AP7353D-32FS4-7

Voltage Regulators - Linear, Low Drop Out (LDO) Regulators Overview

The AP7353D-32FS4-7 is a fixed-output low dropout regulator manufactured by Diodes Incorporated, providing a nominal output voltage of 3.2V with a guaranteed maximum output current of 250mA. It operates within an input voltage range of 2.0V to 5.5V and features high power supply rejection ratio (PSRR) performance, achieving 90dB at 1kHz and 70dB at 10kHz under specified load conditions. The device incorporates an integrated auto-discharge circuit for rapid output voltage decay upon shutdown. Packaged in the X2-DFN1010-4 form factor, it maintains a typical quiescent current of 18µA and delivers an output voltage accuracy of ±1% across the operating temperature range.

Voltage Regulators - Linear, Low Drop Out (LDO) Regulators Feature Summary

• Integrated enable pin allows precise control over regulator activation and standby modes
• Built-in N-channel auto-discharge resistor rapidly removes charge from the output capacitor when disabled
• High ripple rejection capability ensures stable operation in noise-sensitive RF and communication circuits
• Low dropout design enables efficient power conversion even when input voltage approaches the output level

Voltage Regulators - Linear, Low Drop Out (LDO) Regulators Applications

• RF power supplies requiring low noise and high PSRR
• Smartphones and portable tablets
• Cameras and portable video equipment
• Wireless adaptors and communication modules

Voltage Regulators - Linear, Low Drop Out (LDO) Regulators Procurement Notes

Verify that the specific part number suffix matches the required package type and discharge functionality. Confirm compliance with RoHS and REACH directives as stated in the manufacturer documentation. Ensure the ordering quantity aligns with standard tape and reel packaging specifications provided by the supplier.

Voltage Regulators - Linear, Low Drop Out (LDO) Regulators Selection Notes

Select this component when a fixed 3.2V rail is required alongside strict noise suppression standards. The inclusion of the enable pin and auto-discharge feature makes it suitable for battery-powered systems requiring active power management. Verify that the PCB layout accommodates the thermal requirements of the X2-DFN1010-4 package.

Voltage Regulators - Linear, Low Drop Out (LDO) Regulators Part Context

This device belongs to the AP7353 series of low dropout regulators designed for handheld and wearable applications. The 'D' suffix indicates the presence of an internal auto-discharge mechanism on the output pin, distinguishing it from non-discharge variants. The FS4 suffix identifies the specific X2-DFN1010-4 surface-mount package configuration.

Voltage Regulators - Linear, Low Drop Out (LDO) Regulators Replacement Considerations

AP7353-32FS4-7

Voltage Regulators - Linear, Low Drop Out (LDO) Regulators FAQ

What is the function of the EN pin?

The EN pin controls the state of the regulator; driving it high enables the output, while pulling it low activates the shutdown mode.

How does the D suffix affect the component's behavior?

The D suffix denotes that the regulator includes an integrated N-channel auto-discharge resistor, which actively pulls down the output voltage when the device is disabled.