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XLSEMI

XL2576 Datasheet Preview

XL2576 Datasheet

3A 52KHz 40V Buck DC to DC Converter

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3A 52KHz 40V Buck DC to DC Converter
Datasheet
XL2576
Features
„ Wide 4.5V to 40V Input Voltage Range
„ 5V,12V and adjustable versions
„ Output Adjustable from 1.23V to 37V
„ Maximum Duty Cycle 100%
„ Minimum Drop Out 1.5V
„ Fixed 52KHz Switching Frequency
„ 3A Constant Output Current Capability
„ Internal Optimize Power Transistor
„ High efficiency
„ Excellent line and load regulation
„ TTL shutdown capability
„ ON/OFF pin with hysteresis function
„ Built in thermal shutdown function
„ Built in current limit function
„ Available in TO-220,TO-263 packages
General Description
The XL2576 is a 52 KHz fixed frequency
PWM buck (step-down) DC/DC converter,
capable of driving a 3A 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 to 100%. An enable
function, an over current protection function
is built inside. An internal compensation
block is built in to minimize external
component count.
Applications
„ LCD Monitor and LCD TV
„ Digital Photo Frame
„ Set-up Box
„ ADSL Modem
„ Telecom / Networking Equipment
Rev 2.6
Figure1. Package Type of XL2576
www.xlsemi.com
1




XLSEMI

XL2576 Datasheet Preview

XL2576 Datasheet

3A 52KHz 40V Buck DC to DC Converter

No Preview Available !

3A 52KHz 40V Buck DC to DC Converter
Pin Configurations
Datasheet
XL2576
Figure2. Pin Configuration of XL2576 (Top View)
Table 1 Pin Description
Pin Number
1
2
3
4
5
Pin Name
VIN
OUTPUT
GND
FEEDBACK
ON/OFF
Description
Supply Voltage Input Pin. XL2576 operates from a 4.5V to
40V DC voltage. Bypass Vin to GND with a suitably large
capacitor to eliminate noise on the input.
Power Switch Output Pin (SW). Output is the switch node that
supplies power to the output.
Ground Pin. Care must be taken in layout. This pin should be
placed outside of the Schottky Diode to output capacitor
ground path to prevent switching current spikes from inducing
voltage noise into XL2576.
Feedback Pin (FB). Through an external resistor divider
network, Feedback senses the output voltage and regulates it.
The feedback threshold voltage is 1.23V.
Enable Pin. Drive ON/OFF pin low to turn on the device, drive
it high to turn it off. Floating is default low.
Rev 2.6
www.xlsemi.com
2


Part Number XL2576
Description 3A 52KHz 40V Buck DC to DC Converter
Maker XLSEMI
Total Page 14 Pages
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