LTC3810 Datasheet | Linear Technology

Features n High Voltage Operation: Up to 100V 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 Output Voltage Tracking/Soft-Start n Generates 10V Driver Supply from Input Supply n Synchronizable to External Clock n Selectable Pulse Skip Mode Operation n Power Good Output Voltage Monitor n Adjustable On-Time/Frequency: t ON(MIN) < 100ns n Adjustable Cycle-by-Cycle Current Limit n Programmable Undervoltage Lockout n Output Overvoltage Protection n 28-Pin SSOP Package APPLICATIONS n 48V Tele and Base Station Power Supplies n Networking Equipment, Servers n Automotive and Industrial Control Systems L, LT, LTC, LTM, Linear Technology, Burst Mode and the Linear logo are registered trademarks and No RSENSE is a trademark of Linear Technology Corporation. All other trademarks are the property of their respective owners. Protected by U.S. Patents including 5481178, 5847554, 6304066, 6476589, 6580258, 6677210, 6774611. 100V Current Mode Synchronous Switching Regulator Controller DESCRIPTION The LTC3810 is a synchronous step-down switching regulator controller that can directly step-down voltages from up to 100V, making it ideal for tele and automotive applications. The LTC3810 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 LTC3810 to drive multiple MOSFETs for higher current applications. The operating frequency is selected by an external resistor and is pensated for variations in VIN and can also be synchronized to an external clock for switching-noise sensitive applications. A shutdown pin allows the LTC3810 to be turned...