Diodes Incorporated AP7361-12FGE-7

Overview

AP7361-12FGE-7 from Diodes Incorporated is a 1A fixed-output (1.2V) ultra-low dropout linear regulator in U-DFN3030-8 package, featuring 70µA typical quiescent current, 500mV dropout at 1A load, and integrated enable control. It delivers stable power to FPGA I/O rails, portable audio subsystems, and battery-powered microcontroller cores where low-noise, fast transient response, and thermal robustness are critical.

For engineers reviewing the AP7361-12FGE-7 datasheet, AP7361-12FGE-7 pinout, AP7361-12FGE-7 application, or AP7361-12FGE-7 equivalent, key selection criteria include dropout voltage at full load, EN logic thresholds, thermal resistance (θ_JA = 70°C/W), PSRR performance at 1kHz (65dB), and compatibility with ≥2.2µF ceramic output capacitors.

Technical Context

The AP7361-12FGE-7 implements a PMOS pass transistor architecture with a 0.8V internal bandgap reference, enabling precise 1.2V output regulation via feedback divider scaling. Its error amplifier drives the gate of the pass element to maintain regulation under line/load transients.

Enable functionality is implemented as a logic-high active input (VIH ≥ 1.0V) that controls an internal bias circuit-no external pull-up required. Thermal shutdown triggers at TJ ≈ 150°C with 20°C hysteresis, and current limiting clamps output at 1.1–1.5A depending on input voltage and temperature.

Key Specifications

Pinout & Package

U-DFN3030-8 (3.0mm × 3.0mm, 0.5mm pitch, exposed thermal pad) provides compact footprint and superior thermal performance versus SOT packages. Pin 1 is IN, Pin 2 is GND, Pin 3 is ADJ/NC (not connected in fixed-voltage variant), Pin 4 is GND, Pin 5 is EN, Pin 6 is NC, Pin 7 is NC, Pin 8 is OUT.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MCP1703T-1202E/MB and XC6210B122MR-G, AP7361-12FGE-7 uniquely balances full 1A capability, integrated thermal/current protection, and 70µA operating IQ in a thermally efficient 3×3mm DFN-making it optimal for ruggedized portable and industrial applications where reliability under load and temperature stress is non-negotiable.

Availability

AP7361-12FGE-7 is available at Aetrix Electronics and suitable for FPGA I/O power, battery-powered sensor nodes, and USB-C peripheral rails requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for AP7361-12FGE-7 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, with design centers in Asia, Europe, and North America and manufacturing in Taiwan and China.

The AP7361 belongs to Diodes' high-performance LDO portfolio targeting portable, industrial, and computing applications where low dropout, fast transient response, and robust protection features are essential for system-level reliability.

FAQ

What is the minimum input voltage required for AP7361-12FGE-7 to regulate 1.2V output at 1A?

The minimum input voltage is calculated as V_OUT + V_DROPOUT = 1.2V + 0.5V = 1.7V. However, the absolute minimum specified input is 2.2V per datasheet-this ensures guaranteed regulation across all conditions including worst-case dropout, temperature, and tolerance. Operating below 2.2V risks loss of regulation or thermal shutdown.

Can AP7361-12FGE-7 be used without an enable signal?

Yes. The EN pin can be tied directly to the IN pin to maintain permanent operation. This configuration draws only 70µA quiescent current and eliminates external control complexity. Ensure the IN rail remains within 2.2–6.0V during system power-up to avoid violating EN logic thresholds.

Is a minimum load required for stability with AP7361-12FGE-7?

No minimum load is required. The device remains stable and fully regulated down to zero load current, as confirmed in the datasheet's "No Load Stability" section. This makes it ideal for intermittent-load applications like sensor wake-up circuits where output may sit idle for extended periods.

What is the maximum allowable power dissipation for AP7361-12FGE-7 in its U-DFN3030-8 package?

Maximum power dissipation is limited by junction temperature: P_D(max) = (T_J(max) − T_A) / θ_JA. At T_A = +85°C, P_D(max) = (150°C − 85°C) / 70°C/W ≈ 930mW. For a 1.2V output at 1A, this corresponds to max input voltage of ~2.13V (since P_D = (V_IN − 1.2V) × 1A). Higher input voltages require derating or enhanced PCB thermal design.