Linear Technology LTC1473L
The LTC1473L senses current to limit inrush between the batteries and the system supply capacitor during switchover transitions or during fault conditions.FEATURES
s s s DESCRIPTIO s s s s s Power Path Management for Systems with Multiple DC Sources Switches and Isolates Sources from 3.3V to 10V All N-Channel Switching to Reduce Power Losses and System Cost Built-In Step-Up Regulator for N-Channel Gate Drive Capacitor Inrush and Short-Circuit Current Limited User-Programmable Timer Prevents Overdissipation During Current Limiting Undervoltage Lockout Prevents Operation with Low Inputs Small Footprint: 16-Pin Narrow SSOP The LTC®1473L provides reliable and efficient switching between two DC power sources. This device drives two external sets of back-to-back N-channel MOSFET switches to route power to the input of a low voltage system. An internal boost regulator provides the voltage to fully enhance the logic-level N-channel MOSFET switches while an internal undervoltage lock-out circuit keeps the system alive down to 2.8V. A user-programmable timer monitors the time the MOSFET switches are in current limit and latches them off when the programmed time is exceeded.