Miniature LDO ofers low noise, small footprint and accuracy

October 31, 2013 // By Graham Prophet
With a high PSRR of 75 dB at 1 kHz and a low-noise performance of 60 µVrms over the 10 Hz to 100 kHz range, the AP7340 low-dropout regulator from Diodes Incorporated ensures a high-quality supply for analogue circuits in noise-sensitive audio, video and RF applications. With its 1.0 x 1.0 mm DFN1010-4 package, the AP7340 suits high-density portable product designs.

This miniature, low-noise LDO produces a 150 mA output current for a wide input voltage range, starting from as low as 1.7V and extending up to a maximum of 5.25V. It comprises a voltage reference, error amplifier, current limit and an enable input for output on/off control. Its integrated resistor network produces fixed output voltages in 0.1V steps between 1.2V and 3.3V.

The AP7340's output voltage accuracy is higher than other solutions, with an accuracy of ±1.5% over the entire operating temperature range of -40ºC to +85ºC. This low-power LDO offers a typical quiescent current of 35 µA. It costs $0.10 (5000).