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XL1509

XLSEMI
Part Number XL1509
Manufacturer XLSEMI
Description 2A 150KHz 40V Buck DC to DC Converter
Published Apr 3, 2014
Detailed Description Datasheet 2A 150KHz 40V Buck DC to DC Converter Features n n n n n XL1509 General Description The XL1509 is a 150 KHz f...
Datasheet PDF File XL1509 PDF File

XL1509
XL1509

Overview
Datasheet 2A 150KHz 40V Buck DC to DC Converter Features n n n n n XL1509 General Description The XL1509 is a 150 KHz fixed frequency PWM buck (step-down) DC/DC converter, capable of driving a 2A 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 n n n n n n n n n n n Fixed 150KHz Switching Frequency 2A 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 Built in second current limit function Available in SOIC8 package Applications n n n n n LCD Monitor and LCD TV Digital Photo Frame Set-up Box ADSL Modem Telecom / Networking Equipment Figure1.
Package Type of XL1509 Rev 2.
0 1 www.
xlsemi.
com Free Datasheet http://www.
Datasheet4U.
com Datasheet 2A 150KHz 40V Buck DC to DC Converter Pin Configurations XL1509 VIN OUTPUT FEEDBACK ON/OFF 1 2 XL1509 3 4 8 7 6 5 GND GND GND GND Figure2.
Pin Configuration of XL1509 (Top View) Table 1 Pin Description Pin Number 1 2 Description Supply Voltage Input Pin.
XL1509 operates from a 4.
5V to 40V DC voltage.
Bypass Vin to GND with a suitably large VIN capacitor to eliminate noise on the input.
Power Switch Output Pin (SW).
Output is the switch node that OU...


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