DESCRIPTION

The LTC®4416/LTC4416-1 control two sets of external P-channel MOSFETs to create two near ideal diode functions for power switchover circuits. This permits highly efficient OR’ing of multiple power sources for extended battery life and low self heating. When conducting, the voltage drop across the MOSFET is typically 25mV. For applications with a wall adapter or other auxiliary power source, the load is automatically disconnected from the battery when the auxiliary source is connected.

FEATURES

■ Designed Specifically to Drive Large and Small QG
PFETs
■ Very Low Loss Replacement for Power Supply
OR’ing Diodes
■ Wide Operating Voltage Range: 3.6V to 36V
■ –40°C to 125°C Operating Temperature Range
■ Reverse Battery Protection
■ Automatic Switching Between DC Sources
■ Low Quiescent Current: 35µA per Channel
■ Load Current Sharing
■ MOSFET Gate Protection Clamp
■ Precision Input Control Comparators for Setting
Switchover Threshold Points
■ Open-Drain Feedback Points for Customer Specified
Hysteresis Control
■ Minimal External Components
■ Space Saving 10-Lead MSOP Package

APPLICATIONS

■ High Current PowerPath Switch
■ Industrial and Automotive Applications
■ Uninterruptible Power Supplies
■ Logic Controlled Power Switch
■ Battery Backup System
■ Emergency Systems with Battery Backups