AP7347EQ-18FDCWR-7R

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

The AP7347EQ-18FDCWR-7R is a fixed-output low dropout regulator manufactured by Diodes Incorporated, delivering an output voltage of 1.8V with a maximum guaranteed output current of 500mA. It operates within an input voltage range of 1.7V to 5.5V and maintains a typical ripple rejection ratio of 75dB at 1kHz. The device features a low output noise of 60µVrms across the 10Hz to 100kHz bandwidth and a quiescent current as low as 75µA. Packaged in a U-DFN2020-6 (SWP) Type UXC format with code FDCWR, it includes a power-good indicator and active output discharge.

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 protection limits output current during fault conditions
• Thermal shutdown circuitry protects against overheating under excessive load

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

• Noise-sensitive equipment requiring stable power rails
• Camera modules in portable devices
• Medium-current applications with strict transient response requirements
• Servers and desktops needing high accuracy regulation

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

Verify that the specific suffix 'EQ' aligns with the manufacturer's internal grading or quality specifications, as standard datasheets typically list base part numbers like AP7347E-FDCWR-7R. Confirm package type UXC matches the required footprint. Ensure environmental compliance requirements such as RoHS and halogen-free status are met for the intended deployment region.

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

Select this component for designs requiring high PSRR and low noise in compact spaces. The 1.8V fixed output suits digital logic interfaces directly. Consider the thermal resistance of the U-DFN2020-6 package for heat dissipation needs. Verify that the 75µA quiescent current meets standby power constraints. Ensure input voltage remains above the dropout threshold for the expected load current.

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

This regulator belongs to the AP7347E series, designed for high performance in small form factors. It utilizes a CMOS process to achieve low on-resistance and high accuracy. The series supports both fixed and adjustable output voltages, catering to diverse power management needs in consumer electronics and industrial applications where space and efficiency are critical.

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

AP7347E-18FDCWR-7R

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

How does the power-good pin indicate output 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 if 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 pulled low, the active discharge connects the output to ground through an internal resistor, ensuring the output voltage discharges rapidly to a known state for reliable system startup.