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Datasheet
电话：１３４２８７０６２２３ ＱＱ：１１５７００８１１５
3A 150KHz 40V Buck DC to DC Converter
Features
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XL1507
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
is built inside. When second current limit
function happens, the operation frequency
will be reduced from 150KHz to 50KHz. An
internal compensation block is built in to
minimize external component count.
Wide 4.5V to 40V Input Voltage Range
3.3V,5V,12V, and adjustable versions
Output Adjustable from 1.23V to 37V
Maximum Duty Cycle 100%
Minimum Drop Out 1.5V
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Fixed 150KHz Switching Frequency
3A Constant Output Current Capability
Internal Optimize Power Transistor
High e
fficiency
Excellent line and load regulation
TTL shutdown capability
ON/OFF pin with hysteresis function
Built in thermal shutdown function
Built in current limit function
Built in second current limit function
Available in TO-252 package
Applications
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LCD Monitor and LCD TV
Digital Photo Frame
Set-up Box
ADSL Modem
Telecom / Networking Equipment
Figure1. Package Type of XL1507 (TO252-5L)
Rev 2.0
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ETC [ ETC ]
