incorporating in
Step-Down and Step-Up and Voltage-Inverting applications with
a minimum number of external components.
(1) Step-Up Converter
8
180
7
Rsc
0.24
Vin
12V
6
+
470
uF
5
120uH
L
1
SQ
R
Ipk
CT
Osc
VCC
+
_
Comp.
Q2
Q1
2
B240
1.25V
Ref
Reg
3
CT
680
pF
4
R2
R1
10k ^56k
470uF
+
CO
Vout
28V/200mA
1.0uH
Vout
+
100
Optional Filter
Test
Line Regulation
Load Regulation
Output Ripple
Efficiency
Conditions
Vin = 9V to 12V, IO = 200mA
Vin = 12V, IO = 50mA to 200mA
Vin = 12V, IO = 200mA
Vin = 12V, IO = 200mA
Results
20mV = ±0.035%
15mV = ±0.035%
500mVPP
80%
AP34063 Rev. 5
DS31004
1 of 11
www.diodes.com
JULY 2009
© Diodes Incorporated