Diodes Incorporated AP7375Q-30W5-7

Overview

AP7375Q-30W5-7 from Diodes Incorporated is an AEC-Q100 qualified automotive-grade 3.0V fixed-output ultra-low-dropout linear regulator (ULDO) with 45V max input voltage, 300mA output current capability, and 2.1µA typical quiescent current. It features enable control up to 45V, ±2% output accuracy, and integrated short-circuit/thermal shutdown protection-designed for power management in harsh automotive environments such as body control modules and EV battery monitoring circuits.

For engineers reviewing the AP7375Q-30W5-7 datasheet, AP7375Q-30W5-7 pinout, AP7375Q-30W5-7 application, or AP7375Q-30W5-7 equivalent, this part delivers high PSRR (85dB @ 1kHz), fast transient response without overshoot during startup or short-circuit recovery, and robust thermal performance in the SOT25 package with exposed pad for enhanced dissipation.

Technical Context

The AP7375Q-30W5-7 implements a PMOS pass transistor architecture enabling ultra-low dropout (35mV @ 10mA, 350mV @ 100mA) and wide VIN range (3V–45V). Its EN pin accepts up to 45V logic-level input, eliminating external level-shifting circuitry in high-voltage automotive systems.

It integrates precision bandgap reference, error amplifier, current-limit sensing, and thermal foldback circuitry. The device maintains stable regulation under rapid load transients (10mA→300mA in 200µs) and line transients (4.3V→12V), with no output overshoot during power-on or short-circuit recovery.

Key Specifications

Pinout & Package

SOT25 (Package Code: W5) is a 5-pin surface-mount package with exposed thermal pad (EP), optimized for space-constrained automotive PCBs. Pin 1 is VOUT, Pin 2 is VIN, Pin 3 is GND, Pin 4 is GND, Pin 5 is EN. The EP must be connected to GND via large copper area for thermal dissipation.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TLV73330PDBVR and MAX1725EUT33+T, the AP7375Q-30W5-7 uniquely combines 45V input tolerance, AEC-Q100 qualification, and sub-µA quiescent current-making it the only viable option for direct-battery-supplied, always-on automotive nodes requiring long-term reliability and low-system-power operation.

Availability

AP7375Q-30W5-7 is available at Aetrix Electronics and suitable for automotive body control modules, EV battery sensor interfaces, and transmission control units requiring stable component supply across extended temperature ranges and stringent quality certifications.

Supply support for AP7375Q-30W5-7 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 devices, with design centers in Asia, Europe, and the U.S., and manufacturing certified to IATF 16949.

The AP7375Q series belongs to Diodes' automotive-qualified power management portfolio, engineered specifically for high-reliability, wide-input-voltage LDO applications in safety-critical vehicle subsystems.

FAQ

What is the minimum input voltage required for regulation at 3.0V output?

The AP7375Q-30W5-7 requires VIN ≥ 3.0V to operate, but stable regulation begins when VIN exceeds VOUT + VDROP(MAX). At 300mA load, dropout is 1.4V max, so minimum functional VIN is 4.4V. Below that, output drops linearly per the dropout curve in DS44818 Rev. 7-2 page 4.

Can the EN pin be left floating in the application?

No. The EN pin has no internal pull-up or pull-down; floating EN causes undefined output state and potential shoot-through risk. Diodes recommends connecting EN to GND via 100kΩ resistor for default disable, or to a controlled logic signal. Absolute max EN voltage is 55V, but operating range is 0–45V.

Is the exposed pad (EP) electrically connected to GND internally?

No. The EP is thermally conductive only and not bonded to any internal die node. It must be soldered to a GND copper pour for heat dissipation, but cannot serve as the sole GND return path. Pins 3 and 4 provide dedicated GND connections; EP is strictly for thermal enhancement.

Does AP7375Q-30W5-7 require an input capacitor?

Yes. A minimum 1µF X7R/X5R ceramic capacitor is required between VIN and GND, placed within 2mm of the pins. This stabilizes input impedance, suppresses high-frequency noise, and prevents oscillation during fast load transients. Larger values (e.g., 4.7µF) further improve line rejection without compromising stability.