Datasheet LTC3646, LTC3646-1 (Analog Devices) - 10

LTC3646/LTC3646-1
OPERATION SVIN/PVIN Overvoltage Protection Short-Circuit Protection
In order to protect the internal power MOSFET devices The LTC3646 is designed to withstand output short circuits. against transient voltage spikes, the LTC3646 continuously In this situation the part will source ILIM (approximately monitors the SVIN pin for an overvoltage condition. When 1.2A) plus half the inductor current ripple. Since VOUT is SVIN rises above VIN(OV), the regulator suspends opera- at or near 0V, the on-time will shorten and the off-time tion by shutting off both power MOSFETs and resetting will lengthen considerably, resulting in a lower switching the soft-start level. Once VIN drops to below the specified frequency. range of VIN(OV), the regulator immediately restarts normal operation. 36461fc 10 For more information www.linear.com/LTC3646 Document Outline Features Applications Description Typical Application Absolute Maximum Ratings Pin Configuration Order Information Electrical Characteristics Typical Performance Characteristics Pin Functions Functional Block Diagram Operation Applications Information Typical Applications Typical Application Related Parts