Diodes Incorporated AP7361EA-10ER-13

Overview

AP7361EA-10ER-13 from Diodes Incorporated is a 1A, fixed-output (1.0V), ultra-low dropout linear regulator with enable functionality, designed for power rail regulation in space-constrained, low-power systems. It delivers ±1% output voltage accuracy, 360mV dropout at 1A (for 3.3V variant; 1.0V variant specified at 840mV), and 68µA typical quiescent current - enabling efficient operation in battery-powered audio/video equipment and LCD monitors.

For engineers reviewing the AP7361EA-10ER-13 datasheet, AP7361EA-10ER-13 pinout, AP7361EA-10ER-13 application, or AP7361EA-10ER-13 equivalent, key selection criteria include dropout performance at 1.0V output, thermal shutdown threshold (150°C), EN logic thresholds (VIH = 1.0V min), stability with ≥2.2µF MLCC output capacitors, and SOT223R package thermal resistance (θJA = 110°C/W).

Technical Context

The AP7361EA-10ER-13 integrates a PMOS pass element, precision 0.8V bandgap reference, error amplifier, and foldback current limiting. Its adjustable/fixed architecture supports both resistor-divider configuration (ADJ pin) and factory-set outputs - this variant is fixed at 1.0V, eliminating external feedback components.

Enable control is implemented via a high-threshold logic input (VIH ≥ 1.0V), with internal 3.0MΩ pull-down resistor ensuring default-off behavior. Protection features include thermal shutdown with 20°C hysteresis, short-circuit current limiting to 400mA, and 1.5A peak current limit - all operating independently of load or ambient conditions.

Key Specifications

Pinout & Package

The AP7361EA-10ER-13 is packaged in SOT223R - a thermally enhanced variant of SOT223 with exposed pad optimized for PCB copper area attachment. Thermal resistance is θJA = 110°C/W under standard FR-4 layout conditions.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MCP1703T-1002E/MB and TLS850B2TE/V2, the AP7361EA-10ER-13 uniquely balances 1A output capability, 840mV dropout at 1.0V, and 68µA IQ - making it optimal for cost-sensitive industrial and consumer devices needing full-amperage fixed 1.0V regulation without automotive qualification overhead.

Availability

AP7361EA-10ER-13 is available at Aetrix Electronics and suitable for LCD TV power management, set-top box core supply, and smart home appliance MCU rail applications requiring stable component supply, consistent parametric performance, and long-term production continuity.

Supply support for AP7361EA-10ER-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 specifically for low-dropout, low-quiescent-current operation in portable, battery-powered, and space-constrained consumer electronics.

FAQ

What is the minimum input voltage required for stable 1.0V output at 1A load?

The AP7361EA-10ER-13 requires VIN ≥ VOUT + VDROPOUT = 1.0V + 0.84V = 1.84V minimum for 1A operation. However, the absolute minimum specified input is 2.2V per datasheet - this ensures guaranteed performance across temperature, process variation, and line regulation. Below 2.2V, regulation may degrade or cease.

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

The EN pin must never be left floating. It has an internal 3.0MΩ pull-down resistor, but noise susceptibility and undefined logic state risk erratic enable/disable behavior. For fixed-on operation, tie EN directly to IN. For controlled sequencing, drive with a clean logic signal meeting VIH ≥ 1.0V and VIL ≤ 0.3V specifications.

Is the SOT223R package pin-compatible with standard SOT223?

Yes - the SOT223R is a drop-in replacement for standard SOT223 with identical pinout (IN-GND-OUT-EN) and mechanical footprint. The "R" suffix denotes enhanced thermal performance via optimized internal die attach and exposed pad design, yielding lower θJA (110°C/W vs. 120°C/W for legacy SOT223).

Does the AP7361EA-10ER-13 require an external output capacitor, and what type is recommended?

Yes - a minimum 2.2µF ceramic capacitor is required between OUT and GND for stability. MLCCs are preferred due to low ESR; tantalum or polymer capacitors ≥2.2µF are also acceptable. Larger values improve load transient response but do not affect basic regulation stability.