Features
n Wide 8V to 36V Input Voltage Range
n Output Adjustable from 1.25V to 32V
n Maximum Duty Cycle 100%
n Minimum Drop Out 0.3V
n Fixed 180KHz Switching Frequency
n Maximum 3A Switching Current
n Internal Optimize Power MOSFET
n High efficiency
n Excellent line and load regulation
n With output constant current loop
n Built in thermal shutdown function
n Built in current limit function
n Built in output short protection function
n Available in SOP8L package
Applications
n Car Charger
n Battery Charger
n LCD Monitor and LCD TV
n Portable instrument power supply
n Telecom / Networking Equipment
General Description
The XL2009 is a 180 KHz fixed frequency
PWM buck (step-down) DC/DC converter,
capable of driving a 2.5A load with high
efficiency, low ripple and excellent line and
load regulation. Requiring a minimum
number of external components, the regulator
is simple to use and include internal
frequency compensation and a
fixed-frequency oscillator.
The PWM control circuit is able to adjust the
duty ratio linearly from 0 tAn over
current protection function is built inside.
When short protection function happens, the
operation frequency will be reduced from
180KHz to 48KHz. An internal compensation
block is built in to minimize external
component count.