Components

300mA LDO with 3.2V to 18V Input has 1.5µA Quiescent Current

The AP7370 from Diodes Incorporated is an extremely low quiescent current, positive voltage regulator with a maximum input voltage of 18V.

In addition, the AP7370 has high accuracy and reverse-current protection which make it suitable for use in various USB and portable devices and instrument applications.

Typical applications for the LDO include battery-powered equipment, portable instrumentation, metering, laptops, notebooks, weighing scales, and appliances.

Related: Single-Cell Charger IC with Power-Path Management and 3.6A Boost Output

Input voltage ranges from 3.2V to 18V. It covers 5V, 9V, and 12V power rails with good transient withstand. Output voltages of 1.2V, 1.5V, 1.8V, 2.8V, 3.0V, 3.3V, 3.6V, and 5.0V cover standard I/O voltage levels.

Typical application diagram (Click on image to enlarge)

A low quiescent current of 1.5µA minimizes standby power in low-power systems and extends battery life.

The LDO maintains a 1.0% output accuracy at temperatures of -40ºC to +85ºC.

It includes a built-in current limit function and has short-circuit and over-current protection features.

(Click on chart to enlarge)

Features
  • Input Voltage: 3.2V to 18V Covers 5V, 9V, and 12V power rails with good transient withstand
  • Output Voltages: 1.2V, 1.5V, 1.8V, 2.8V, 3.0V, 3.3V, 3.6V, and 5.0V Covers standard I/O voltage levels
  • Low Quiescent Current at 1.5µA Minimizes standby power in low-power systems and extends battery life
  • 1.0% Output Accuracy at -40ºC to +85ºC Temperature Maintains accuracy under all conditions
  • Built-In Current Limit Function Short-circuit and overcurrent protection features

The AP7370 comes in 1.2V, 1.5V, 1.8V, 2.8V, 3.0V, 3.3V, 3.6V, and 5.0V fixed output voltage versions, and the LDO is available in SOT23, SOT25, SOT89, and DFN2020-6 packages.

Diodes Incorporated
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