Diodes Incorporated AP7361C-15SPR-13

Overview

AP7361C-15SPR-13 from Diodes Incorporated is a 1A fixed-output (1.5V) 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; 1.5V variant dropout is 600mV typ. at 300mA), and 60µA quiescent current-enabling efficient operation in battery-powered audio/video devices and LCD-TVs.

For engineers reviewing the AP7361C-15SPR-13 datasheet, AP7361C-15SPR-13 pinout, AP7361C-15SPR-13 application, or AP7361C-15SPR-13 equivalent, key selection criteria include its SO-8EPR package thermal performance (θ_JA = 100°C/W), EN pin logic thresholds (V_IH = 1.0V min), and stability with ≥2.2µF MLCC output capacitors-critical for load transient response in set-top-box power domains.

Technical Context

The AP7361C-15SPR-13 integrates a PMOS pass element, band-gap reference, and error amplifier to regulate 1.5V output from 2.2–6.0V input. Its fold-back short-circuit protection limits output to 400mA during fault, while thermal shutdown activates at 150°C with 20°C hysteresis.

It operates in fixed-output mode (no ADJ pin connection required), supports fast start-up (150µs typ.), and maintains regulation down to zero load. The SO-8EPR package features exposed thermal pad and matte tin-plated leads compliant with MIL-STD-202 Method 208.

Key Specifications

Pinout & Package

AP7361C-15SPR-13 uses the SO-8EPR package: 8-pin thermally enhanced small-outline package with exposed pad (EP) for improved heat dissipation. Pin 1 = IN, Pin 2 = GND, Pin 3 = OUT, Pin 4 = NC, Pin 5 = ADJ/NC (not used in fixed 1.5V version), Pin 6 = EN, Pin 7 = NC, Pin 8 = GND. The exposed pad must be soldered to PCB ground plane for thermal performance.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MCP1703T-1502E/MB and XC6210B152MR-G, AP7361C-15SPR-13 uniquely combines 1A capability, SO-8EPR thermal performance, and integrated EN logic in a single component-reducing BOM count and PCB area in space-constrained 1.5V rail designs.

Availability

AP7361C-15SPR-13 is available at Aetrix Electronics and suitable for LCD-TV power management, set-top-box subsystem regulation, and smart home appliance MCU core supply requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.

Supply support for AP7361C-15SPR-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 manufacturer specializing in discrete, analog, and mixed-signal solutions for power management, signal integrity, and connectivity applications.

The AP7361C belongs to Diodes' high-performance LDO family targeting portable and consumer electronics, engineered for ultra-low dropout, low IQ, and robust fault protection in thermally demanding environments.

FAQ

What is the minimum input voltage required for AP7361C-15SPR-13 to maintain regulation at full 1A load?

The device requires VIN ≥ VOUT + VDROPOUT. For 1.5V output, typical dropout is 600mV at 300mA and increases with load; at 1A, dropout reaches ~710mV (per datasheet Table 1). Thus, minimum VIN = 1.5V + 0.71V = 2.21V - aligning with the specified 2.2V absolute minimum input rating.

Can AP7361C-15SPR-13 be used with ceramic output capacitors smaller than 2.2µF?

No. The datasheet explicitly states stability requires ≥2.2µF ceramic output capacitance. Using smaller values risks oscillation or poor transient response, as verified in Application Information section (page 11). Lower-ESR capacitors do not relax this minimum value requirement.

Is the EN pin internally pulled down on AP7361C-15SPR-13?

Yes. The datasheet specifies R_ENPD = 3.0MΩ (typ.) - an internal pull-down resistor ensures the regulator remains disabled if EN is left floating. This prevents unintended power-up during board insertion or handling, enhancing system reliability.

How does thermal performance differ between SO-8EPR and SO-8EP packages for AP7361C-15SPR-13?

SO-8EPR (used in AP7361C-15SPR-13) features an exposed thermal pad connected to GND, achieving θ_JA = 100°C/W. Standard SO-8EP lacks this pad and has identical θ_JA per datasheet - both share the same thermal resistance rating because the "R" suffix denotes revised marking, not structural change in thermal design.