AP7343DQ-29FDZW-7

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

The AP7343DQ-29FDZW-7 is an automotive-compliant low dropout regulator manufactured by Diodes Incorporated. It provides a fixed 2.9V output with ±1% accuracy and supports up to 300mA load current. The device operates within a 1.7V to 5.25V input range and features a W-DFN2020-6 (SWP) Type A1 package. Key electrical characteristics include a typical ripple rejection of 75dB at 1kHz, low output noise of 60µVrms from 10Hz to 100kHz, and quiescent current as low as 35µA. It includes built-in discharge functionality, thermal shutdown, and short-circuit protection.

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

• Automotive compliant with AEC-Q100 qualification and PPAP capability for strict change control requirements.
• Integrated N-channel auto-discharge resistor ensures rapid output voltage decay when disabled.
• High power supply ripple rejection minimizes noise impact on sensitive downstream circuits.
• Low output noise performance suitable for RF and precision analog applications.

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

• Infotainment power supplies
• Automotive RF supplies
• Cameras
• Automotive POL in ADAS
• Automotive wireless communications

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

Verify the specific suffix FDZW corresponds to the W-DFN2020-6 (SWP) Type A1 package configuration. Confirm that the DQ designation indicates the inclusion of the internal auto-discharge feature, which affects shutdown behavior compared to non-discharge variants. Ensure compatibility with IATF 16949 certified manufacturing processes required for automotive compliance.

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

Select this component for designs requiring high voltage accuracy and low noise in space-constrained automotive environments. The W-DFN2020-6 package offers a small footprint for dense PCB layouts. Consider the built-in discharge feature if fast output settling is required upon disable. Verify input voltage ranges accommodate system transients up to 5.25V.

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

This part belongs to the AP7343Q family of low dropout regulators designed for automotive applications. The series offers various fixed output voltages and package options including SOT25 and W-DFN2020-6. The AP7343DQ variant specifically integrates an auto-discharge function, distinguishing it from the standard AP7343Q model which lacks this feature.

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

AP7343Q-29FDZW-7

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

What is the function of the EN pin?

The Enable pin controls the regulator state; driving it high activates the output, while pulling it low initiates shutdown mode and engages the internal discharge resistor.

How does the AP7343DQ differ from the AP7343Q?

The primary difference is the integrated auto-discharge feature in the AP7343DQ, which actively pulls down the output voltage when the device is disabled.