7A ideal diode with reverse input protection LTC4376

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What is an ideal diode that greatly reduces voltage and power losses?

When using power sources such as batteries and AC adapters in electronic equipment, it is necessary to protect the power source from reverse currents and shoot-through currents between power sources. Also consider dynamic power supply selection and switchover when the electronic equipment is running.

Circuits to protect and control these power supplies are generally constructed with Schottky diodes, but by replacing these Schottky diodes with ideal diodes, voltage and power losses can be significantly reduced. It will be possible. Heat sinks can be removed to reduce heat generation by reducing power loss, which also contributes to a reduction in board area/height.

Here are four key features of Analog Devices' LTC4376, a 7A ideal diode with reverse input protection.

1. Significantly reduces voltage and power losses

2. Built-in MOSFET contributes to shortening design time and circuit miniaturization

3. Supports 7A output current due to low voltage and high efficiency

4. Robust design protects electrical circuits from reverse inputs

1. Significant reduction in voltage and power loss

Replacing Schottky diodes with ideal diodes can reduce voltage drop and power consumption. By reducing power consumption and heat generation, it is possible to eliminate heat sinks, making circuits more compact.

2. Built-in MOSFET contributes to shortening the design period and circuit miniaturization

The LTC4376 contains a 7A, 15mΩ N-channel MOSFET, making it an ideal diode with the highest current capability and widest voltage range. Operating current is low at only 150μA and features a shutdown mode that reduces quiescent current to 9μA.

3. Supports 7A output current with low voltage and high efficiency

The LTC4376 regulates the forward voltage drop of the internal MOSFETs to deliver current smoothly without oscillation even at light loads. The LTC4376 also has an operating range of 4V to 40V, providing a wide operating range for 2- to 9-cell Li-Ion battery stacks and standard 5V, 12V and 24V supplies.

4. Robust design to protect electrical circuits from reverse input

A robust design provides the LTC4376 with reverse input protection to –40V. This protects expensive electronic equipment from reverse input power and batteries.