AP7343DQ-09FDZW-7

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

The AP7343DQ-09FDZW-7 is an automotive-compliant low dropout regulator manufactured by Diodes Incorporated. It provides a fixed 0.9V output with a guaranteed maximum current of 300mA. The device operates within an input voltage range of 1.7V to 5.25V and features a typical ripple rejection of 75dB at 1kHz. It includes an enable pin, internal discharge circuitry, and thermal shutdown protection. The component is housed in a W-DFN2020-6 (SWP) Type A1 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 for specific change control requirements.
• Integrated N-channel auto-discharge resistor to rapidly remove charge from the output capacitor when disabled.
• High power supply ripple rejection ratio ensuring stable performance in electrically noisy environments.
• Low output noise characteristic suitable for sensitive RF and analog signal processing circuits.

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

• Infotainment power supplies
• Automotive RF supplies
• Camera modules
• Point-of-load regulation in ADAS systems
• Automotive wireless communications

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

Verify that the part number suffix FDZW corresponds to the W-DFN2020-6 (SWP) Type A1 package configuration. Confirm the DQ designation indicates the inclusion of the output discharge feature. Ensure the Q suffix confirms AEC-Q100 Grade 1 qualification. Check manufacturing origin against IATF 16949 certification requirements for automotive compliance.

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

Select this variant when a fixed 0.9V rail is required for automotive applications. The integrated discharge function distinguishes it from non-discharge versions. Verify PCB layout constraints match the W-DFN2020-6 footprint dimensions. Ensure input voltage remains above the minimum threshold while accounting for dropout voltage under full load conditions.

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

This component belongs to the AP7343Q family of low dropout regulators designed for automotive electronics. The series offers various fixed output voltages ranging from 0.9V to 3.6V. Different package options include SOT25 and W-DFN2020-6 variants. The family shares common electrical characteristics including high PSRR and low quiescent current profiles.

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

AP7343Q-09FDZW-7 serves as the non-discharge equivalent within the same package and voltage specification.

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

What is the function of the 'D' suffix in the part number?

The 'D' indicates that the regulator includes an internal N-channel auto-discharge resistor connected to the output, which pulls the output voltage down when the enable pin is low.

How does the EN pin operate?

The Enable pin must be driven high to turn on the regulator and pulled low to enter shutdown mode. It must not be left floating during operation.

Is this component qualified for automotive use?

Yes, the AP7343Q series is AEC-Q100 qualified, PPAP capable, and manufactured in IATF 16949 certified facilities.