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XLSEMI

XL1583 Datasheet Preview

XL1583 Datasheet

3A 380KHz 23V Buck DC to DC Converter

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3A 380KHz 23V Buck DC to DC Converter
Datasheet
XL1583
Features
„ Wide 3.6V to 23V Input Voltage Range
„ Output Adjustable from 1.222V to 21V
„ Maximum Duty Cycle 100%
„ Minimum Drop Out 0.6V
„ Fixed 380KHz Switching Frequency
„ 3A Constant Output Current Capability
„ Internal Optimize Power MOSFET
„ High efficiency
„ Excellent line and load regulation
„ TTL shutdown capability
„ EN pin with hysteresis function
„ Built in thermal shutdown function
„ Built in current limit function
„ Built in output short protection function
„ Available in SOP8 package
Applications
„ LCD Monitor and LCD TV
„ Digital Photo Frame
„ Set-up Box
„ ADSL Modem
„ Telecom / Networking Equipment
General Description
The XL1583 is a 380KHz 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. When short protection function
happens, the operation frequency will be
reduced from 380KHz to 80KHz. An internal
compensation block is built in to minimize
external component count.
Rev 1.0
Figure1. Package Type of XL1583
1
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XLSEMI

XL1583 Datasheet Preview

XL1583 Datasheet

3A 380KHz 23V Buck DC to DC Converter

No Preview Available !

3A 380KHz 23V Buck DC to DC Converter
Pin Configurations
Datasheet
XL1583
XL1583
Figure2. Pin Configuration of XL1583 (Top View)
Table 1 Pin Description
Pin Number
1,6,8
2
3
4
5
7
Pin Name
NC
VIN
SW
GND
FB
EN
Description
No Connected.
Supply Voltage Input Pin. XL1583 operates from a 3.6V to 23V
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 XL1583.
Feedback Pin (FB). Through an external resistor divider
network, Feedback senses the output voltage and regulates it.
The feedback threshold voltage is 1.222V.
Enable Pin. Drive EN pin low to turn off the device, drive it
high to turn it on. Floating is default high.
Rev 1.0
www.xlsemi.com
2


Part Number XL1583
Description 3A 380KHz 23V Buck DC to DC Converter
Maker XLSEMI
Total Page 9 Pages
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