LTC3830

U U LTC3830/LTC3830-1 High Power Step-Down Synchronous DC/DC Controllers for Low Voltage Operation FEATURES ■ High Power Switching Regulator Controller for 3.3V-5V to 1.xV-3.xV Step-Down Applications ■ No Current Sense Resistor Required ■ Low Input Supply Voltage Range: 3V to 8V ■ Maximum Duty Cycle > 91% Over Temperature ■ All N-Channel External MOSFETs ■ Excellent Output Regulation: ±1% Over Line, Load and Temperature Variations ■ High Efficiency: Over 95% Possible ■ Adjustable or Fixed 3.3V Output (16-Pin Version) ■ Programmable Fixed Frequency Operation: 100kHz to 500kHz ■ External Clock Synchronization ■ Soft-Start (16-Pin Version and LTC3830-1) ■ Low Shutdown Current: <10µA ■ Overtemperature Protection ■ Available in S8, S16 and SSOP-16 Packages U APPLICATIO S ■ CPU Power Supplies ■ Multiple Logic Supply Generator ■ Distributed Power Applications ■ High Efficiency Power Conversion DESCRIPTIO The LTC®3830/LTC3830-1 are high power, high efficiency switching regulator controllers optimized for 3.3V-5V to 1.xV-3.xV step-down applications. A precision internal reference and feedback system provide ±1% output regulation over temperature, load current and line voltage variations. The LTC3830/LTC3830-1 use a synchronous switching architecture with N-channel MOSFETs. Additionally, the chip senses output current through the drain-source resistance of the upper N-channel FET, providing an adjustable current limit without a current sense resistor. The LTC3830/LTC3830-1 operate w...