AP7347DQ-28FDZW-7B

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

The AP7347DQ-28FDZW-7B is an automotive-compliant low dropout regulator manufactured by Diodes Incorporated. It provides a fixed 2.8V output with ±1% accuracy and supports up to 500mA of guaranteed output current. The device operates within a wide input voltage range of 1.7V to 5.5V and features a ripple rejection of 75dB at 1kHz. It utilizes a W-DFN2020-6 (SWP) package for high power density.

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

• AEC-Q100 qualified for automotive applications with PPAP capability
• Integrated enable pin with active discharge function for controlled shutdown
• Includes thermal shutdown and fold-back short-circuit protection

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

• Infotainment power supplies
• Automotive RF supplies
• ADAS point-of-load regulation
• Automotive wireless communication systems

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

Verify the specific suffix '7B' against official documentation, as standard listings often reference the '-7' variant. Confirm that the W-DFN2020-6 wettable flank package meets your PCB assembly requirements. Ensure the ordering code matches the exact 2.8V fixed output version required for your circuit design.

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

Select this component when designing noise-sensitive automotive circuits requiring high PSRR and low output noise. The integrated resistor network simplifies design by providing fixed voltages. Verify that the input voltage remains within the 1.7V to 5.5V range and that the load does not exceed the 500mA guarantee under all operating conditions.

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

This part belongs to the AP7347DQ series of high PSRR LDOs designed for automotive environments. It is produced in IATF 16949 certified facilities. The series offers various fixed output voltages from 1.0V to 5.0V in both SOT25 and W-DFN2020-6 packages to suit different footprint constraints.

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

The AP7347DQ-28FDZW-7 is the standard reel variant. Verify if the 'B' suffix indicates a specific packaging or compliance update before substitution. Other fixed voltage variants like AP7347DQ-33FDZW-7 share the same package but differ in output voltage.

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

What is the purpose of the EN pin?

The EN pin enables or disables the regulator. Driving it high turns the device on, while pulling it low activates the internal active discharge to ensure a known system startup state.

How does the device handle short circuits?

It includes short-circuit protection that clamps the output current to approximately 180mA via a fold-back mechanism to prevent damage during overcurrent events.