LTC3703 Datasheet | Linear Technology

Features n High Voltage Operation: Up to 100V n Large 1Ω Gate Drivers n No Current Sense Resistor Required n Step-Up or Step-Down DC/DC Converter n Dual N-Channel MOSFET Synchronous Drive n Excellent Line and Load Transient Response n Programmable Constant Frequency: 100k Hz to 600k Hz n ±1% Reference Accuracy n Synchronizable up to 600k Hz n Selectable Pulse-Skip Mode Operation n Low Shutdown Current: 50µA Typ n Programmable Current Limit n Undervoltage Lockout n Programmable Soft-Start n 16-Pin Narrow SSOP and 28-Pin SSOP Packages Applications n 48V Tele and Base Station Power Supplies n Networking Equipment, Servers n Automotive and Industrial Control L, LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks and Thin SOT and No RSENSE are trademarks of Linear Technology Corporation. All other trademarks are the property of their respective owners. Protected by U.S. Patents, including 5408150, 5055767, 6677210, 5847554, 5481178, 6304066, 6580258. 100V Synchronous Switching Regulator Controller Description The LTC®3703 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 LTC3703 drives external N-channel MOSFETs using a constant frequency (up to 600k Hz), voltage mode architecture. A precise internal reference provides 1% DC accuracy. A high bandwidth error amplifier and patented line feedforward pensation provide very fast line and load transient response. Strong 1Ω gate drivers allow the LTC3703 to drive multiple MOSFETs for higher current applications. The operating frequency is user programmable from 100k Hz to 600k Hz and can also be synchronized to an external clock for noise-sensitive applications. Current limit is programmable with an external resistor and utilizes the voltage drop across the synchronous MOSFET to eliminate the need for a current sense resistor. For applications requiring up to 60V...