LTC3832-1 Datasheet | Linear Technology

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 High Efficiency Power Conversion TYPICAL APPLICATIO 4.7µF 5.1Ω 0.1µF 0.01µF 15k GND 6.49k FB...