AP7343DQ-33W5-7

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

The AP7343DQ-33W5-7 is an automotive-compliant low dropout regulator manufactured by Diodes Incorporated. It provides a fixed 3.3V output with a guaranteed current of 300mA and operates within an input voltage range of 1.7V to 5.25V. The device features high power supply rejection ratio (PSRR) of 75dB at 1kHz and low output noise of 60µVrms from 10Hz to 100kHz. Quiescent current is typically 35µA, with standby current as low as 0.01µA. It includes integrated thermal shutdown, current limit protection, and an enable pin for control. The component is housed in a SOT-25-5 package and supports an operating temperature range from -40°C to +125°C.

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

• Automotive compliant with AEC-Q100 qualification and PPAP capability for specific change control requirements.
• Integrated N-channel auto-discharge function to rapidly pull the output voltage low when disabled.
• High ripple rejection and low output noise characteristics suitable for sensitive RF and infotainment applications.
• Includes enable control, thermal shutdown, and foldback short-circuit protection for robust system operation.

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 that the specific part number suffix matches the required discharge configuration and package type. Confirm AEC-Q100 Grade 1 qualification status if automotive compliance is mandatory. Ensure the ordering suffix corresponds to the correct tape and reel packaging quantity. Cross-reference the manufacturer's latest datasheet revision to confirm electrical parameters have not changed.

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

Select this variant over the non-discharge version when rapid output voltage decay is required after shutdown. Verify that the input voltage remains within the specified 1.7V to 5.25V range under all load conditions. Consider the thermal resistance of the SOT-25 package for heat dissipation in dense PCB layouts. Ensure the enable pin logic levels are compatible with the controlling microcontroller or system bus.

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

This component belongs to the AP7343Q family of low dropout regulators designed for automotive environments. It shares core electrical specifications with other variants in the series but differs in output voltage, discharge functionality, and package options. The 'D' suffix indicates the inclusion of an internal auto-discharge resistor, distinguishing it from standard AP7343Q models.

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

AP7343Q-33W5-7

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

What is the difference between AP7343Q and AP7343DQ?

The AP7343DQ includes an integrated N-channel auto-discharge resistor that pulls the output voltage low when the device is disabled. The standard AP7343Q does not have this feature.

Is the AP7343DQ-33W5-7 qualified for automotive applications?

Yes, the AP7343Q family is AEC-Q100 Grade 1 qualified and classified as Automotive Compliant, supporting PPAP documentation.