AP7343DQ-10FDZW-7

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

The AP7343DQ-10FDZW-7 is an automotive-compliant low dropout regulator manufactured by Diodes Incorporated. It provides a fixed 1.0V output with a guaranteed maximum current of 300mA. The device operates within an input voltage range of 1.7V to 5.25V and supports an ambient temperature range from -40°C to +125°C. It features high ripple rejection of 75dB at 1kHz, low output noise of 60µVrms, and a quiescent current as low as 35µA. The component includes an enable pin and built-in auto-discharge functionality, packaged in a W-DFN2020-6 (SWP) Type A1 format.

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 that actively pulls the output to ground when disabled
• High power supply ripple rejection and ultra-low output noise suitable for sensitive RF applications
• Includes thermal shutdown and foldback short-circuit protection for enhanced system reliability

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 the DQ designation indicates the inclusion of the internal discharge feature. Ensure the Q suffix confirms AEC-Q100 Grade 1 qualification. Validate that the ordering code matches the required 1.0V fixed output voltage before finalizing procurement specifications.

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

Select this variant when a compact footprint with integrated output discharge is required for automotive designs. The W-DFN2020-6 package offers superior thermal dissipation compared to smaller alternatives. Verify that the 1.0V output aligns with downstream load requirements. Consider the 300mA current limit and low dropout characteristics for efficient power management in battery-operated systems.

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

This component belongs to the AP7343Q family of low dropout regulators designed specifically for automotive environments. The series emphasizes high accuracy and low noise to support complex electronic architectures in modern vehicles. The AP7343DQ variant distinguishes itself through the addition of an internal discharge mechanism, ensuring safe output voltage decay upon shutdown.

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

AP7343Q-10FDZW-7

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

What is the function of the 'D' suffix in the part number?

The 'D' suffix indicates that the regulator includes an internal N-channel auto-discharge resistor, which actively pulls the output voltage to ground when the enable pin is driven low.

How does the AP7343DQ-10FDZW-7 handle short circuits?

The device incorporates foldback short-circuit protection that clamps the output current to approximately 60mA when the output is shorted to ground, protecting the regulator from overheating.