Diodes Incorporated AP7583AQ-50D4-13

Overview

AP7583AQ-50D4-13 from Diodes Incorporated is an AEC-Q100 qualified 5.0V fixed-output ultra-low-dropout (ULDO) regulator delivering 300mA with 320mV dropout at full load, 3μA quiescent current, ±1.5% output accuracy, and integrated power-good (PG) monitoring-designed for always-on automotive subsystems including CAN transceivers and body control modules.

For engineers reviewing the AP7583AQ-50D4-13 datasheet, AP7583AQ-50D4-13 pinout, AP7583AQ-50D4-13 application, or AP7583AQ-50D4-13 equivalent, key selection criteria include input voltage range (3–42V), thermal shutdown threshold (+175°C), PG threshold hysteresis (2%), TO252-4 package thermal resistance (θJA = 27.2°C/W), and compatibility with low-ESR ceramic capacitors (4.7–100μF).

Technical Context

The AP7583AQ-50D4-13 integrates a precision 1.207V reference, error amplifier, current-limit circuit, thermal shutdown protection, and open-drain PG output with internal pull-up. Its architecture supports stable operation across -40°C to +125°C junction temperature with no minimum load requirement.

It features UVLO activation at 2.4V (±0.3V hysteresis), EN logic-high threshold ≥1.7V, and PG response time of 30μs from VOUT reaching 90% of regulation-enabling reliable supply sequencing and fault detection in multi-rail automotive systems.

Key Specifications

Pinout & Package

AP7583AQ-50D4-13 uses the TO252-4 (Type C) surface-mount package with exposed thermal pad (EP), optimized for high-power dissipation in automotive PCBs. The package has θJA = 27.2°C/W and θJC = 7.5°C/W, requiring direct thermal connection to large copper pour for reliable 300mA operation at elevated ambient temperatures.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar automotive LDO regulator applications.

Compared with AP7583Q-50D4-13, the AP7583AQ-50D4-13 adds essential PG monitoring for safety-critical sequencing but increases IQ by 0.5μA; versus TLV73350PDBVR, it trades extreme low-power capability for automotive-grade robustness, wide-input operation, and AEC-Q100 compliance.

Availability

AP7583AQ-50D4-13 is available at Aetrix Electronics and suitable for automotive body control modules, EV battery management systems, head unit display subsystems, and transmission control units requiring stable component supply across extended temperature and voltage ranges.

Supply support for AP7583AQ-50D4-13 includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Diodes Incorporated is a global semiconductor manufacturer specializing in discrete, analog, and mixed-signal solutions for automotive, industrial, and consumer markets, with IATF16949-certified manufacturing facilities.

The AP7583Q/AQ series belongs to Diodes' automotive-qualified power management portfolio, engineered specifically for battery-powered vehicle subsystems demanding ultra-low IQ, wide VIN range, and AEC-Q100 reliability.

FAQ

What is the maximum allowable input voltage for continuous operation?

The AP7583AQ-50D4-13 supports continuous operation up to 42V input, with absolute maximum rating of 45V. It is designed to withstand automotive load-dump transients per ISO 7637-2 Pulse 5a (40V, 100ms) without derating, provided proper input capacitance (≥10μF ceramic) and thermal layout are implemented.

How does the power-good (PG) pin behave during enable/disable transitions?

When EN is pulled low, the PG pin immediately goes low (active) within 3μs (tPGF). When EN is asserted high, PG remains low until VOUT reaches ≥90% of 5V, then transitions to high-impedance after 30μs (tPG). PG stays high-Z as long as VOUT remains ≥88% of regulation, providing clean sequencing without chatter.

Can this device operate stably with no output load?

Yes. The AP7583AQ-50D4-13 is unconditionally stable with zero load current. No minimum load is required-the internal compensation and reference circuitry maintain regulation and PG accuracy from 0mA to 300mA, making it ideal for always-on microcontroller standby rails.

What thermal design considerations apply to the TO252-4 package?

The TO252-4 (Type C) package has θJA = 27.2°C/W on JEDEC-standard board. To sustain 300mA at 42V input (PD ≈ 11.1W), ≥400mm² of 2oz copper connected to the EP pad is required. Thermal vias under the EP must connect to inner ground planes; insufficient copper area will trigger thermal shutdown above +85°C ambient.