AP7343DQ-25W5-7

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

The AP7343DQ-25W5-7 is an automotive-compliant low dropout regulator manufactured by Diodes Incorporated. It provides a fixed output voltage of 2.5V with a guaranteed maximum output current of 300mA. The device operates within an input voltage range of 1.7V to 5.25V and features a typical power supply rejection ratio of 75dB at 1kHz. It includes an enable pin for control and incorporates built-in auto-discharge functionality upon shutdown. The component is housed in a SOT-25-5 surface-mount 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 resistor for rapid output voltage decay
• High ripple rejection ratio ensuring stable performance in noisy environments
• Low quiescent current consumption optimized for battery-powered 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 'D' indicates the inclusion of the internal discharge feature, as standard variants lack this function. Confirm that the 'Q' designation aligns with required automotive compliance standards such as AEC-Q100 Grade 1. Ensure the SOT-25 package matches the target PCB footprint constraints. Validate that the fixed 2.5V output meets the system voltage requirements without external adjustment components.

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

Select this variant when automatic output discharge is required to meet safety or power-down specifications. The SOT-25 package offers a compact solution for dense layouts compared to larger regulators. Consider the thermal resistance characteristics if high load currents are sustained. Verify compatibility with the system's input voltage profile, particularly during transient dips below the minimum operating threshold.

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 electronics. The series emphasizes high precision and low noise to support sensitive analog and digital circuits. Manufacturing occurs in IATF 16949 certified facilities to ensure consistent quality. The family includes various output voltages and packaging options to accommodate diverse design needs.

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

AP7343Q-25W5-7 (Identical electrical performance but lacks the integrated discharge feature)

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. This feature actively pulls the output voltage down when the enable pin is deasserted.

How does the enable pin operate?

Driving the EN pin high turns the regulator on, while pulling it low activates the shutdown mode. If the discharge feature is present, the output voltage will decay rapidly after being disabled.

Is this component suitable for harsh automotive environments?

Yes, the AP7343Q series is AEC-Q100 qualified and rated for an extended temperature range of -40°C to +125°C, making it suitable for demanding automotive applications.