AP7343Q-185FDZW-7

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

The AP7343Q-185FDZW-7 is an automotive-compliant low dropout regulator manufactured by Diodes Incorporated. It provides a fixed output voltage of 1.85V with a guaranteed maximum output 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. It features high power supply rejection ratio (PSRR) of 75dB at 1kHz and low output noise of 60µVrms. The component utilizes W-DFN2020-6 (SWP) Type A1 packaging.

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

• Automotive compliant design qualified to AEC-Q100 standards for use in specific change control applications
• Integrated enable pin allows for precise power management and shutdown control
• Includes internal protection mechanisms such as thermal shutdown and foldback short-circuit current limiting

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

• Infotainment power supplies
• Automotive RF supplies
• Camera systems
• Automotive POL in ADAS
• Automotive wireless communications

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

Verify the part number suffix FDZW corresponds to the W-DFN2020-6 (SWP) Type A1 package configuration. Confirm that the Q suffix indicates automotive compliance and AEC-Q100 qualification. Ensure the ordering code matches the required 1.85V fixed output voltage variant. Check datasheet revision DS41595 Rev. 5 for any updates to electrical characteristics or marking information before finalizing procurement specifications.

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

Select this component when designing noise-sensitive automotive circuits requiring a stable 1.85V rail. The wide input voltage range accommodates varying battery conditions. The small footprint facilitates dense PCB layouts. Verify that the load current requirements do not exceed the 300mA guarantee. Consider the thermal resistance characteristics of the W-DFN2020-6 package for heat dissipation planning under maximum load conditions.

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

This device belongs to the AP7343Q series of low dropout regulators designed for automotive environments. It shares core architectural features with other variants in the family, differing primarily in output voltage and package type. The series emphasizes low quiescent current and high PSRR to support sensitive analog and digital loads in vehicles.

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

AP7343DQ-185FDZW-7 serves as a functional substitute with identical electrical performance but includes an auto-discharge feature on the output.