AP7343DQ-27W5-7

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

The AP7343DQ-27W5-7 is an automotive-compliant low dropout regulator with a fixed 2.7V output, manufactured by Diodes Incorporated. It operates within a 1.7V to 5.25V input voltage range and delivers up to 300mA of guaranteed output current. 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 as low as 35µA. It includes an enable pin for shutdown control and built-in discharge functionality. 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
• Integrated N-channel auto-discharge for rapid output voltage decay upon shutdown
• High PSRR and low output noise suitable for sensitive RF applications
• Enable pin allows precise on/off control and deep standby mode

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 part number suffix 'DQ' indicates the inclusion of the internal auto-discharge feature, which distinguishes it from the standard 'Q' variant. Confirm the 'W5' suffix corresponds to the SOT-25 package type required for your PCB layout. Ensure the ordering quantity aligns with the standard tape and reel packaging specifications provided by the manufacturer.

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

Select this component when designing for noise-sensitive automotive environments requiring strict change control protocols. The integrated discharge function makes it ideal for systems needing fast output voltage collapse during shutdown states. Verify that the 2.7V fixed output matches the target load requirements and that the SOT-25 footprint fits within the available board space constraints.

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

This device belongs to the AP7343Q family of low dropout regulators designed specifically for automotive applications. It shares core electrical characteristics with other variants in the series but is distinguished by its specific output voltage and the inclusion of the auto-discharge circuitry. The family is manufactured in IATF 16949 certified facilities to meet automotive quality standards.

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

AP7343Q-27W5-7

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

What is the difference between AP7343Q and AP7343DQ?

The AP7343DQ variant includes an internal N-channel auto-discharge resistor that rapidly pulls the output voltage to ground when the enable pin is deactivated. The standard AP7343Q lacks this discharge feature.

How does the enable pin function?

Driving the EN pin high turns the regulator on, while pulling it low activates the shutdown mode. In shutdown mode, the device draws minimal standby current and, for the DQ variant, actively discharges the output capacitor.