AP7347DQ-33FDZW-7B

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

The AP7347DQ-33FDZW-7B is an automotive-compliant low dropout regulator featuring a fixed 3.3V output with ±1% accuracy. It operates within a 1.7V to 5.5V input range and delivers up to 500mA of output current. Key electrical specifications include a ripple rejection of 75dB at 1kHz, low output noise of 60µVrms (10Hz–100kHz), and quiescent current as low as 60µA. The device includes thermal shutdown and short-circuit protection, housed in a WDFN2020-6 package.

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

• Automotive AEC-Q100 qualified for high reliability applications
• Integrated enable pin for power management control
• Low noise design suitable for sensitive RF circuits
• Built-in thermal shutdown and fold-back current limiting

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

• Infotainment power supplies
• Automotive RF supplies
• Cameras
• Automotive POL in ADAS
• Automotive wireless communication systems

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

Verify the specific suffix FDZW corresponds to the WDFN2020-6 wettable pad package type required for your PCB layout. Confirm that the -7B packaging designation matches your automated assembly equipment specifications. Ensure the 3.3V fixed output voltage aligns with your system's power rail requirements before finalizing procurement orders.

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

Select this component when designing for noise-sensitive automotive environments requiring precise voltage regulation. The WDFN2020-6 package offers a compact footprint for dense layouts. Consider the 60µA quiescent current for battery-powered subsystems. Verify input voltage stability remains above the dropout threshold under maximum load conditions to maintain regulation accuracy.

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

This part belongs to the AP7347DQ family of CMOS low dropout regulators manufactured by Diodes Incorporated. The series is designed for automotive compliance, meeting IATF 16949 standards. The specific model utilizes the WDFN2020-6 package variant, distinguishing it from SOT25 versions while maintaining identical electrical performance characteristics across the product line.

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

Direct substitutes within the same family include AP7347DQ-33W5-7B for SOT25 packaging or AP7347DQ-33FDZW-7 for standard WDFN2020-6 without the B suffix. Verify package compatibility and lead-free status when cross-referencing with other manufacturers' LDOs offering similar 3.3V outputs and 500mA capabilities.

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

What is the function of the EN pin on the AP7347DQ?

The EN pin controls the regulator's operation; driving it high enables the output, while pulling it low activates shutdown mode. It must not be left floating.

How does the AP7347DQ handle short-circuit conditions?

The device features fold-back short-circuit protection that clamps the output current to approximately 180mA typ when VOUT is shorted to ground, preventing damage.

Is the AP7347DQ-33FDZW-7B RoHS compliant?

Yes, the device is totally lead-free, fully RoHS compliant, and halogen and antimony free.