Features
n Wide 4.5V to 40V Input Voltage Range
n 3.3V,5V,12V, and adjustable versions
n Output Adjustable from 1.23V to 37V
n Maximum Duty Cycle 100% XL2596
n Minimum Drop Out 1.5V XL2596
n Fixed 150KHz Switching Frequency
n 3A Constant Output Current Capability
n Internal Optimize Power Transistor
n High efficiency
n Excellent line and load regulation
n TTL shutdown capability
n ON/OFF pin with hysteresis function
n Built in thermal shutdown function
n Built in current limit function
n Built in second current limit function
n Available in TO-220,TO-263 packages
Applications
n LCD Monitor and LCD TV
n Digital Photo Frame
n Set-up Box XL2596
n ADSL Modem XL2596
n Telecom / Networking Equipment
General Description XL2596
The XL2596 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 XL2596
frequency compensation and a
fixed-frequency oscillator.
The PWM control circuit is able to adjust the
duty ratio linearly from 0 tAn 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. XL2596
