GENERAL DESCRIPTION
The XR8303B/XR8303BF is a high-efficiency monolithic synchronous step-down DC/DC converter that operates from a 4V to 32V input voltage and can deliver up to 3A of continuous output current. The supply current of the XR8303B is 200µA when there is no load, and drops to <3µA when it is turned off.
DCM/CCM mode operation provides very low output ripple voltage for noise sensitive applications. Switching frequency is internally set at 600kHz for XR8303B, FCCM mode operation for XR8303BF, allowing the use of small surface mount inductors and capacitors. Low output voltages are easily supported with the 0.925V feedback reference voltage.
The XR8303B/XR8303BF requires a minimal number of readily available, external components and is available in a small package.
FEATURES
• Wide 4V to 32V Operating Input Range
• 3A Continuous Output Current
• 600kHz Switching Frequency
• Short Protection with Hiccup-Mode
• Built-in overcurrent Limit
• DCM for High Efficiency in Light Load Condition（XR8303B）
• FCCM for Low noise（XR8303BF）
• Integrated internal Soft-Start
• 140/90mΩ Low RDS(ON) internal MOSFETs
• Output Adjustable from 0.925V
• Low EMI Signature
• 100% Duty cycle Max
• Thermal Shutdown
• COT Mode
• ESOP-8 Package
APPLICATIONS
• Automotive Entertainment
• Wireless and DSL Modems
• Computer Entertainment
• IoT Applications
• Digital Still and Video Cameras