一、General Description
The XR3903 is a low EMI signature, asynchronous, step-down, switch-mode converter with internal power MOSFETs.
It offers a very compact solution to provide a 3A continuous current over a wide input supply range, with excellent load and line regulation. XR3903 achieves low EMI signature with well controlled switching edges. Fault condition protection includes programmable-output over-voltage protection, Constant on time Mode, and thermal shutdown.
XR3903 requires a minimal number of readily available standard external components. It is available in ESOP8 package.
二、Features
Wide 4.5V to 40V Operating Input Range
3.0A Continuous Output Current
500KHz Switching Frequency
Short Protection with Hiccup-Mode
Built-in Over Current Limit
Programmable Output Over-Voltage Protection
DCM Mode for High Efficiency in Light Load
Integrated internal Soft-Start
120/80mΩ Low RDS(ON) Internal MOSFETs
Output Adjustable from 0.925V
Low EMI Signature
100% Duty cycle
Integrated internal compensation
Thermal Shutdown
Available in ESOP8 Package
Constant on time Mode
三、Applications
Automotive Entertainment
Wireless and DSL Modems
Computer Entertainment
Power Supply for Car Chargers