Diodes Incorporated AP7361C-15ER-13

Overview

AP7361C-15ER-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 portable and battery-powered systems. It delivers ±1% output accuracy, 360mV dropout at 1A (for 3.3V variant; 1.5V dropout is 600mV typ), 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 and set-top-box core logic rails.

For engineers reviewing the AP7361C-15ER-13 datasheet, AP7361C-15ER-13 pinout, AP7361C-15ER-13 application, or AP7361C-15ER-13 equivalent, key selection criteria include dropout voltage at 1.5V output, EN pin logic thresholds (VIH = 1.0V min), thermal resistance of SO-8EPR package (θJA = 100°C/W), and compatibility with ≥2.2µF MLCC output capacitors.

Technical Context

The AP7361C-15ER-13 implements a PMOS pass transistor architecture enabling ultra-low dropout operation and stable regulation down to 1.5V output. Its internal 0.8V bandgap reference and error amplifier support precise feedback via external resistor divider in adjustable mode; in fixed 1.5V mode, the ADJ/NC pin is internally connected and unused.

Enable functionality is implemented as a logic-level input (VIH ≥ 1.0V, VIL ≤ 0.3V) driving an internal gate driver; EN is active-high and not available in SOT223/TO252 packages - but supported in SO-8EPR (Pin 4, 6, 7). Thermal shutdown activates at TJ ≈ 150°C with 20°C hysteresis, and fold-back current limiting reduces short-circuit current to ~400mA.

Key Specifications

Pinout & Package

AP7361C-15ER-13 is packaged in SO-8EPR (exposed pad, RoHS-compliant NiPdAu finish), optimized for thermal performance (θJA = 100°C/W) on 2-layer FR-4 with thermal vias. Pin assignments are validated per Diodes DS37274 Rev. 5–2.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MCP1703T-1502E/MB, AP7361C-15ER-13 delivers 6.7× higher output current and integrated enable, while XC6210B152MR-G offers superior dropout and IQ but sacrifices controllability - making AP7361C-15ER-13 optimal for 1A, enable-driven, thermally constrained applications.

Availability

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

Supply support for AP7361C-15ER-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 design centers across Asia, Europe, and the US, and manufacturing in IATF16949-certified facilities.

AP7361C belongs to Diodes' high-performance LDO portfolio targeting portable, consumer, and industrial power management - engineered for low dropout, low IQ, and robust fault protection in thermally demanding environments.

FAQ

What is the maximum allowable input voltage for AP7361C-15ER-13?

The absolute maximum input voltage is 6.5V, but recommended operating range is 2.2V to 6.0V. Exceeding 6.5V risks permanent damage per Absolute Maximum Ratings. For reliable 1.5V output, VIN must remain ≥2.1V to avoid dropout - verified by 600mV dropout spec at 300mA and 1.5V output.

Does AP7361C-15ER-13 require an external resistor divider for 1.5V output?

No. The "-15" suffix denotes factory-trimmed fixed 1.5V output; the ADJ/NC pin is internally terminated and must remain unconnected. External resistors are only required for adjustable versions (e.g., AP7361C-ADJ); using them with -15ER-13 would disrupt regulation.

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

No. Stability is guaranteed only with ≥2.2µF ceramic output capacitance (X5R/X7R), as confirmed in Application Information section. Using smaller values risks oscillation or poor transient response; 4.7µF is recommended for optimal line/load regulation per typical application circuits.

Is thermal pad soldering required for SO-8EPR package reliability?

Yes. The exposed thermal pad in SO-8EPR (Pin 0) must be soldered to a PCB copper pour with ≥4 thermal vias to internal ground plane. Without this, θJA degrades from 100°C/W to >150°C/W, risking thermal shutdown under 1A load at +70°C ambient per datasheet thermal characterization notes.