DESCRIPTION
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.

FEATURES
■ 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

APPLICATIONS
■ Portable Computers
■ Portable Instruments
■ Fault Tolerant Computers
■ Battery-Backup Systems
■ 3.3V/5V Power Management