LTC Intros New LTC4413 Two-Channel Ideal Diode

Linear Technology Corp. (LTC, Milpitas, CA) introduced its new LTC4413, a two-channel ideal diode designed to reduce heat, voltage drop and board space as well as preserve battery life. The LTC4413 is designed for use in handheld products, systems with a USB interface or backup battery.

Equipped with several intelligent circuits, the LTC4413 has control access to each ideal diode - allowing for adjustment of the switchover voltage - and indicates whether the selected ideal diode is conducting. It also offers current limit and thermal protection as well as slow turn-off to protect against voltage spikes.

A thermally enhanced 3 mm x 3 mm DFN package permits each channel to deliver up to 2.6 from an input supply ranging from 2.5 V to 5.5 V. The LTC4413 offers a low forward voltage of 80 mV at 500 mA and 210 mV at 2 A, and only 1 µA of leakage current. The LTC4413 contains two 100 mΩ p-channel MOSFETs. Quiescent current is less than 40 µA for output currents up to 1 A. If either of the output voltages exceeds the respective input voltages, that MOSFET is turned off and less than 1 µA of reverse current will flow from OUT to IN. Maximum forward current in each MOSFET is limited to a constant 2.6 A and internal thermal limiting circuits protect the part during fault conditions. A 9 µA open-drain STAT pin indicates conduction status of the selected channel and can also be used to drive an external p-channel MOSFET to control a third alternate power source.

The LTC4413 is rated for operation from -40 ° to +85 °C, and is housed in a 10-lead, 3 mm x 3 mm DFN. Pricing for 1,000-piece quantities starts at $2.15 each.