XL1509 is a 150KHz fixed frequency pulse Wide modulation (step-down) DC/DC converter. Has 2A Load driving capability and high efficiency, low ripple and excellent Linearity, good load regulation capability, and only a minimum of external components are required. Adjustable output is easy to use, built-in frequency compensation and fixed frequency Rate oscillator. Pulse width modulation control circuit can linearly adjust the duty The ratio is from 0 to 100%. With enabling function, built-in overcurrent and Short-circuit protection function, when over-current and short-circuit protection occurs, The operating frequency of XL1509 will be reduced from 150KHz to 50KHz. The built-in frequency compensation module maximizes the external components of the XL1509 less.

?LCD Monitor and LCD TV
? Digital Photo Frame
? Set-up Box
?ADSL Modem
? Telecom / Networking Equipment

? 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
? 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