Diodes Incorporated AP7365-25ERG-13

Overview

AP7365-25ERG-13 from Diodes Incorporated is a 600mA fixed-output (2.5V) low-dropout linear regulator in SOT223-ER package, featuring 35μA quiescent current, 300mV dropout at full load, and integrated enable control, thermal shutdown, and current limiting-designed for FPGA I/O power, notebook standby rails, and battery-powered DSP subsystems.

For engineers reviewing the AP7365-25ERG-13 datasheet, AP7365-25ERG-13 pinout, AP7365-25ERG-13 application, or AP7365-25ERG-13 equivalent, key selection criteria include dropout voltage at 600mA, PSRR at 1kHz, start-up time under 200μs, stability with 1μF ceramic output capacitor, and thermal shutdown threshold at +145°C.

Technical Context

The AP7365-25ERG-13 implements a PMOS pass transistor architecture enabling low dropout (300mV @ 600mA, VOUT ≥ 2.5V) and ultra-low quiescent current (35μA typ). Its internal 0.8V bandgap reference and error amplifier support ±2% output accuracy across –40°C to +85°C ambient.

It integrates active high EN control, fast transient response (load step from 10mA to 600mA with <200mV undershoot), and protection circuitry including thermal shutdown (145°C trip, 15°C hysteresis) and short-circuit current limiting (240mA typical).

Key Specifications

Pinout & Package

SOT223-ER package with exposed thermal pad (pin 3 = GND, pin 2 = OUT, pin 1 = IN); thermally enhanced for 142°C/W junction-to-ambient resistance on standard FR-4 board.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar fixed-output LDO applications.

Compared with MCP1700-2502E/TO and TLS850F2TE/V1, the AP7365-25ERG-13 uniquely balances 600mA capability, 35μA IQ, SOT223 thermal performance, and industrial temperature range - making it optimal for cost-sensitive, medium-power embedded systems without automotive certification requirements.

Availability

AP7365-25ERG-13 is available at Aetrix Electronics and suitable for FPGA I/O power, notebook standby rails, and industrial sensor node designs requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.

Supply support for AP7365-25ERG-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 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' high-efficiency LDO portfolio targeting portable and embedded power management, emphasizing low IQ, fast transient response, and robust protection for battery-constrained and thermally demanding applications.

FAQ

Is the EN pin available on the AP7365-25ERG-13 in SOT223-ER package?

No. Per the AP7365 datasheet Pin Descriptions table and SOT223 (ER Package) pinout diagram, the SOT223-ER variant has only three functional pins: IN (1), OUT (2), and GND (3/tab). Pin 4 is marked NC (No Connection), and EN functionality is omitted in this package variant. Enable control is only available in SOT25 and U-DFN2020-6 packages.

What is the minimum recommended output capacitor for stable operation?

A 1μF ceramic capacitor with ESR >15mΩ is the minimum required for stability across all operating conditions. The datasheet confirms stability with this value and notes that increasing capacitance improves load and line transient response. Tantalum or electrolytic capacitors are not required, and smaller values (e.g., 0.47μF) risk instability per the C_OUT-ESR vs. load current plot on page 8.

Can the AP7365-25ERG-13 operate from a 2.0V input?

No. The absolute maximum rating specifies VIN ≤ 6.5V, but the Recommended Operating Conditions require VIN ≥ 2.0V *and* VIN ≥ VOUT + dropout. With VOUT = 2.5V and dropout ≥300mV, minimum valid VIN is 2.8V. At 2.0V input, the device cannot regulate - output collapses to ≈VIN – dropout ≈ 1.7V, outside specification.

Does the AP7365-25ERG-13 require a minimum load current to maintain regulation?

No. The datasheet explicitly states "No Load Stability" and confirms the device remains stable and regulated with zero load current. This is enabled by the internal compensation design and absence of minimum ESR requirements beyond the 1μF ceramic capacitor. No dummy load resistor is needed in standby or sleep modes.