Diodes Incorporated AP7365-28WG-7

Overview

AP7365-28WG-7 from Diodes Incorporated is a fixed-output 2.8V, 600mA low-dropout linear regulator with 35μA quiescent current, 300mV dropout at full load, and active-high enable control. It operates from 2V to 6V input, delivers ±2% output accuracy over –40°C to +85°C, and stabilizes with a single 1μF ceramic output capacitor. It is used in FPGA I/O power rails where fast transient response and ultra-low IQ are critical.

For engineers reviewing the AP7365-28WG-7 datasheet, AP7365-28WG-7 pinout, AP7365-28WG-7 application, or AP7365-28WG-7 equivalent, key selection criteria include dropout voltage at 600mA, PSRR at 1kHz, thermal shutdown threshold, EN logic thresholds, and SOT25 package thermal resistance for board-level thermal design.

Technical Context

The AP7365-28WG-7 integrates a PMOS pass element, bandgap reference, error amplifier, current-limit circuitry, and thermal shutdown comparator. Its fixed 2.8V output eliminates external feedback resistors, reducing BOM count and layout sensitivity.

It achieves fast 200μs start-up via optimized internal biasing and supports stable operation with low-ESR ceramic capacitors down to 1μF-enabling compact, high-efficiency point-of-load regulation in space-constrained portable systems.

Key Specifications

Pinout & Package

SOT25 (W package) - 5-pin surface-mount package with exposed thermal pad on bottom (not electrically connected); footprint optimized for thermal dissipation on 1oz copper FR-4 with minimum recommended pad layout per datasheet.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MCP1700-2802E/TO and TLS850F2TE/V33, the AP7365-28WG-7 uniquely balances 600mA delivery, 35μA IQ, 300mV dropout, and factory-set 2.8V accuracy in a thermally efficient SOT25 package - making it optimal for portable and industrial 2.8V point-of-load applications where all four parameters are simultaneously constrained.

Availability

AP7365-28WG-7 is available at Aetrix Electronics and suitable for FPGA power delivery, portable medical sensors, industrial PLC modules, and automotive infotainment subsystems requiring stable component supply with guaranteed long-term continuity.

Supply support for AP7365-28WG-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 manufacturing certified to IATF 16949 and product definitions aligned to AEC-Q standards.

The AP7365 belongs to Diodes' precision LDO portfolio designed for battery-powered and space-constrained applications demanding ultra-low IQ, fast transient response, and robust thermal protection - particularly in portable computing, industrial automation, and automotive subsystems.

FAQ

What is the maximum allowable input voltage for AP7365-28WG-7?

The absolute maximum input voltage is 6.5V, but the recommended operating range is 2V to 6V. Exceeding 6V risks permanent damage due to internal ESD structure breakdown, even briefly. For 3.7V Li-ion battery applications, the 6V upper limit provides safe headroom during charging peaks up to 4.2V plus ripple.

Can AP7365-28WG-7 operate without an output capacitor?

No - an output capacitor is mandatory for stability. The device requires ≥1μF ceramic capacitor with ESR >15mΩ on the OUT pin. Omitting it causes oscillation and unregulated output, potentially damaging downstream circuitry. The capacitor must be placed within 2mm of the OUT and GND pins per layout guidelines.

Is the EN pin 5V-tolerant when VIN = 3.3V?

Yes - the EN pin accepts logic-high signals up to VIN + 0.3V, so with VIN = 3.3V, it tolerates up to 3.6V. This allows direct interfacing with 3.3V GPIOs without level-shifting. However, VIH minimum is 1.4V, so 2.5V or 3.3V logic families drive it reliably.

How does thermal performance differ between SOT25 and U-DFN2020-6 packages?

The U-DFN2020-6 has lower θJA (132°C/W vs. 169°C/W for SOT25), enabling ~20% higher power dissipation before thermal shutdown at the same ambient temperature. However, SOT25 offers superior manufacturability in standard reflow processes and easier visual inspection - making it preferred for prototyping and medium-volume production.