Ordering Information of XL1507

General Description of XL1507
 

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.

Features of XL1507

●Wide 4.5V to 40V Input Voltage Range

●5V and adjustable versions

●Output Adjustable from 1.23V to 37V

●Maximum Duty Cycle 100%

●Minimum Drop Out 1.5V

●Fixed 150KHz Switching Frequency

●3A 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 TO-252 package

Applications of XL1507

● LCD Monitor and LCD TV

● Digital Photo Frame

● Set-up Box

● ADSL Modem

● Telecom / Networking Equipment

Function Block of XL1507

Typical Application Circuit 12V-5V/3A

Typical System Application for ADJ Version