AP7347E-29FDCW-7R

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

The AP7347E-29FDCW-7R is a fixed-output low dropout regulator manufactured by Diodes Incorporated, providing a precise 2.9V output voltage. It operates within an input voltage range of 1.7V to 5.5V and guarantees a continuous output current of 500mA. The device features high power supply rejection ratio (PSRR) of 75dB at 1kHz and low output noise of 60µVrms from 10Hz to 100kHz. Quiescent current is specified as low as 75µA. It includes integrated thermal shutdown, short-circuit protection with fold-back current limiting, and an active output discharge function.

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

• Integrated power-good indicator for supply monitoring and sequencing
• High output voltage accuracy maintained across the full operating temperature range
• Active output discharge ensures known system startup states when disabled
• Fold-back current limit protects against overcurrent and overheating

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

• Noise-sensitive equipment requiring stable power rails
• Desktops and notebooks
• Servers and gaming consoles
• Camera modules

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

Verify that the package code FDCW corresponds to the U-DFN2020-6 (SWP) Type UXC footprint on your PCB layout. Confirm the presence of the exposed pad connection requirements for thermal dissipation. Ensure the EN pin is driven correctly to maintain the regulator in the enabled state during operation.

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

Select this component when a fixed 2.9V rail is required with high PSRR and low noise characteristics. The U-DFN2020-6 package offers a compact solution suitable for space-constrained designs. Consider the thermal resistance values if the application involves significant power dissipation or elevated ambient temperatures.

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

This part belongs to the AP7347E series of 500mA LDO regulators featuring a power-good indicator. Unlike the AP7347DQ which lacks the PG pin, the AP7347E provides open-drain power-good signaling. It is designed for CMOS processes and supports both fixed and adjustable output configurations depending on the suffix.

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

AP7347E-29FDCWR-7R (Reel variant of same package)

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

How does the Power-Good (PG) pin indicate status?

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

What is the function of the NC pins in the U-DFN2020-6 package?

The No Connect (NC) pins are not connected internally but should be connected to GND on the PCB to maximize copper area for thermal dissipation.