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2022-09-24 23:16:53
LTC1473L - Dual Switch Driver Low Voltage PowerPathTM
describe
The LTC®1473L provides reliable and efficient switching of two DC sources. The device drives two back-to-back N-channel MOSFET switches with an external set of low-voltage inputs from the power system. An internal boost regulator provides the voltage to fully boost the logic level of the N-channel MOSFET switches while an internal undervoltage lockout circuit keeps the system alive down to 2.8V. The LTC1473L senses current limiting surges between the battery and the power system during switching capacitor transitions or during fault conditions. A user-programmable timer monitors the MOSFET switching times during current limit and latches them off when the programmed turn-off time has elapsed. The unique "2-diode" logic mode ensures that the system starts regardless of which input power is received first.
Features Power Path Management System Multiple DC Power Switches and Isolated Sources from 3.3V to 10V
All N-channel switches to reduce power loss and system cost Built-in boost N-channel gate drive regulator capacitors Inrush and short circuit current limit User programmable timer to prevent Overdissipation under current limit Size: Narrow 16-pin SSOP package
Applications Portable Computers Portable Instruments Fault Tolerant Computer Batteries Backup Systems
3.3V/5V power management