LTC3812-5

FEATURES n High Voltage Operation: Up to 60V n Large 1Ω Gate Drivers n No Current Sense Resistor Required n Dual N-Channel MOSFET Synchronous Drive n Extremely Fast Transient Response n ±0.5% 0.8V Voltage Reference n Programmable Soft-Start n Generates 5.5V Driver Supply n Selectable Pulse-Skipping Mode Operation n Power Good Output Voltage Monitor n Adjustable On-Time/Frequency: tON(MIN) < 100ns n Adjustable Cycle-by-Cycle Current Limit n Undervoltage Lockout On Driver Supply n Output Overvoltage Protection n Thermally Enhanced 16-Pin TSSOP Package APPLICATIONS n 48V Telecom and Base Station Power Supplies n Networking Equipment, Servers n Automotive and Industrial Control Systems LTC3812-5 60V Current Mode Synchronous Switching Regulator Controller DESCRIPTION The LTC3812-5 is a synchronous step-down switching regulator controller that can directly step down voltages from up to 60V input, making it ideal for telecom and automotive applications. The LTC3812-5 uses a constant on-time valley current control architecture to deliver very low duty cycles with accurate cycle-by-cycle current limit without requiring a sense resistor. A precise internal reference provides 0.5% DC accuracy. A high bandwidth (25MHz) error amplifier provides very fast line and load transient response. Large 1Ω gate drivers allow the LTC3812-5 to drive large power MOSFETs for higher current applications. The operating frequency is selected by an external resistor and is compensated for variations in VIN...