Diodes Incorporated AP7361C-25SP-13

Overview

AP7361C-25SP-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), and 60µA typical quiescent current-enabling use in battery-powered audio/video devices and LCD-TVs where low standby loss and stable low-voltage rails are critical.

For engineers reviewing the AP7361C-25SP-13 datasheet, AP7361C-25SP-13 pinout, AP7361C-25SP-13 application, or AP7361C-25SP-13 equivalent, key selection factors include its SO-8EP package thermal performance (θJA = 100°C/W), EN pin logic thresholds (VIH ≥ 1.0V), fold-back short-circuit protection (400mA), and compatibility with ≥2.2µF MLCC output capacitors without external compensation.

Technical Context

The AP7361C-25SP-13 integrates a PMOS pass element, band-gap reference (0.8V), error amplifier, and thermal shutdown circuitry. Its fixed 2.5V output is internally set-no external resistors required-and it operates across 2.2V–6.0V input range with active-high enable control.

It features fold-back current limiting (trips to ~400mA under short-circuit), thermal shutdown at ~150°C with 20°C hysteresis, and maintains stability with ceramic, tantalum, or electrolytic output capacitors ≥2.2µF-eliminating need for ESR tuning in most designs.

Key Specifications

Pinout & Package

AP7361C-25SP-13 uses the SO-8EP (exposed pad) package: 5mm × 6mm body with thermal pad on underside for enhanced heat dissipation (θJA = 100°C/W). Pin 1 = IN, Pin 2 = GND, Pin 3 = OUT, Pin 4 = NC, Pin 5 = EN, Pin 6 = NC, Pin 7 = GND, Pin 8 = NC.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MCP1703T-2502E/MB and TLS850F2TE/V33, AP7361C-25SP-13 uniquely balances 1A output, SO-8EP thermal performance, and 60µA IQ-making it optimal for space-constrained, medium-power consumer electronics where cost, thermal headroom, and enable control are jointly critical.

Availability

AP7361C-25SP-13 is available at Aetrix Electronics and suitable for LCD-TV power management, set-top box AV rails, smart home appliance control, and industrial HMI display applications requiring stable component supply, consistent SO-8EP packaging, and full production lifecycle support.

Supply support for AP7361C-25SP-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 solutions, with design centers across Asia, Europe, and the US, and manufacturing in ISO/TS 16949-certified facilities.

The AP7361C belongs to Diodes' high-performance LDO family targeting portable and consumer electronics, emphasizing ultra-low dropout, low IQ, and robust protection for battery-powered and noise-sensitive systems.

FAQ

What is the minimum input voltage required for AP7361C-25SP-13 to maintain regulation at 1A?

The AP7361C-25SP-13 requires VIN ≥ VOUT + VDROPOUT. For 2.5V output at 1A, typical dropout is 200–250mV per datasheet Table 1, so minimum VIN is 2.7–2.75V. At 2.2V input, output drops below regulation; operation is guaranteed only from 2.2V input with reduced load current.

Can AP7361C-25SP-13 be used without an enable signal?

Yes. The EN pin has an internal 3.0MΩ pull-down resistor; tying EN directly to IN (or leaving it unconnected with proper PCB layout) keeps the regulator permanently enabled. This configuration is validated in the datasheet's "ON/OFF Input Operation" section and commonly used in fixed-rail applications.

Does the SO-8EP package require solder paste on the thermal pad?

Yes. The exposed thermal pad on the SO-8EP package must be soldered to a copper thermal plane using standard reflow profile and ≥50% solder coverage. Diodes' layout guidelines specify minimum pad size, thermal vias (≥4×0.3mm), and connection to inner-layer ground planes to achieve θJA = 100°C/W.

Is AP7361C-25SP-13 qualified for automotive applications?

No. AP7361C-25SP-13 is an industrial-grade part rated for –40°C to +85°C ambient. Diodes offers automotive variants (e.g., AP7361C-25SP-13Q) with AEC-Q100 qualification, PPAP documentation, and IATF16949 manufacturing-but this specific part number lacks Q-suffix and automotive certification.