AP7347EQ-28FDCW-7R

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

The AP7347EQ-28FDCW-7R is a low dropout regulator manufactured by Diodes Incorporated, featuring high output voltage accuracy and low noise. It operates within an input voltage range of 1.7V to 5.5V and guarantees an output current of 500mA. The device provides a fixed 2.8V output with ±1% accuracy. Key electrical parameters include a ripple rejection of 75dB at 1kHz, an output noise of 60µVrms from 10Hz to 100kHz, and a quiescent current as low as 75µA. It incorporates a power-good indicator and active output discharge.

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

• Integrated power-good (PG) open-drain output for supply monitoring and sequencing
• Active output discharge ensures known system startup state when disabled
• Fold-back short-circuit current limit protects against overcurrent and overheating
• Thermal shutdown protection disables output at approximately +170°C

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

• Desktops and notebooks
• Servers
• Gaming consoles
• Camera modules
• Medium-current, noise-sensitive applications

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

Verify the specific ordering suffix '7R' corresponds to the tape and reel packaging format required for automated assembly processes. Confirm that the FDCW package code matches the U-DFN2020-6 footprint on the target PCB layout. Ensure the fixed 2.8V output specification aligns precisely with the load requirements before finalizing procurement orders.

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

Select this component for designs requiring a stable 2.8V rail with minimal noise in compact spaces. The U-DFN2020-6 package offers a small footprint suitable for space-constrained portable electronics. Consider the 75µA quiescent current for battery-powered applications where standby power consumption is critical. Verify thermal dissipation capabilities based on the expected ambient temperature and load conditions.

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

This part belongs to the AP7347E series of low dropout regulators designed for noise-sensitive equipment. It utilizes a CMOS process to achieve low RDS(ON) and low quiescent current. The series includes both fixed and adjustable output voltage versions, packaged in U-DFN2020-6 and V-DFN3030-8 formats. It is intended for general-purpose power management in consumer and industrial electronics.

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

AP7347E-28FDCW-7R

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

How does the Power-Good (PG) pin function?

The PG pin is an open-drain output that goes into a high-impedance state when VOUT exceeds the PG threshold. If VOUT drops below the threshold or the device is disabled, the pin is pulled low by an internal MOSFET.

What is the purpose of the EN pin?

The Enable (EN) pin controls the operation of the regulator. Driving it high turns the regulator on, while pulling it low puts the device into shutdown mode. It must not be left floating.

How is short-circuit protection implemented?

When the VOUT pin is shorted to GND, the short-circuit protection triggers and clamps the output current to approximately 180mA, protecting the regulator from damage due to overheating.