Diodes Incorporated AP7361C-25SPR-13

Overview

AP7361C-25SPR-13 from Diodes Incorporated is a 1A fixed-output (2.5V) ultra-low dropout linear regulator with enable, designed for power rail regulation in space-constrained systems. It delivers ±1% output accuracy, 360mV dropout at 1A (for 3.3V variant; 2.5V dropout is 200–250mV), 60µA quiescent current, and integrates thermal shutdown, fold-back short-circuit protection (400mA), and current limit (1.5A). It is used in LCD-TV power supplies, set-top-box core logic rails, and home appliance control modules.

For engineers reviewing the AP7361C-25SPR-13 datasheet, AP7361C-25SPR-13 pinout, AP7361C-25SPR-13 application, or AP7361C-25SPR-13 equivalent, key selection criteria include dropout voltage at 2.5V output, SO-8EP package thermal resistance (100°C/W), EN pin logic thresholds (VIH = 1.0V min), stability with ≥2.2µF MLCC output capacitors, and compatibility with no-load operation.

Technical Context

The AP7361C-25SPR-13 implements a PMOS pass transistor architecture enabling ultra-low dropout performance and high PSRR (75dB @ 1kHz). Its internal 0.8V bandgap reference feeds an error amplifier that regulates output via feedback from the ADJ/NC pin - unused in fixed 2.5V configuration but retained for pin compatibility across variants.

Enable control is implemented as a logic-high active input (VIH ≥ 1.0V) with 3.0MΩ internal pull-down; thermal shutdown activates at ~150°C with 20°C hysteresis, and fold-back current limiting reduces short-circuit current to ~400mA while maintaining safe junction temperature under fault conditions.

Key Specifications

Pinout & Package

AP7361C-25SPR-13 is packaged in SO-8EP (exposed pad), a thermally enhanced 8-pin surface-mount package with GND-connected thermal pad for improved heat dissipation (θJA = 100°C/W).

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/V33, AP7361C-25SPR-13 uniquely balances 1A capability, ultra-low dropout (200–250mV), and 60µA IQ in a thermally robust SO-8EP package - making it optimal for high-current, low-noise consumer electronics where both performance and thermal headroom matter.

Availability

AP7361C-25SPR-13 is available at Aetrix Electronics and suitable for LCD-TV power management, set-top box core logic, and smart home appliance control requiring stable component supply, long-term lifecycle support, and RoHS-compliant green packaging.

Supply support for AP7361C-25SPR-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 devices, with manufacturing certified to IATF 16949:2016 and environmental standards including RoHS 3 and halogen-free "Green" compliance.

The AP7361C belongs to Diodes' high-performance LDO regulator product line, engineered for low-noise, low-dropout power delivery in consumer, computing, and industrial applications where efficiency, reliability, and compact footprint are critical.

FAQ

What is the maximum input voltage for AP7361C-25SPR-13?

The absolute maximum input voltage is 6.5V, but the recommended operating range is 2.2V to 6.0V. Exceeding 6.0V risks violating the device's safe operating area, especially under high load or elevated ambient temperatures, and may trigger thermal shutdown prematurely.

Can AP7361C-25SPR-13 operate without an output capacitor?

No - a minimum 2.2µF ceramic capacitor is required between OUT and GND for stability. Omitting it causes oscillation and unregulated output. The device is optimized for MLCCs but also stable with solid tantalum or aluminum electrolytic capacitors ≥2.2µF and low ESR.

Is the EN pin mandatory for operation?

No - the EN pin is optional. If unused, tie it directly to IN to maintain permanent enable. Leaving EN floating is unsafe due to noise susceptibility; the internal 3.0MΩ pull-down ensures default OFF but does not guarantee noise-immune operation in electrically noisy environments.

How does thermal performance differ between SO-8EP and other packages?

SO-8EP has θJA = 100°C/W (with recommended thermal pad layout), significantly better than SOT89-5 (150°C/W) or SOT223 (110°C/W). This allows 1A operation at higher ambient temperatures or with less PCB copper area, reducing risk of thermal shutdown in enclosed consumer enclosures.