Data Sheet
150kHz 3A BUCK DC-DC CONVERTER
General Description
The AP3003 series of regulators are fixed frequency
PWM buck (step-down) DC/DC converter, capable of
driving a 3A load with excellent line and load regula-
tion. These regulators include internal frequency com-
pensation and a fixed frequency oscillator so that they
are easy to use. A system adopting AP3003 requires a
minimum number of external components to work.
A standard series of inductors, optimized for use with
the AP3003 series, are available from several manu-
facturers. This feature greatly simplifies the design of
switch-mode power supplies.
These ICs are available in TO-220-5 and TO-263-5
packages.
AP3003
Features
·
·
·
·
·
·
·
·
·
·
3.3V, 5V, 12V Fixed (±4% Tolerance) and Adjust-
able (±3% Tolerance) Output Versions
Guaranteed 3A Output Load Current
150kHz Fixed Frequency Internal Oscillator
Input Voltage Range up to 32V
Requires only 4 external components
High Efficiency up to 90%
Excellent Line and Load Regulation
TTL Shutdown Capability
Low Power Standby Mode, I
Q
Typically 80
µ
A
Built-in Current Limit Protection and Thermal
Shutdown Circuit
Applications
·
·
·
·
LCD Monitor and LCD TV
On-Card DC-DC Converter
DVD Recorder
PDP
TO-220-5
TO-263-5
Figure 1. Package Types of AP3003
Feb. 2007 Rev. 1. 1
1
BCD Semiconductor Manufacturing Limited
BCDSEMI [ BCD SEMICONDUCTOR MANUFACTURING LIMITED ]
