Diodes Incorporated AP7365-33SNG-7

Overview

AP7365-33SNG-7 from Diodes Incorporated is a fixed-output 3.3V, 600mA low-dropout linear regulator in U-DFN2020-6 package, featuring 35μA quiescent current, 300mV dropout at full load, and fast 200μs startup. It integrates enable control, thermal shutdown, and current limiting, and is optimized for battery-powered portable electronics requiring stable low-noise core/I/O voltage.

For engineers reviewing the AP7365-33SNG-7 datasheet, AP7365-33SNG-7 pinout, AP7365-33SNG-7 application, or AP7365-33SNG-7 equivalent, key selection criteria include dropout voltage at 600mA, PSRR at 1kHz, thermal resistance (θ_JA = 132°C/W), EN logic thresholds, and stability with 1μF ceramic output capacitor.

Technical Context

The AP7365-33SNG-7 implements a PMOS pass transistor architecture enabling ultra-low dropout and high PSRR (65dB @ 1kHz). Its internal 0.8V bandgap reference and error amplifier regulate output precisely across -40°C to +85°C ambient range.

Enable functionality uses active-high logic with VIH ≥ 1.4V and VIL ≤ 0.4V; shutdown current is 0.1μA. Protection circuitry includes foldback current limit (~1.4A), short-circuit clamp (~240mA), and thermal shutdown at +145°C with +15°C hysteresis.

Key Specifications

Pinout & Package

AP7365-33SNG-7 is housed in a 2.0mm × 2.0mm, 0.65mm height, thermally enhanced U-DFN2020-6 package with exposed thermal pad (pin 1–6 layout). The package supports high-density PCB layouts and efficient heat dissipation via the bottom-side thermal pad.

Key Features

Applications

Equivalent & Alternatives

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

Compared with AP7361-33SNG-7, the AP7365-33SNG-7 delivers double the output current (600mA vs. 300mA) without increasing quiescent current or package size-enabling single-LDO power for higher-performance MCUs. Against MCP1700-3302E/MB, it adds critical EN control and robust fault protection at modest IQ penalty, making it suitable for industrial and medical edge devices.

Availability

AP7365-33SNG-7 is available at Aetrix Electronics and suitable for wearable health sensors, FPGA I/O power rails, smart home motion detectors, and portable medical ultrasound probes requiring stable component supply with guaranteed long-term sourcing.

Supply support for AP7365-33SNG-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 manufacturer of discrete semiconductors and analog ICs, specializing in high-reliability power management, signal integrity, and protection solutions for industrial, computing, and consumer markets.

The AP7365 series belongs to Diodes' low-quiescent-current LDO portfolio, designed specifically for battery-constrained portable and IoT applications demanding extended runtime, fast dynamic response, and robust fault tolerance.

FAQ

What is the minimum input voltage required for AP7365-33SNG-7 to maintain regulation at 600mA?

The AP7365-33SNG-7 requires VIN ≥ 3.6V to sustain 3.3V output at 600mA, based on its 300mV maximum dropout voltage specification at that load. Below 3.6V, output voltage drops linearly with input; operation below 2.0V is outside recommended conditions and may cause instability.

Can AP7365-33SNG-7 operate without an output capacitor?

No. A minimum 1μF ceramic output capacitor with ESR >15mΩ is mandatory for stability, as confirmed in the datasheet's "Output Capacitor" section. Omitting it risks oscillation, excessive overshoot/undershoot during transients, and potential damage under load step changes.

Is the thermal pad on the U-DFN2020-6 package electrically connected?

Yes-the exposed thermal pad (connected to GND internally) must be soldered to a dedicated PCB thermal plane. This connection provides both mechanical anchoring and the primary thermal conduction path; failure to do so raises θ_JA above the rated 132°C/W and risks thermal shutdown under sustained 600mA load.

Does AP7365-33SNG-7 require a minimum load current to remain stable?

No. The device remains stable and fully regulated at zero load, as explicitly stated in the "No Load Stability" section of the datasheet. Unlike some older LDOs, it does not require a minimum output current or pull-down resistor to maintain regulation.