Datasheet
XL2009
3A 180KHz 36V Buck DC to DC Converter With CV/CC Loop
Features
General Description
Wide 8V to 36V Input Voltage Range
Output Adjustable from 1.25V to 32V
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
Maximum Duty Cycle 100%
Minimum Drop Out 0.3V
Fixed 180KHz Switching Frequency
Maximum 3A Switching Current
Internal Optimize Power MOSFET
High efficiency
frequency
compensation
and
a
Excellent line and load regulation
fixed-frequency oscillator.
With output constant current loop
Built in thermal shutdown function
Built in current limit function
The PWM control circuit is able to adjust the
duty ratio linearly from 0 to 100%. An 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.
Built in output short protection function
Available in SOP8L package
Applications
Car Charger
Battery Charger
LCD Monitor and LCD TV
Portable instrument power supply
Telecom / Networking Equipment
Figure1. Package Type of XL2009
Rev 1.1
www.xlsemi.com
1
XLSEMI [ XLSEMI ]
