Diodes Incorporated AP7361EA-18Y5-13

Overview

AP7361EA-18Y5-13 from Diodes Incorporated is a 1A fixed-output (1.8V), ultra-low dropout linear regulator in SOT89-5 package with enable control, ±1% output accuracy, 360mV dropout at 1A (3.3V variant), and 68µA typical quiescent current-designed for stable power delivery in battery-powered audio/video equipment and LCD monitors.

For engineers reviewing the AP7361EA-18Y5-13 datasheet, AP7361EA-18Y5-13 pinout, AP7361EA-18Y5-13 application, or AP7361EA-18Y5-13 equivalent, this part supports precise low-noise 1.8V rail generation with thermal shutdown, foldback short-circuit protection, and compatibility with MLCC output capacitors ≥2.2µF in space-constrained consumer electronics designs.

Technical Context

The AP7361EA-18Y5-13 integrates a PMOS pass transistor, bandgap reference, error amplifier, and enable logic to deliver regulated 1.8V output across 2.2V–6.0V input range. Its 75dB PSRR at 1kHz suppresses supply noise critical for analog-sensitive circuits.

Thermal shutdown activates at ~150°C with 20°C hysteresis, while foldback current limiting reduces short-circuit current to 400mA-distinct from its 1.5A hard current limit under overload. The SOT89-5 package provides 150°C/W junction-to-ambient thermal resistance under standard layout conditions.

Key Specifications

Pinout & Package

SOT89-5 package: 5-pin surface-mount plastic package with exposed thermal pad on bottom (not electrically connected), optimized for medium-power dissipation in compact layouts.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MCP1700-1802E/TO and XC6210B182MR-G, the AP7361EA-18Y5-13 uniquely balances 1A continuous output, 68µA IQ, and SOT89-5 thermal robustness-making it the only viable choice for sustained 1.8V/1A loads in thermally constrained consumer enclosures.

Availability

AP7361EA-18Y5-13 is available at Aetrix Electronics and suitable for LCD monitor power rails, portable audio device analog supplies, set-top box interface rails, and smart home hub peripheral regulation requiring stable component supply across production volumes.

Supply support for AP7361EA-18Y5-13 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 AP7361EA belongs to Diodes' high-performance LDO regulator product line, engineered for low-noise, low-dropout power delivery in battery-powered and space-constrained consumer electronics where precision, efficiency, and reliability are critical.

FAQ

What is the minimum input voltage required for AP7361EA-18Y5-13 to maintain regulation at 1A load?

The AP7361EA-18Y5-13 requires VIN ≥ 2.2V per datasheet specifications. At 1A output, its dropout voltage for 1.8V output is approximately 400mV, so minimum functional input is 2.2V. However, for guaranteed 1.8V ±1% regulation across temperature and line/load variations, VIN ≥ 2.3V is recommended to provide margin against dropout increase at high temperature or low input.

Can AP7361EA-18Y5-13 be used without connecting the EN pin?

Yes-the EN pin can be tied directly to the IN pin to enable permanent operation. This configuration bypasses external control but maintains full regulator functionality. Leaving EN floating is not recommended, as it may cause erratic startup or oscillation due to noise coupling; a pull-up resistor to IN (e.g., 100kΩ) is acceptable if direct connection is impractical.

Is the SOT89-5 package of AP7361EA-18Y5-13 RoHS-compliant and halogen-free?

Yes-AP7361EA-18Y5-13 is fully RoHS 3 compliant (2015/863/EU), lead-free, and halogen- and antimony-free per Diodes' "Green" definition: Br < 900ppm, Cl < 900ppm (Br+Cl < 1500ppm), Sb < 1000ppm. The molding compound contains no intentionally added bromine, chlorine, or antimony compounds.

Does AP7361EA-18Y5-13 require a minimum load current to maintain regulation stability?

No-AP7361EA-18Y5-13 is stable with zero load current. The datasheet explicitly states "no minimum load is required to keep the device stable," and it remains regulated and within specification from 0A to 1.0A output. This eliminates need for dummy loads in standby or low-power modes.