AP7347DQ-12FDZW-7B

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

The AP7347DQ-12FDZW-7B is an automotive-compliant low dropout regulator manufactured by Diodes Incorporated. It provides a fixed output voltage of 1.2V with ±1% accuracy and supports up to 500mA output current. The device operates within a wide input voltage range of 1.7V to 5.5V and features a ripple rejection of 75dB at 1kHz. Output noise is specified at 60µVrms from 10Hz to 100kHz, while quiescent current is as low as 60µA. It utilizes the W-DFN2020-6 (SWP) package and includes integrated enable control, thermal shutdown, and short-circuit protection.

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

• Automotive-grade qualification including AEC-Q100 certification and PPAP capability for strict change control requirements.
• High power supply rejection ratio of 75dB combined with ultra-low output noise of 60µVrms for sensitive applications.
• Integrated enable pin with active discharge function to ensure known system startup states upon deactivation.
• Robust protection mechanisms featuring fold-back short-circuit current limiting and thermal shutdown.

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

• Infotainment power supplies
• Automotive RF supplies
• ADAS point-of-load regulation
• Automotive wireless communication systems

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

Verify that the specific suffix FDZW-7B corresponds to the W-DFN2020-6 wettable flanks package variant. Confirm compliance with automotive quality standards such as IATF 16949 manufacturing facilities. Ensure the ordering code matches the required 1.2V fixed output specification. Validate that the component meets RoHS and halogen-free environmental directives before final procurement integration.

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

Select this component when designing noise-sensitive automotive circuits requiring high precision and low standby power consumption. The W-DFN2020-6 package offers a compact footprint suitable for dense PCB layouts. Ensure input capacitors are placed close to the VIN and GND pins to maintain stability during load transients. Verify that the operating junction temperature remains within the -40°C to +125°C range for reliable performance.

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

This part belongs to the AP7347DQ series of low dropout regulators designed for automotive environments. The series is characterized by CMOS process technology, offering low on-resistance and high efficiency. It is engineered to support various fixed output voltages ranging from 1.0V to 5.0V across different package options.

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

AP7347DQ-12FDZW-7

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 output, while pulling it low activates shutdown mode with an internal active discharge feature.

How does the device handle short circuits?

The regulator incorporates short-circuit protection that clamps the output current to approximately 55mA when VOUT is shorted to ground, preventing damage from overheating.