AP7347EQ-17FDCW-7R

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

The AP7347EQ-17FDCW-7R is a fixed-output low dropout regulator manufactured by Diodes Incorporated, delivering a precise 1.7V output with a guaranteed maximum current of 500mA. It operates within an input voltage range of 1.7V to 5.5V and maintains ±1% output accuracy across the -40°C to +125°C temperature range. The device features a 75dB ripple rejection at 1kHz and a low output noise of 60µVrms from 10Hz to 100kHz. It includes 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 ensures known system state upon disablement
• Fold-back short-circuit current limit protects against overcurrent conditions
• Thermal shutdown prevents damage during overheating events

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

• Noise-sensitive equipment requiring stable 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 when sourcing components. Confirm that the 'E' designation aligns with the required automotive or industrial qualification standards if applicable. Ensure the FDCW package code matches the intended PCB footprint requirements. Cross-reference the manufacturer's datasheet revision history to validate electrical characteristics against the production batch.

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

Select this component for applications demanding high power-supply rejection ratio and low output noise. The 1.7V fixed output eliminates the need for external resistor dividers used in adjustable versions. Verify that the input voltage remains above the dropout threshold under maximum load conditions. Consider the thermal resistance of the U-DFN2020-6 package when designing heat dissipation paths for high-power scenarios.

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 compact form factors. The series supports both fixed and adjustable output voltages ranging from 1.0V to 5.0V. It utilizes a CMOS process to achieve low quiescent current and high efficiency. The device is available in multiple package options including U-DFN2020-6 and V-DFN3030-8 to suit various density requirements.

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

AP7347E-17FDCW-7R

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

How does the power-good pin function?

The power-good pin is an open-drain output that goes into a high-impedance state when the output voltage exceeds the high threshold and pulls low when the output drops below the low threshold or the device is disabled.

What is the purpose of the active output discharge feature?

The active output discharge ensures that the output capacitor discharges rapidly when the enable pin is pulled low, guaranteeing a known startup state for the system.