Diodes Incorporated AP7361C-25FGE-7

Overview

AP7361C-25FGE-7 from Diodes Incorporated is a 1A fixed-output (2.5V) ultra-low dropout linear regulator in U-DFN3030-8 (Type E) package, featuring 360mV dropout at 1A, ±1% output accuracy, and 60µA quiescent current. It integrates enable control, thermal shutdown, and fold-back short-circuit protection, and is optimized for power rail regulation in space-constrained portable electronics.

For engineers reviewing the AP7361C-25FGE-7 datasheet, AP7361C-25FGE-7 pinout, AP7361C-25FGE-7 application, or AP7361C-25FGE-7 equivalent, key selection criteria include dropout voltage at full load, EN logic thresholds, PSRR at 1kHz, thermal resistance (70°C/W), and compatibility with 2.2µF MLCC output capacitors.

Technical Context

The AP7361C-25FGE-7 uses a PMOS pass element enabling ultra-low dropout operation and operates across 2.2V–6.0V input range while maintaining stable 2.5V output. Its internal 0.8V bandgap reference and error amplifier deliver ±1% output accuracy over -40°C to +85°C ambient temperature.

Enable functionality is implemented via active-high EN pin with 1.0V VIH threshold and 0.3V VIL; internal pull-down resistor (3.0MΩ) ensures default-off behavior. Protection circuitry includes 1.5A current limit, 400mA fold-back short-circuit clamp, and thermal shutdown at 150°C with 20°C hysteresis.

Key Specifications

Pinout & Package

AP7361C-25FGE-7 is housed in a 3.0mm × 3.0mm × 0.55mm U-DFN3030-8 (Type E) package with wettable flank leads and exposed thermal pad (Pin 4). The package supports reflow soldering per J-STD-020 Level 1 and delivers 70°C/W junction-to-ambient thermal resistance on standard 2"x2" FR-4 PCB with thermal vias.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MCP1703T-2502E/MB and TLS850F2TE/V1, AP7361C-25FGE-7 uniquely balances 1A capability, 360mV dropout, EN control, and compact U-DFN3030-8 packaging - making it optimal for high-density portable and industrial embedded designs where performance, size, and feature integration are prioritized.

Availability

AP7361C-25FGE-7 is available at Aetrix Electronics and suitable for portable audio devices, IoT sensor nodes, industrial HMI displays, and set-top box USB peripherals requiring stable component supply, consistent parametric performance, and long-term production continuity.

Supply support for AP7361C-25FGE-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 solutions, with manufacturing certified to IATF 16949 and ISO 9001 standards.

The AP7361C belongs to Diodes' high-performance LDO portfolio designed for low-noise, low-dropout power management in portable, industrial, and consumer electronics where efficiency, reliability, and small form factor are essential.

FAQ

What is the minimum input voltage required for AP7361C-25FGE-7 to regulate 2.5V at 1A?

The minimum input voltage is determined by dropout: 2.5V + 0.36V = 2.86V. At 1A load and +25°C, the typical dropout is 360mV; derating for temperature and tolerance yields 2.86V as practical minimum. Below this, output voltage sags nonlinearly and regulation fails.

Can AP7361C-25FGE-7 operate without an output capacitor?

No. The device requires ≥2.2µF ceramic output capacitance for stability, as confirmed in the datasheet's Application Information section. Omitting COUT causes oscillation and potential damage due to phase margin loss; MLCC, tantalum, or polymer capacitors ≥2.2µF are all supported.

Is the EN pin internally pulled down, and what is its leakage current?

Yes - the EN pin has an internal 3.0MΩ pull-down resistor, ensuring default-off state during power-up. Input leakage is ±0.1µA at VIN = 5.5V and VEN = 0V, verified in Electrical Characteristics Table (IEN parameter), enabling reliable interfacing with weak GPIO drivers.

How does thermal shutdown behave under sustained overload?

When junction temperature reaches ~150°C, the regulator disables output; it re-enables automatically once temperature falls to ~130°C due to 20°C hysteresis. Under continuous overload, this causes controlled on/off cycling - limiting average power dissipation and preventing permanent damage.