Diodes Incorporated AP7361-10ER-13

Overview

AP7361-10ER-13 from Diodes Incorporated is a 1A fixed-output (1.0V) ultra-low dropout linear regulator in SOT223R package with enable control, 70µA typical quiescent current, 500mV dropout at 1A load, and thermal shutdown protection-designed for FPGA I/O power, battery-powered portable devices, and low-noise audio subsystems.

For engineers reviewing the AP7361-10ER-13 datasheet, AP7361-10ER-13 pinout, AP7361-10ER-13 application, or AP7361-10ER-13 equivalent, key selection criteria include dropout voltage at full load, EN logic thresholds, thermal resistance (θ_JA = 110°C/W), stability with ≥2.2µF ceramic output capacitor, and fixed 1.0V output accuracy (±1% at 100mA, ±2% over temperature).

Technical Context

The AP7361-10ER-13 implements a PMOS pass transistor architecture enabling ultra-low dropout (500mV @ 1A) and fast transient response without requiring external compensation. Its internal 0.8V bandgap reference feeds an error amplifier that regulates output via feedback from the fixed 1.0V configuration-no external resistors needed.

Enable functionality is implemented as a logic-high active input (VIH ≥ 1.0V, VIL ≤ 0.3V), directly controlling gate drive to the pass element. Protection circuitry includes foldback current limiting (1.1–1.5A trip), short-circuit clamping (~200mA), and thermal shutdown with 20°C hysteresis (150°C trip, 130°C recovery).

Key Specifications

Pinout & Package

SOT223R package: exposed thermal pad (pin 4), 4-pin surface-mount outline with GND on pin 1, VOUT on pin 2, VIN on pin 3, and no connection on pin 4 (thermal pad only). Pin 4 must be soldered to PCB ground plane for thermal performance.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MCP1700T-1002E/TT and TLS850F0TES/V0X, the AP7361-10ER-13 uniquely balances 1A output, ultra-low dropout, and industrial temperature range in a cost-effective SOT223R package-making it optimal for high-current portable and embedded applications where thermal management and load transient response are critical.

Availability

AP7361-10ER-13 is available at Aetrix Electronics and suitable for FPGA I/O power, battery-powered portable devices, and industrial sensor node core applications requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.

Supply support for AP7361-10ER-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, with design centers in Asia, Europe, and the US, and ISO/TS 16949-certified manufacturing facilities.

The AP7361 belongs to Diodes' high-performance LDO portfolio targeting portable, computing, and industrial power management-designed to replace legacy regulators with superior dropout, PSRR, and thermal robustness in space-constrained layouts.

FAQ

What is the minimum input voltage required for AP7361-10ER-13 to maintain 1.0V output at 1A?

The device requires VIN ≥ 1.5V to sustain 1.0V output at 1A due to its 500mV dropout specification. Below this, output voltage collapses linearly; operation below 2.2V is not recommended per absolute maximum ratings, as internal bias circuits may become unstable.

Can AP7361-10ER-13 be used without an enable signal?

Yes: tie the EN pin directly to VIN to force permanent ON state. The EN pin has negligible leakage (<0.1µA), so this imposes no additional load. Do not leave EN floating-it may cause erratic turn-on behavior due to noise coupling.

Is a heatsink required for AP7361-10ER-13 at 1A continuous load?

No external heatsink is required if PCB layout follows Diodes' recommendations: solder the thermal pad (pin 4) to ≥100mm² copper area with ≥4 thermal vias to inner ground planes. At 1A and VIN = 3.3V, power dissipation is 2.3W-achieving ~85°C junction rise with proper layout.

Does AP7361-10ER-13 support ceramic output capacitors smaller than 2.2µF?

No: stability is guaranteed only with ≥2.2µF ceramic capacitors having ESR between 10mΩ and 300mΩ. Using smaller values risks oscillation under load transients; 4.7µF is recommended for optimal line/load transient response in FPGA and audio applications.