Positive voltage regulator delivers ultra-low quiescent current with high accuracy

Diodes Incorporated has introduced the AP7381, a positive voltage regulator that delivers ultra-low quiescent current and high accuracy. It is well-suited for use in many applications, ranging from USB and portable devices to energy meters and home automation. The device offers fixed output voltages of 3.3V or 5V to power standard logic device supplies and I/O levels and can operate between 3.3V and 40V input voltage, which covers most common system power rails. The device gives excellent line and load regulation and offers 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 just 2.5µA minimises standby power in low-power systems and extends the life of battery-operated products. The device has a built-in current limit and an OTP function and also features over-current protection, provided by an internal current limit circuit.