DC2705A: 12V @ 7A, Ideal Diode with Reverse Input Protection

Summary

Demonstration circuit 2705A showcases the LTC4376 ideal diode controller with integrated MOSFET and reverse input protection up to –40V. The LTC4376 has a current capability of 7A. The board includes two independent LTC4376 ideal diode circuits sharing a common ground and operating over a range of 4V to 40V.

The LTC®4376 is a 7A ideal diode that uses an internal 15mΩ N-channel MOSFET to replace a Schottky diode when used in diode-OR and high current diode applications. The LTC4376 reduces power consumption, heat dissipation and PC board area. The LTC4376 controls the forward voltage drop across the internal MOSFET to ensure smooth current delivery without oscillation even at light loads. If a power source fails or is shorted, a fast turn-off minimizes reverse current transients.

The LTC4376 also easily ORs power sources to increase total system reliability. With its low operating voltage, small solution size and the ability to withstand reverse input voltage, the LTC4376 excels in portable battery applications. A shutdown mode is available to reduce the quiescent current to 9μA. The SHDN pin can also control the forward current path when an external MOSFET is used in series with the internal MOSFET in a back-to-back configuration.

Specifications

Manufacturer	Analog Devices Inc.
Category	Power Management
Sub-Category	OR-ing Controllers
Eval Board Part Number	505-DC2705A-ND
Eval Board Supplier	Analog Devices Inc.
Eval Board	Normally In Stock
Current Out	7 A
Voltage Out	12 V
Supply Voltage	4 ~ 40 V
Features	Reverse Polarity Protection Shutdown, Enable, Standby
Quiescent Current [Typical]	150 µA
Component Count + Extras	36 + 14
Application / Target Market	Automotive Computer Peripherals Portable Devices Servers UPS
Design Author	Linear Technology
Quiescent Current [Maximum]	150 µA
Main I.C. Base Part	LTC4376
Date Created By Author	2018-03
Date Added To Library	2019-07