Diodes Incorporated AP7361E-28FGE-7

Overview

AP7361E-28FGE-7 from Diodes Incorporated is a 1A fixed-output (2.8V) ultra-low dropout linear regulator with enable and power-good functions, designed for point-of-load regulation in space-constrained, battery-powered systems. It delivers ±1% output accuracy, 360mV dropout at 1A (for 3.3V variant; 2.8V dropout is 340mV typ), 60µA quiescent current, and operates across 2.2V–6.0V input range - enabling use in USB-powered peripherals and portable audio devices.

For engineers reviewing the AP7361E-28FGE-7 datasheet, AP7361E-28FGE-7 pinout, AP7361E-28FGE-7 application, or AP7361E-28FGE-7 equivalent, key selection criteria include its U-DFN3030-8 (Type E) thermal performance (θJA = 70°C/W), PG threshold accuracy (±3% window), fold-back short-circuit protection (400mA), and compatibility with ≥2.2µF MLCC output capacitors without external compensation.

Technical Context

The AP7361E-28FGE-7 integrates a PMOS pass transistor, bandgap reference (0.8V), error amplifier, and open-drain PG comparator with hysteresis (10°C). Its fixed 2.8V output is internally trimmed; no external feedback resistors are required. The EN pin enables logic-level control (VIH = 1.0V min) with 3.0MΩ internal pull-down, supporting sequencing in multi-rail systems.

Thermal shutdown activates at +150°C with +20°C hysteresis, and current limiting triggers at 1.5A (typ) with fold-back to 400mA during sustained short-circuit events. PSRR reaches 75dB at 1kHz, making it suitable for noise-sensitive analog rails like ADC references or audio codec supplies.

Key Specifications

Pinout & Package

AP7361E-28FGE-7 uses the U-DFN3030-8 (Type E) package: 3.0mm × 3.0mm × 0.6mm body with exposed thermal pad, moisture sensitivity level 1, and NiPdAu-plated terminals.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MCP1703T-2802E/MB and XC6210B282MR-G, AP7361E-28FGE-7 uniquely balances 1A drive capability, ultra-low dropout, integrated PG/EN, and compact U-DFN3030-8 packaging - making it the only choice for space-constrained, sequenced, medium-current applications requiring full fault protection.

Availability

AP7361E-28FGE-7 is available at Aetrix Electronics and suitable for LCD-TVs and monitors, USB-powered peripherals, and industrial sensor nodes requiring stable component supply, long-term lifecycle support, and RoHS-compliant sourcing.

Supply support for AP7361E-28FGE-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 solutions, with design centers in Asia, Europe, and the US, and manufacturing in ISO/TS 16949-certified facilities.

The AP7361E belongs to Diodes' high-performance LDO family targeting portable, battery-powered, and noise-sensitive applications - engineered for minimal dropout, low IQ, and robust fault protection in compact packages.

FAQ

What is the minimum input voltage required for AP7361E-28FGE-7 to maintain regulation at 1A load?

The minimum input voltage is calculated as VOUT + VDROPOUT = 2.8V + 0.34V = 3.14V (typical). At worst-case conditions (–40°C, 1A, 2.8V output), dropout may reach 500mV, requiring VIN ≥ 3.3V. A 3.3V or higher input rail ensures guaranteed regulation across temperature and process variation.

Can AP7361E-28FGE-7 operate without an external output capacitor?

No. A minimum 2.2µF ceramic capacitor is mandatory between OUT and GND for stability, as confirmed in the datasheet's "Stable with MLCC, E-Cap, Tan-Cap or Solid Capacitor ≥ 2.2µF" feature. Omitting it causes oscillation and potential device failure under load.

How does the PG pin behave during thermal shutdown?

During thermal shutdown, the output is disabled and VOUT collapses below the VPGF threshold (2.29V), causing the PG pin to be actively pulled low via the internal MOSFET. This provides unambiguous fault indication to system supervisors independent of EN state.

Is the U-DFN3030-8 (Type E) package compatible with standard reflow profiles?

Yes. With Moisture Sensitivity Level 1 per J-STD-020 and peak reflow temperature rating up to 260°C, the U-DFN3030-8 (Type E) package supports standard lead-free reflow processes without baking requirements, provided PCB layout follows Diodes' recommended pad dimensions and thermal via guidelines.