LTC3814-5

LTC3814-5 60V Current Mode Synchronous Step-Up Controller FEATURES n High Output Voltages: Up to 60V n Large 1Ω Gate Drivers n No Current Sense Resistor Required n Dual N-Channel MOSFET Synchronous Drive n ±0.5% 0.8V Voltage Reference n Fast Transient Response n Programmable Soft-Start n Generates 5.5V Driver Supply n Power Good Output Voltage Monitor n Adjustable Off-Time/Frequency: tOFF(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 24V Fan Supplies n 48V Telecom and Base Station Power Supplies n Networking Equipment, Servers n Automotive and Industrial Control Systems DESCRIPTION The LTC3814-5 is a synchronous step-up switching regulator controller that can generate output voltages up to 60V. The LTC3814-5 uses a constant off-time peak current control architecture to deliver very high 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 LTC3814-5 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. A shutdown pin allows the LTC3814-5 to be turned off reducing the supply current to <230μA. L, LT, LTC, LTM, Linear...