APE1702_08 Datasheet, PDF (1/10 Pages) Advanced Power Electronics Corp. – 150KHz, 3A PWM BUCK DC/DC CONVERTER

Advanced Power
Electronics Corp.
APE1702
150KHz, 3A PWM BUCK DC/DC CONVERTER
FEATURES
Output Voltage : 3.3V, 5V, 12V and Adjustable
Output Voltage
Adjustable Version Output Voltage Range, 1.23V
to 19.5V+4%
150KHz +15% Fixed Switching Frequency.
Voltage Mode Non-synchronous PWM Control.
Thermal-shutdown and Current-limit Protection.
ON/OFF Shutdown Control Input.
Short Circuit Protect(SCP)
Operating Voltage can be up to 22V
Output Load Current 3A
5-Lead TO-263/TO-220
Low Power Standby Mode.
Built-in Switching Transistor on Chip
RoHS Compliant
DESCRIPTION
The APE1702 series are monolithic IC designed for a
step-down DC/DC converter, and own the ability of driving a
3A load without additional transistor. It saves board space.
The external shutdown function can be controlled by logic
level and then come into standby mode. The internal compen-
sation makes feedback control having good line and load
regulation without external design. Regarding protected function,
thermal shutdown is to prevent over temperature operating
from damage, and current limit is against over current operating
of the output switch. if current limit function occurs and VFB
is down below 0.5V the switching frequency will be reduced.
The APE1702 series operates at a switching frequency of
150KHz thus allow smaller sized filter components than what
would be needed with lower frequency switching regulators.
Other features include a guaranteed +4% tolerance on output
voltage under specified input voltage and output load con-
ditions, and +15% on the oscillator frequency. The output
version included fixed 3.3V, 5V, 12V and an adjustable type.
The chips are available in a 5-Lead TO-263 and 5-Lead
TO-220 package.
TYPICAL APPLICATION
1. ADJUSTABLE OUTPUT VOLTAGE VERSION
2. ADJUSTABLE OUTPUT VOLTAGE VERSION WITH DELAYED STARTUP
Data and specifications subject to change without notice
1
200803105