Electronics Weekly Electronics Design & Components Tech News
Called NID5100, it is aimed at industrial and consumer applications, and has an automotive-qualified cousin named NID5100-Q100.
“NID5100 supports ‘OR-ing’ multiple power supplies while retaining reverse polarity protection and provides fast response time for smooth power transfer,” according to the company. “It mimics the behavior
of low voltage Schottky diodes with a fraction of the forward voltage drop and significantly lower reverse leakage current.”
It operates with 1.2 to 5.5V on the input, passing currents up to 1.5A, turning on in 165μs at 3.3V, and is protected against inputs from -6V to +6V abs max.
Outputs can be between 0.5 and 5.5V when the input is ≥1.2V.
This is a regulating-type ideal diode, whose control loop typically maintains a forward drop of 31mV when conducting (50mV max over the ambient operating range of -40 to 125°C).
Reverse blocking is activated when the output is more than 32mV above the input, with 3mV of hysteresis.
Quiescent current is 240nA with 3.3V on the input, dropping to 170nA when the ‘enable’ input is pulled low.
This is not a load switch as, even when it is disabled (/Enable=hi), the load is always fed from the input via an internal forward-biased silicon diode from input to output – hence the diode symbol in the typical application circuit diagram (left – a wired-OR power combiner).
An open-drain status output indicates high when IC is enabled and the internal mosfet is conducting, and low when the device is reverse-biased and blocking. This can be used to “control an external PMOS in a low-loss dual OR-ing application”, said Nexperia.
Find the web pages here:
Industrial/consumer NID5100, which has an evaluation board
AEC-Q100 (Grade 1) qualified automotive NID5100-Q100
http://www.nexperia.com/ideal_diode
