AP7347E-17FDCW-7R

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

The AP7347E-17FDCW-7R is a fixed-output low dropout regulator manufactured by Diodes Incorporated, providing a stable 1.7V output with a guaranteed maximum load current of 500mA. It operates within an input voltage range of 1.7V to 5.5V and maintains a tight output voltage accuracy of ±1%. The device features a high ripple rejection ratio of 75dB at 1kHz and delivers a low output noise of 60µVrms across the 10Hz to 100kHz bandwidth. Quiescent current is specified as low as 75µA. It incorporates a power-good indicator, active output discharge, and thermal shutdown protection, housed in a U-DFN2020-6 (SWP) package.

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

• Integrated power-good open-drain output for supply monitoring and sequencing
• Active output discharge function ensures known system startup states when disabled
• Fold-back short-circuit current limit protects against overcurrent and overheating
• Thermal shutdown circuitry disables output at elevated junction temperatures

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

• Noise-sensitive equipment requiring clean power rails
• Desktops and notebooks
• Servers
• Gaming consoles
• Camera modules

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

Verify the specific ordering suffix '7R' corresponds to tape-and-reel packaging containing 3000 units per carrier. Confirm that the 'FDCW' package code matches the required U-DFN2020-6 footprint for your PCB layout. Ensure the fixed 1.7V output aligns with your target load requirements before finalizing procurement orders.

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

Select this component when a fixed 1.7V rail is required with high PSRR and low noise characteristics. The U-DFN2020-6 package offers a compact solution for space-constrained designs. Consider the 75µA quiescent current for standby power efficiency. Verify that the 500mA output capability meets peak load demands without exceeding thermal limits under worst-case ambient conditions.

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

This part belongs to the AP7347E series of low dropout regulators designed for high performance in noise-sensitive applications. Unlike the AP7347DQ which lacks a power-good pin, the AP7347E includes integrated supply monitoring. The series supports both fixed and adjustable output voltages, utilizing CMOS process technology for low power consumption and fast transient response.

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

AP7347E-17FDCWR-7R serves as a direct replacement if the alternate U-DFN2020-6R package variant is preferred. Both parts share identical electrical specifications and pinouts but differ in physical package dimensions.

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 that goes into a high-impedance state when VOUT exceeds the high threshold and is pulled low by an internal MOSFET when VOUT drops below the low threshold or the device is disabled.

What is the purpose of the active output discharge feature?

When the enable pin is driven low, the active output discharge connects the output to ground through an internal N-channel MOSFET, ensuring the output discharges rapidly to a known state for reliable system startup.