LTC3713

LTC3713 Low Input Voltage, High Power, No RSENSETM Synchronous Buck DC/DC Controller FEATURES s s s DESCRIPTIO s s s s s s s s s s s s U APPLICATIO S s s s s Very Low VIN(MIN): 1.5V True Current Mode Control 5V Drive for N-Channel MOSFETs Eliminates Auxillary 5V Supply No Sense Resistor Required Uses Standard 5V Logic-Level N-Channel MOSFETs Adjustable Current Limit Adjustable Frequency Switch tON(MIN) < 100ns 2% to 90% Duty Cycle at 200kHz 0.8V ±1% Reference Power Good Output Voltage Monitor Programmable Soft-Start Output Overvoltage Protection Optional Short-Circuit Shutdown Timer Small 24-Lead SSOP Package The LTC®3713 is a high current, high efficiency synchronous buck switching regulator controller optimized for use with very low input supply voltages. It operates from inputs as low as 1.5V and provides a regulated output voltage from 0.8V up to (0.9)VIN. The controller uses a valley current control architecture to enable high operating frequencies without requiring a sense resistor. Operating frequency is selected by an external resistor and is compensated for variations in VIN and VOUT. The LTC3713 uses a pair of standard 5V logic-level N-channel external MOSFETs, eliminating the need for expensive P-channel or low threshold devices. Discontinuous mode operation provides high efficiency operation at light loads. A forced continuous control pin reduces noise and RF interference, and can assist secondary winding regulation by disabling discontinuous operation when ...