Advanced Power
Electronics Corp.
APE1707
150KHz, 2A PWM BUCK DC/DC CONVERTER
FEATURES
DESCRIPTION
Output Voltage : 3.3V, 5V, 12V and Adjustable
Output Voltage
Adjustable Version Output Voltage Range, 1.23V
to 38.5V
150KHz 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 40V
Output Load Current 2A
SO-8, ESOP-8, TO-263-5L and TO-252-5L
Pb-Free Packages.
Low Power Standby Mode.
Built-in Switching Transistor on Chip
The APE1707 series are monolithic IC designed for a
step-down DC/DC converter, and own the ability of driving a
2A 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
compensation 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 APE1707 series operates at a switching frequency
of 150KHz thus allow smaller sized filter components than
what would be needed with lower frequency switching
regulators. The output version included fixed 3.3V, 5V, 12V,
and an adjustable type. The chips are available in SO-8,
ESOP-8, TO-263-5L and TO-252-5L packages.
Halogen Free Product
TYPICAL APPLICATION
1. ADJUSTABLE OUTPUT VOLTAGE VERSION
VIN=12V
1
Vcc
R1
4.7K
Vss
SW
Vss
FB
Vss
EN
C2
0.1uF
Vout=5.0V/2A
2
47uH
U1
C1
470uF
L1
Vss
D1
B340A
C3
470uF
C6
0.1uF
R2
1.5K
APE1707
Data and specifications subject to change without notice
1
20130206V2.1