Diodes Incorporated AP7361C-15Y5-13

Overview

AP7361C-15Y5-13 from Diodes Incorporated is a 1A fixed-output (1.5V) ultra-low dropout linear regulator in SOT89-5 package with enable input, ±1% output accuracy, 360mV dropout at 1A (for 3.3V version), and 60µA typical quiescent current-designed for power rail regulation in portable audio systems, set-top boxes, and LCD-TV mainboard logic supplies.

For engineers reviewing the AP7361C-15Y5-13 datasheet, AP7361C-15Y5-13 pinout, AP7361C-15Y5-13 application, or AP7361C-15Y5-13 equivalent, key selection considerations include verified 1.5V fixed output stability with 2.2–6.0V input range, EN pin logic thresholds (VIH = 1.0V, VIL = 0.3V), thermal shutdown at 150°C, and compatibility with ≥2.2µF MLCC output capacitors.

Technical Context

The AP7361C-15Y5-13 integrates a PMOS pass element, bandgap reference (0.8V), error amplifier, and fold-back current limit (400mA short-circuit clamp). Its fixed 1.5V output is internally trimmed-no external resistors required-and regulated via feedback to the internal reference.

Enable functionality is implemented as a logic-level gate control on the EN pin (active-high, 1.0V min VIH); it is not available in SOT223/TO252 packages but fully supported in SOT89-5. Thermal shutdown activates at ~150°C with 20°C hysteresis, enabling self-recovery under overload.

Key Specifications

Pinout & Package

SOT89-5 package: 5-pin thermally enhanced plastic package with exposed tab (pin 3 = GND, pin 5 = GND), footprint optimized for low thermal resistance (θJA = 150°C/W) on 1"x1" FR-4 board.

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 and XC6210B152MR-G, the AP7361C-15Y5-13 uniquely combines 1A capability, integrated EN control, thermal shutdown, and 540mV dropout in a cost-optimized SOT89-5 package-making it the only drop-in solution for mid-power 1.5V rails requiring robustness and simplicity.

Availability

AP7361C-15Y5-13 is available at Aetrix Electronics and suitable for LCD-TV power management, set-top box logic supplies, and portable audio DAC regulation requiring stable component supply, long-term lifecycle support, and RoHS-compliant sourcing.

Supply support for AP7361C-15Y5-13 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 compliance to RoHS 3 and halogen-free standards.

The AP7361C belongs to Diodes' high-performance LDO family targeting portable and consumer electronics, designed specifically to replace legacy regulators with lower dropout, higher PSRR, and integrated protection features in compact packages.

FAQ

What is the minimum input voltage required for stable 1.5V output at 1A load?

The AP7361C-15Y5-13 requires VIN ≥ 2.04V to maintain regulation at 1A (based on max 540mV dropout). Below this, output collapses; operation is guaranteed from 2.2V per datasheet spec. Input must also meet absolute max rating (≤6.5V) and recommended range (2.2–6.0V).

Can the EN pin be left floating, or must it be tied high/low?

The EN pin must never be left floating-it has no internal pull-up/down. For always-on operation, tie EN directly to IN. For controlled enable/disable, drive with a clean logic signal meeting VIH ≥ 1.0V and VIL ≤ 0.3V; leakage is ±0.1µA, so weak pull-ups are insufficient.

Is the SOT89-5 package thermally adequate for 1A continuous operation?

Yes, but with derating: θJA = 150°C/W on 1"x1" FR-4. At 1A with 3.3V input (1.8V drop), PD = 1.8W → ΔT = 270°C above ambient-exceeding safe limits. Practical use requires ≤500mA at 3.3V or heatsinking; for full 1A, use TO252 (θJA = 95°C/W) or SO-8EP (100°C/W).

Does the ±1% output accuracy include load, line, and temperature variation?

Yes-the ±1% specification covers total error across 100mA load, -40°C to +85°C ambient, and VIN = VOUT +1V to 5.5V. It excludes initial tolerance only; no additional drift terms apply. Accuracy degrades slightly outside these conditions (e.g., ±1.5% at 1.0–1.2V outputs per datasheet table).