AP7343DQ-28W5-7

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

The AP7343DQ-28W5-7 is an automotive-compliant low dropout regulator manufactured by Diodes Incorporated. It provides a fixed 2.8V 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. Key electrical characteristics include a quiescent current of 35µA, ripple rejection of 75dB at 1kHz, and output noise of 60µVrms. It features integrated short-circuit protection, thermal shutdown, and an enable pin for power control.

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

• Automotive compliant with AEC-Q100 qualification and PPAP capability
• Integrated auto-discharge circuit to rapidly pull down the output voltage when disabled
• High power supply ripple rejection and low output noise for sensitive applications
• Built-in enable control, short-circuit protection, and thermal shutdown

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 package type and discharge configuration. Confirm compliance with automotive quality standards such as AEC-Q100 and IATF 16949 manufacturing requirements. 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 for designs requiring strict automotive reliability and high noise immunity. The integrated discharge feature distinguishes it from non-discharge variants, making it suitable for systems requiring rapid output voltage decay. Verify that the input voltage remains within the specified operating range to ensure stable regulation under all load conditions.

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 environments. It utilizes a CMOS process to achieve low power consumption while maintaining high performance. The 'D' in the model name indicates the inclusion of an internal auto-discharge resistor, differentiating it from the standard AP7343Q series.

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

AP7343Q-28W5-7 (Non-discharge variant)

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

What is the function of the EN pin?

The Enable pin controls the operation of the regulator. Driving the pin high turns the regulator on, while pulling it low activates the shutdown mode.

How does the DQ suffix differ from the Q suffix?

The 'D' indicates that the device includes an internal auto-discharge resistor network to pull down the output voltage when disabled, whereas the 'Q' suffix denotes a non-discharge version.