AP7583AQ-33FDZW-7

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

The AP7583AQ-33FDZW-7 is a fixed-output 3.3V low-dropout regulator from Diodes Incorporated, designed for automotive applications. It delivers a maximum output current of 300mA with an input voltage range of 3V to 42V. The device features ultra-low quiescent current of 3µA and high accuracy of ±1.5%. It includes power-good indication, thermal shutdown, short-circuit protection, and under-voltage lockout. Packaged in W-DFN2020-6 (SWP) Type A1, it is AEC-Q100 qualified.

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

• Ultra-low quiescent current of 3µA at light loads
• Power-good indicator for supply monitoring and sequencing
• Wide input voltage range supporting 3V to 42V
• High output voltage accuracy of ±1.5%

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

• Powering microcontrollers (MCUs)
• Supplying CAN/LIN transceivers
• Automotive head units
• EV and HEV battery management systems

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

Verify the specific suffix FDZW corresponds to the W-DFN2020-6 package and the -7 indicates tape and reel packaging. Confirm the AQ designation ensures the inclusion of the Power-Good function compared to the standard Q series. Ensure compliance with AEC-Q100 requirements for automotive-grade reliability and IATF16949 manufacturing standards before finalizing procurement specifications.

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

Select this component when a stable 3.3V rail is required for always-on automotive electronics. The wide input range accommodates load dump conditions common in vehicle electrical systems. The integrated power-good signal simplifies system sequencing and fault detection. Consider the thermal resistance characteristics of the W-DFN2020-6 package for PCB layout optimization under high ambient temperatures.

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

This part belongs to the AP7583Q/AQ series of wide input-voltage LDO regulators. The series offers both fixed and adjustable output versions across multiple packages including MSOP-8EP, W-DFN2020-6, and TO252-4. The AQ variant specifically adds a power-good output pin not present in the standard Q series, enhancing diagnostic capabilities for critical automotive subsystems.

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

AP7583Q-33FDZW-7 serves as a functional substitute if the Power-Good feature is not utilized in the design.

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

What is the typical dropout voltage at full load?

The typical dropout voltage is 450mV at an output current of 300mA for the 3.3V version.

How does the Power-Good pin behave during operation?

The PG pin is open-drain with an internal pull-up resistor. It goes high-impedance when VOUT exceeds the threshold and drives low when VOUT drops below the threshold or the device is disabled.