Diodes Incorporated AP7366-25W5-7

Overview

AP7366-25W5-7 from Diodes Incorporated is a fixed-output 2.5V, 600mA low-dropout linear regulator in SOT25 package, featuring 60μA quiescent current, 300mV dropout at full load, 75dB PSRR at 1kHz, and integrated enable control, thermal shutdown, and current-limit protection-designed for FPGA I/O power, notebook standby rails, and battery-powered sensor nodes.

For engineers reviewing the AP7366-25W5-7 datasheet, AP7366-25W5-7 pinout, AP7366-25W5-7 application, or AP7366-25W5-7 equivalent, key selection criteria include dropout voltage at 600mA, EN logic thresholds (VIH = 1.0V, VIL = 0.3V), output accuracy (±1% for 2.5V), thermal resistance (169°C/W), and compatibility with 1μF ceramic output capacitors.

Technical Context

The AP7366-25W5-7 implements a PMOS pass transistor architecture enabling ultra-low quiescent current and fast transient response. Its internal 0.8V bandgap reference feeds an error amplifier that regulates output via feedback to the gate driver, with no external components required for the fixed 2.5V version.

Enable functionality uses active-high logic with built-in 3MΩ pulldown resistor and ±0.1μA leakage, while protection circuitry includes foldback current limiting (typ. 250mA short-circuit clamp) and thermal shutdown at +150°C with +20°C hysteresis-ensuring robust operation under fault conditions without external supervision.

Key Specifications

Pinout & Package

SOT25 package (3.0mm × 2.8mm × 1.3mm) with exposed pad not electrically connected; requires standard FR-4 PCB layout with minimum 1oz copper thermal pad area per Diodes' recommended footprint (C1 = 2.40mm, C2 = 0.95mm).

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar low-dropout linear regulator applications.

Compared with MCP1703T-2502E/MB and XC6210B252MR-G, the AP7366-25W5-7 uniquely balances 600mA delivery, 60μA I_Q, EN control, and 300mV dropout-making it the sole fit for dynamic, high-current, battery-sensitive systems requiring both performance and efficiency.

Availability

AP7366-25W5-7 is available at Aetrix Electronics and suitable for FPGA power sequencing, notebook standby subsystems, and wireless sensor node designs requiring stable component supply across extended production lifecycles.

Supply support for AP7366-25W5-7 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 company specializing in discrete, analog, and mixed-signal ICs, with design centers in Asia, Europe, and the U.S., serving industrial, computing, and consumer markets.

The AP7366 belongs to Diodes' high-efficiency LDO portfolio targeting portable and battery-constrained applications, emphasizing ultra-low I_Q, fast transient response, and robust protection for reliable operation in unattended edge devices.

FAQ

What is the minimum input voltage required for stable 2.5V output at 600mA?

The AP7366-25W5-7 requires VIN ≥ 2.8V to maintain regulation at 600mA due to its 300mV dropout voltage. Below this, output collapses linearly; operation down to 2.2V is supported only at reduced load currents per the dropout vs. IOUT curves in DS41529 Rev. 4-3.

Can the EN pin be left unconnected, or must it be tied high?

The EN pin must not be left floating: it has an internal 3MΩ pulldown resistor, so leaving it open results in guaranteed disable. For always-on operation, tie EN directly to IN. For controlled enable, drive with a GPIO meeting VIH ≥ 1.0V and VIL ≤ 0.3V specifications.

Is a minimum load required for stability with the AP7366-25W5-7?

No minimum load is required. The device remains stable and regulated from zero load up to 600mA, as confirmed in the datasheet's "No Load Stability" section. This eliminates need for dummy loads in low-power sleep modes.

Does the SOT25 package of AP7366-25W5-7 include a thermal pad, and is it electrically connected?

The SOT25 package has an exposed thermal pad, but it is not electrically connected to any internal node-it serves only for heat dissipation. Per Diodes' recommended layout, it must be soldered to a copper thermal plane using the specified footprint (C1 = 2.40mm, C2 = 0.95mm) to achieve the rated 169°C/W θJA.