Features

• Dual 50mΩ Monolithic Ideal Diodes
• 1.7V to 5.5V Operating Range
• Up to 4A Adjustable Current Limit for Each Diode
• Low Reverse Leakage Current (1μA Max)
• 15mV Forward Drop in Regulation
• Smooth Switchover in Diode ORing
• Load Current Monitor
• Precision Enable Thresholds to Set Switchover
• Soft-Start to Limit Inrush Current on Start-Up
• Status Pins to Indicate Forward Diode Conduction
• Current and Thermal Limit with Warning
• Thermally Enhanced 16-Lead MSOP and DFN (3mm × 5mm) Packages

Typical Application

Description

The LTC®4415 contains two monolithic PowerPath ideal diodes, each capable of supplying up to 4A with typical forward conduction resistance of 50mΩ. The diode voltage drops are regulated to 15mV during forward conduction at low currents, extending the power supply operating range and ensuring no oscillations during supply switchover. Less than 1μA of reverse current flows from OUT to IN making this device well suited for power supply ORing applications.

The two ideal diodes are independently enabled and prioritized using inputs EN1 and EN2. The output current limits can be adjusted independently from 0.5A to 4A using resistors on the CLIM pins. Furthermore, the ideal diode currents can be monitored via CLIM pin voltages.

Open-drain status pins indicate when the ideal diodes are forward conducting. When the die temperature approaches thermal shutdown, or if the output load exceeds the current limit threshold, the corresponding warning pins are pulled low.