AP7347DQ-33W5-7

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

The AP7347DQ-33W5-7 is a CMOS-based low dropout regulator with an output voltage of 3.3V and a guaranteed output current of 500mA. It operates within an input voltage range of 1.7V to 5.5V and features high ripple rejection of 75dB at 1kHz. The device includes an enable pin, short-circuit protection, and thermal shutdown. It is packaged in SOT25 (Type A1) and meets automotive standards including AEC-Q100 qualification.

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

• Automotive compliant with AEC-Q100 qualification and PPAP capability for specific change control requirements.
• High power supply ripple rejection of 75dB at 1kHz combined with low output noise of 60µVrms from 10Hz to 100kHz.
• Integrated enable input allows for precise on/off control, supporting shutdown mode when driven low.
• Built-in short-circuit protection clamps output current during faults, while thermal shutdown prevents overheating.

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

• Infotainment power supplies
• Automotive RF supplies
• Cameras
• Automotive POL in ADAS
• Automotive wireless communication systems

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

Verify the component matches the exact Diodes Incorporated part number AP7347DQ-33W5-7. Confirm the package type is SOT25 (Type A1) as indicated by the W5 suffix. Ensure the ordering suffix corresponds to tape and reel packaging. Check that the device carries the Q suffix denoting automotive compliance and AEC-Q100 qualification status before finalizing procurement.

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

Select this regulator for applications requiring high accuracy and low noise in automotive environments. The fixed 3.3V output suits digital logic and sensor power rails. Consider the 500mA current capacity and low dropout characteristics for efficient power management. Verify PCB layout constraints align with the SOT25 footprint and thermal dissipation requirements for the intended operating temperature range.

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

This component belongs to the AP7347DQ series of low dropout regulators designed for automotive electronics. It utilizes a CMOS process to achieve low quiescent current and high performance. The series offers various fixed output voltages and is available in compact packages suitable for dense PCB layouts. It is manufactured in IATF 16949 certified facilities to meet automotive quality standards.

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

Consult the official datasheet for direct substitutes within the AP7347DQ family or equivalent automotive LDOs. Verify pin compatibility and electrical specifications such as output current and dropout voltage. Ensure any replacement maintains AEC-Q100 qualification if required for the application.

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

What is the function of the EN pin?

The EN pin controls the regulator's operation. Driving it high enables the regulator, while pulling it low puts the device into shutdown mode. It must not be left floating.

Is the AP7347DQ-33W5-7 qualified for automotive use?

Yes, the AP7347DQ series is AEC-Q100 qualified, PPAP capable, and manufactured in IATF 16949 certified facilities, making it suitable for automotive applications.

How does the device handle short circuits?

The regulator includes short-circuit protection that triggers when VOUT is shorted to GND, clamping the output current to approximately 55mA to protect the device from damage.