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Wide input voltage regulator has low quiescent current

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By Nick Flaherty


The AP7381 is aimed at a variety of applications from USB and portable devices to energy meters and home automation. It has fixed output voltages of 3.3V or 5V to power standard logic device supplies and I/O levels and can operate from an input voltage between 3.3V and 40V, which covers most common system power rails.

The device provides excellent line and load regulation and features a low dropout voltage of typically 1000mV for a 3.3V output device operating at an output current of 100mA. An internal voltage reference ensures output accuracy at room temperature is maintained within ±2%.

A low quiescent current of 2.5µA minimises standby power in low-power systems and extends the life of battery-operated products, and the AP7381 has a built-in current limit and an over-temperature protection (OTP) function and also features over-current protection, provided by an internal current limit circuit.

The AP7381 is available in a SOT89 package (on tape & reel) and in a TO92 package (ammo packed) and is priced at $0.10 each in 1000 piece quantities.

www.diodes.com


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