AP7353D-28FS4-7

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

The AP7353D-28FS4-7 is a fixed-output low dropout regulator manufactured by Diodes Incorporated, providing a nominal output voltage of 2.8V with an accuracy of ±1%. It supports a guaranteed output current of 250mA and operates within an input voltage range of 2.0V to 5.5V. The device features a typical quiescent current of 18µA and offers high ripple rejection of 90dB at 1kHz. Packaged in the X2-DFN1010-4 (Type B) format, it includes an integrated enable pin and built-in output discharge functionality.

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

• Integrated N-channel auto-discharge resistor for rapid output voltage decay when disabled
• High power supply ripple rejection ratio ensuring stable operation under noisy conditions
• Ultra-low output noise characteristics suitable for sensitive analog and RF circuits
• Built-in thermal shutdown and current limit protection mechanisms

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

• RF power supplies
• Smartphones and tablets
• Portable video devices
• Wireless communication equipment

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

Verify that the specific part number suffix FS4 corresponds to the X2-DFN1010-4 package type and confirm the 'D' designation indicates the inclusion of the output discharge feature. Ensure compatibility with standard surface mount assembly processes and verify RoHS compliance status through official manufacturer documentation prior to procurement.

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

Select this component for designs requiring a compact footprint and precise 2.8V regulation. The X2-DFN1010-4 package is optimal for space-constrained PCB layouts. Consider the 18µA quiescent current for battery-powered applications and utilize the enable pin for system power management control.

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

This component belongs to the AP7353 series of low dropout regulators from Diodes Incorporated. The series is designed for handheld and wearable communication equipment requiring stable voltage sources. The AP7353D variant specifically incorporates an output discharge feature not present in the standard AP7353 model.

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

AP7353-28FS4-7

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

What is the function of the 'D' suffix in the AP7353D-28FS4-7 part number?

The 'D' suffix indicates that the device includes an integrated N-channel auto-discharge resistor, which rapidly discharges the output capacitor when the enable pin is pulled low.

How does the AP7353D-28FS4-7 handle short-circuit conditions?

The device incorporates short-circuit protection that clamps the output current to approximately 350mA, protecting the regulator from overcurrent and overheating damage.