Diodes Incorporated AP7361E-15FGE-7

Overview

AP7361E-15FGE-7 from Diodes Incorporated is a 1A fixed-output low-dropout linear regulator with 1.5V output, enable control, and power-good monitoring in U-DFN3030-8 (Type E) package. It delivers ±1% output accuracy, 360mV dropout at 1A (for 3.3V version; 1.5V version exhibits ~500mV typical), 60µA quiescent current, and integrated thermal shutdown, current limit, and fold-back short-circuit protection. It powers core rails in LCD-TVs, set-top boxes, and home appliances where stable low-noise voltage and sequencing capability are required.

For engineers reviewing the AP7361E-15FGE-7 datasheet, AP7361E-15FGE-7 pinout, AP7361E-15FGE-7 application, or AP7361E-15FGE-7 equivalent, key selection criteria include its 1.5V fixed output, 2.2–6.0V input range, PG open-drain threshold behavior (92% rising, 82% falling), EN logic-high activation, and stability with ≥2.2µF MLCC output capacitors.

Technical Context

The AP7361E-15FGE-7 implements a PMOS pass transistor architecture enabling ultra-low dropout and fast transient response. Its internal 0.8V bandgap reference feeds an error amplifier that regulates output via feedback from the ADJ/NC pin - though unused in this fixed 1.5V variant, the pin remains present per package compatibility.

Power-good monitoring uses a precision comparator comparing VOUT against 92% (rising) and 82% (falling) of nominal output; the open-drain PG pin requires external pull-up (10kΩ–1MΩ). Enable logic accepts VIH ≥1.0V and tolerates VIL ≤0.3V, with internal 3.0MΩ EN pull-down ensuring default-off behavior when unconnected.

Key Specifications

Pinout & Package

AP7361E-15FGE-7 is housed in a thermally enhanced U-DFN3030-8 (Type E) package with exposed thermal pad (pin #4 GND connected to pad). The 3.0mm × 3.0mm footprint supports high-density layouts and efficient heat dissipation via PCB thermal vias.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MCP1703T-1502E/MB and XC6210B152MR-G, AP7361E-15FGE-7 uniquely combines 1A capability, integrated PG, and U-DFN3030-8 thermal performance - making it the only option among the three capable of powering demanding 1.5V loads while enabling robust system-level power sequencing and fault reporting.

Availability

AP7361E-15FGE-7 is available at Aetrix Electronics and suitable for LCD-TVs, set-top boxes, and home electrical appliances requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.

Supply support for AP7361E-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 company specializing in discrete, analog, and mixed-signal devices, with emphasis on power management, signal integrity, and connectivity solutions.

The AP7361E belongs to Diodes' high-performance LDO portfolio designed for consumer, industrial, and computing applications demanding low dropout, low IQ, and integrated protection features in compact packages.

FAQ

What is the minimum input voltage required for AP7361E-15FGE-7 to maintain 1.5V output at 1A?

The device requires VIN ≥ VOUT + VDROPOUT. At 1A and 1.5V output, typical dropout is 500mV, so minimum input is 2.0V. However, the absolute minimum specified input is 2.2V per datasheet - thus 2.2V is the guaranteed operational floor under all conditions including temperature and tolerance.

Can the PG pin be pulled up to a voltage higher than the IN pin?

Yes - the PG pin is open-drain and rated for pull-up voltages up to 6V, which may exceed the IN voltage. This allows direct connection to a higher auxiliary rail (e.g., 3.3V or 5V) for reset generation, independent of the LDO's input supply.

Is an external resistor divider required for AP7361E-15FGE-7?

No - the "15" suffix denotes fixed 1.5V output. Pin 3 (ADJ/NC) is internally connected to the feedback network and must be left unconnected (NC). Adding external resistors would disrupt regulation and is prohibited.

How does thermal shutdown behave during sustained overload?

When junction temperature reaches +150°C, the output disables. After cooling to ~+130°C (20°C hysteresis), output re-enables. Under continuous overload, this causes cycling - limiting average power dissipation but requiring thermal design (copper area, vias) to minimize frequency and prevent system instability.