LDO for noise-sensitive applications

29 July 2020 Power Electronics / Power Management

Diodes Incorporated announced the AP7353 low dropout (LDO) regulator, which offers a high power supply rejection ratio (PSRR) in a small package, meeting the need for voltage regulation in noise-sensitive, battery operated devices such as wearables, portables, and connected sensors.

The AP7353 is available in X1-WLB0707-4 (Type A1) and X2-DFN1010-4 (Type B) packages, each measuring less than 1 mm on each side. These dimensions result in a small footprint that supports densely populated printed circuit board layouts. Despite its size, the AP7353 delivers the voltage and current levels demanded by the latest electronic devices now being deployed into the IoT, up to 4,5 V at 250 mA.

A PSRR of 90 dB at 1 kHz and low quiescent current of 18 μA make the AP7353 particularly suitable for battery powered devices that include noise-sensitive analog circuits or RF interfaces. The AP7353’s high PSRR and its 10 µV wideband noise voltage help support a high signal-to-noise ratio. These attributes position the AP7353 as a leading LDO regulator in this application space.

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