LTC3832 Datasheet | Linear Technology

LTC3832/LTC3832-1 High Power Step-Down Synchronous DC/DC Controllers for Low Voltage Operation Features s s DESCRIPTIO s s s s s s s s s s s s s U APPLICATIO S s s s s VOUT as Low as 0.6V High Power Switching Regulator Controller for 3.3V-5V to 0.6V-3.x V 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 2.5V Output (LTC3832) Programmable Fixed Frequency Operation: 100k Hz to 500k Hz External Clock Synchronization Soft-Start Low Shutdown Current: <10µA Overtemperature Protection Available in SO-8 and SSOP-16 Packages The LTC®3832/LTC3832-1 are high power, high efficiency switching regulator controllers optimized for 3.3V-5V to 0.6V-3.x V step-down applications. A precision internal reference and feedback system provide ± 1% output regulation over temperature, load current and line voltage variations. The LTC3832/LTC3832-1 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 MOSFET, providing an adjustable current limit without a current sense resistor. The LTC3832/LTC3832-1 operate with an input supply voltage as low as 3V and with a maximum duty cycle of >91% over temperature. They include a fixed frequency PWM oscillator for low output ripple operation. The 300k Hz free-running clock frequency can be externally adjusted or synchronized with an external signal from 100k Hz to 500k Hz. In shutdown mode, the LTC3832 supply current drops to <10µA. The LTC3832-1 is the SO-8 version without current limit, frequency adjustment and shutdown functions. , LTC and LT are registered trademarks of Linear Technology Corporation. CPU Power Supplies Multiple Logic Supply Generator Distributed Power Applications...