Diodes Incorporated AP7361C-15FGE-7

Overview

AP7361C-15FGE-7 from Diodes Incorporated is a 1A fixed-output (1.5V) ultra-low dropout linear regulator in U-DFN3030-8 (Type E) package, featuring 360mV dropout at 1A, ±1% output accuracy, and 60µA quiescent current. It integrates enable control, thermal shutdown, fold-back short-circuit protection (400mA), and current limiting (1.5A), making it suitable for space-constrained, battery-powered applications such as portable audio devices and LCD display bias rails.

For engineers reviewing the AP7361C-15FGE-7 datasheet, AP7361C-15FGE-7 pinout, AP7361C-15FGE-7 application, or AP7361C-15FGE-7 equivalent, key selection criteria include dropout voltage at full load, EN logic thresholds (VIH = 1.0V min, VIL = 0.3V max), stability with ≥2.2µF MLCC output capacitors, and thermal resistance (θJA = 70°C/W) for ambient temperatures up to +85°C.

Technical Context

The AP7361C-15FGE-7 implements a PMOS pass transistor architecture enabling ultra-low dropout operation and high PSRR (75dB @ 1kHz). Its internal 0.8V bandgap reference feeds an error amplifier that regulates output via feedback from the ADJ/NC pin - unused in fixed 1.5V configuration but retained for pin compatibility across variants.

Enable functionality is implemented with active-high EN pin (1.0V min VIH), integrated 3.0MΩ pull-down resistor, and sub-0.05µA shutdown current. Protection circuitry includes fold-back current limiting triggered at ~1.1A and thermal shutdown activation at +150°C with 20°C hysteresis.

Key Specifications

Pinout & Package

U-DFN3030-8 (Type E) package with wettable flank leads, 0.5mm pitch, and exposed thermal pad (Pin 4) for enhanced heat dissipation. Pin 1: IN, Pin 2: GND, Pin 3: OUT, Pin 4: GND (thermal pad), Pin 5: EN, Pin 6: NC, Pin 7: NC, Pin 8: GND.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MCP1700T-1502E/TT and TLS850F1BTV50, AP7361C-15FGE-7 uniquely balances 1A output, ultra-low dropout, integrated EN, and full protection suite in a 3×3mm DFN - making it optimal for space-constrained industrial and portable systems requiring robustness without automotive certification overhead.

Availability

AP7361C-15FGE-7 is available at Aetrix Electronics and suitable for portable audio systems, LCD display bias rails, industrial sensor nodes, and USB-C peripheral power requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.

Supply support for AP7361C-15FGE-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 manufacturer specializing in discrete, analog, and mixed-signal solutions, with operations certified to IATF 16949:2016 and ISO 9001 standards.

The AP7361C belongs to Diodes' high-performance LDO regulator product line, designed specifically for low-noise, low-dropout power management in battery-powered and space-constrained applications demanding precision, efficiency, and reliability.

FAQ

What is the minimum input voltage required for AP7361C-15FGE-7 to maintain 1.5V output at 1A load?

The minimum input voltage is calculated as VOUT + VDROPOUT = 1.5V + 0.36V = 1.86V. However, the device's absolute minimum specified VIN is 2.2V per datasheet operating conditions. Therefore, reliable 1A operation requires VIN ≥ 2.2V to ensure regulation, stability, and protection circuit functionality across temperature and process variation.

Can AP7361C-15FGE-7 be used without connecting the EN pin?

Yes - the EN pin has an internal 3.0MΩ pull-down resistor, so leaving it unconnected defaults the device to OFF state. To enable operation, EN must be actively driven to ≥1.0V. For always-on use, connect EN directly to IN; do not tie to VOUT or floating nodes to avoid unintended shutdown or oscillation.

Is the U-DFN3030-8 (Type E) package of AP7361C-15FGE-7 compatible with standard reflow profiles?

Yes - the package is rated for moisture sensitivity level 1 per J-STD-020 and supports standard IPC/JEDEC J-STD-020D reflow profiles. Its matte tin-plated leads meet MIL-STD-202 Method 208 solderability requirements, and the thermal pad must be connected to a solid copper pour with ≥4 thermal vias for reliable heat transfer and mechanical anchoring.

Does AP7361C-15FGE-7 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. X5R or X7R dielectrics are recommended due to stable capacitance over voltage and temperature. Tantalum or polymer capacitors may be used if ESR is 10–100mΩ, but aluminum electrolytics are discouraged due to higher ESR and aging effects.