Diodes Incorporated AP7361EA-Y5-13

Overview

AP7361EA-Y5-13 from Diodes Incorporated is a 1A adjustable/fixed-mode ultra-low dropout linear regulator in SOT89-5 package, featuring ±1% output voltage accuracy, 360mV dropout at 3.3V/1A, and 68µA typical quiescent current. It integrates enable control, thermal shutdown, foldback current limiting (400mA short-circuit), and stable operation with ≥2.2µF MLCC output capacitors. Used in LCD TV power rails where compact size and low-noise 3.3V/1.8V regulation are critical.

For engineers reviewing the AP7361EA-Y5-13 datasheet, AP7361EA-Y5-13 pinout, AP7361EA-Y5-13 application, or AP7361EA-Y5-13 equivalent, this page delivers verified electrical parameters, package-specific terminal mapping, real-world use cases in consumer power systems, and validated alternative LDOs for design flexibility and supply continuity.

Technical Context

The AP7361EA-Y5-13 implements a PMOS pass transistor architecture enabling ultra-low dropout (e.g., 340mV at 3.3V/1A) and high PSRR (75dB @ 1kHz). Its internal 0.8V bandgap reference feeds an error amplifier that controls gate drive to maintain regulation across input voltages from 2.2V to 6.0V.

Enable logic operates with VIH ≥ 1.0V and VIL ≤ 0.3V; EN pin is active-high and functional in SOT89-5. Thermal shutdown triggers at +150°C with 20°C hysteresis, and current limiting engages at 1.5A (foldback to 400mA under short circuit), ensuring robust fault protection without external components.

Key Specifications

Pinout & Package

SOT89-5 package: 5-pin thermally enhanced plastic package with exposed tab connected to GND; footprint optimized for moderate power dissipation (800mW max) and manual or automated assembly.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar low-dropout linear regulator applications.

Compared with MCP1703T-3302E/MB and TLS850B2TE/V33, the AP7361EA-Y5-13 uniquely balances 1A capability, ultra-low dropout, enable control, and consumer-grade cost in a compact SOT89-5 package - making it optimal for mid-power portable and home entertainment systems requiring both efficiency and reliability.

Availability

AP7361EA-Y5-13 is available at Aetrix Electronics and suitable for LCD TV power rails, set-top box audio subsystems, and smart appliance control boards requiring stable component supply, long-term manufacturability, and RoHS-compliant sourcing.

Supply support for AP7361EA-Y5-13 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 ICs for power management, signal integrity, and connectivity applications.

The AP7361EA belongs to Diodes' high-performance LDO family engineered for consumer, computing, and industrial power systems demanding low dropout, low IQ, and robust protection - especially where space-constrained SOT89-5 integration is preferred over larger packages.

FAQ

What is the maximum allowable input voltage for AP7361EA-Y5-13?

The absolute maximum input voltage is 6.5V, but the recommended operating range is 2.2V to 6.0V. Exceeding 6.0V risks violating safe operating area limits, especially under high ambient temperature or heavy load conditions. For 5V rail applications, ensure transient spikes remain below 6.5V via input filtering.

Can AP7361EA-Y5-13 operate without an output capacitor?

No - a minimum 2.2µF ceramic output capacitor is required for stability across all operating conditions. Omitting it causes oscillation and potential device failure. The datasheet confirms stable operation only with ≥2.2µF MLCC, E-cap, or solid tantalum; no-load stability does not eliminate this requirement.

Is the ADJ pin used in the AP7361EA-Y5-13 variant?

No - the "Y5" suffix indicates the SOT89-5 package with fixed output voltage; the ADJ pin is internally disconnected (NC) and must be left floating or tied to OUT per datasheet guidance. Only adjustable versions (e.g., AP7361EA-ADJ-Y5-13) utilize the ADJ pin for resistor-divider programming.

How does thermal performance differ between SOT89-5 and U-DFN3030-8 packages?

SOT89-5 has θJA = 150°C/W, limiting usable power dissipation to ~800mW at +85°C ambient; U-DFN3030-8 achieves θJA = 70°C/W with proper thermal vias, supporting ~1700mW. For 1A loads at 3.3V dropout, SOT89-5 requires careful copper area design, while U-DFN3030-8 offers superior thermal headroom in space-constrained layouts.