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XLSEMI

XL1507 Datasheet Preview

XL1507 Datasheet

3A 150KHz 30V Buck DC to DC Converter

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XLSEMI
3A 150KHz 30V Buck DC to DC Converter
Datasheet
XL1507
Features
„ Wide 4.75V to 30V Input Voltage Range
„ 3.3V,5V,12V, and adjustable versions
„ Output Adjustable from 1.23V to 28V
„ Maximum Duty Cycle 100%
„ Minimum Drop Out 1.5V
„ Fixed 150KHz Switching Frequency
„ 3A Constant Output Current Capability
„ Internal Optimize Power Transistor
„ Up to 90% Efficiency
„ Excellent line and load regulation
„ TTL shutdown capability
„ Built in Frequency Compensation
„ Built in Thermal Shutdown Function
„ Built in Current Limit Function
„ Built in Short Protection Function
„ Available in TO-252 package
Applications
„ LCD Monitor and LCD TV
„ Digital Photo Frame
„ Set-up Box
„ ADSL Modem
„ Telecom / Networking Equipment
General Description
The XL1507 is a 150 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
and a short circuit protection function are
built inside. When OCP or SCP happens, the
operation frequency will be reduced from
150KHz to 50KHz. An internal compensation
block is built in to minimize external
component count.
Figure1. Package Type of XL1507 TO252-5L
2007 Rev 1.4
www.xlsemi.com
1




XLSEMI

XL1507 Datasheet Preview

XL1507 Datasheet

3A 150KHz 30V Buck DC to DC Converter

No Preview Available !

XLSEMI
3A 150KHz 30V Buck DC to DC Converter
Pin Configurations TO252-5L
Datasheet
XL1507
Figure2. Pin Configuration of XL1507 (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. XL1507 operates from a 4.75V to
30V 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 XL1507.
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.
2007 Rev 1.4
www.xlsemi.com
2


Part Number XL1507
Description 3A 150KHz 30V Buck DC to DC Converter
Maker XLSEMI
Total Page 12 Pages
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