Features
 AEC-Q100 qualified for automotive
application
 Temperature Grade 1: -40℃ to 125℃
Ambient Operating Temperature Range
 Device HBM ESD Classification Level
Class3A
 Operating Voltage：4.5V~45V
 Adjustable and 5.0V Versions
 Minimum Drop Out 1.5V
 Fixed 150KHz Switching Frequency
 2A Constant Output Current Capability
 Internal Optimize Power Transistor
 TTL shutdown capability
 Built in thermal shutdown function
 Built in current limit protection function
 Built in output short protection function
 Available in SOP8-EPpackage

General Description
The XL1509Q is an AEC-Q100 qualified ，
150 KHz fixed frequency buck DC/DC
converter, capable of driving a 2A load with
high voltage, high efficiency. The XL1509Q
supports wide input operating voltage range
of 4.5V ~ 45V and a maximum duty cycle of
100% output. A built-in loop compensation
module reduces components in the system,
lowering power system cost and reducing
printed circuit board space.
The XL1509Q is available in adjustable and
fixed 5.0V versions. The XL1509Q has
built-in thermal shutdown, current limit
protection and output short protection
function and so on. When the output short
protection function happens, the operation
frequency will be reduced about from
150KHz to 30KHz.

Applications
 Vehicle Mounted Device
 Industrial and Motor Control
 Networking Equipment