Diodes Incorporated AP7361E-25FGE-7

Overview

AP7361E-25FGE-7 from Diodes Incorporated is a 1A fixed-output (2.5V), ultra-low dropout linear regulator in U-DFN3030-8 (Type E) package, featuring enable control, power-good monitoring, ±1% output accuracy, 360mV dropout at 1A (for 3.3V variant), and 60µA quiescent current-designed for stable local regulation in LCD-TVs, set-top boxes, and home appliances.

For engineers reviewing the AP7361E-25FGE-7 datasheet, AP7361E-25FGE-7 pinout, AP7361E-25FGE-7 application, or AP7361E-25FGE-7 equivalent, key selection criteria include its 2.5V fixed output, PG open-drain threshold (89–95% VOUT), thermal shutdown at +150°C, EN logic-high activation, and compatibility with ≥2.2µF MLCC output capacitors.

Technical Context

The AP7361E-25FGE-7 integrates a PMOS pass element, band-gap reference, error amplifier, and fold-back current limiting (400mA short-circuit clamp). Its fixed 2.5V output is internally trimmed; no external feedback resistors are required.

Power-good monitoring uses an internal comparator comparing VOUT against 89–95% of nominal voltage, driving an open-drain PG pin that requires an external 10kΩ–1MΩ pull-up. Enable logic operates with VIH ≥1.0V and VIL ≤0.3V, supporting direct MCU GPIO control.

Key Specifications

Pinout & Package

AP7361E-25FGE-7 is housed in a thermally enhanced U-DFN3030-8 (Type E) package with exposed thermal pad (pin #4 GND connected to die attach pad), 0.65mm pitch, and RoHS-compliant NiPdAu plating.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MCP1700T-2502E/MB, AP7361E-25FGE-7 delivers 4× higher current and adds PG monitoring; versus TLS850B2TE/V33, it offers smaller footprint and lower cost for industrial/consumer use but lacks AEC-Q100 certification and wide-VIN capability.

Availability

AP7361E-25FGE-7 is available at Aetrix Electronics and suitable for LCD-TVs, set-top boxes, and home appliance control systems requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.

Supply support for AP7361E-25FGE-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 manufacturing certified to IATF 16949 and quality systems aligned to AEC-Q standards.

The AP7361E belongs to Diodes' high-performance LDO family targeting consumer and industrial power management, emphasizing ultra-low dropout, low IQ, and integrated protection for compact, energy-efficient designs.

FAQ

What is the minimum input voltage required for AP7361E-25FGE-7 to maintain 2.5V output at 1A?

The minimum input voltage is calculated as VOUT + VDROPOUT = 2.5V + 0.25V = 2.75V (typical). At worst-case 2.5V output with 300mV dropout (max spec), VIN must be ≥2.8V to sustain 1A load across temperature and process variation. Below this, regulation fails and output drops.

Can the PG pin be connected directly to a 3.3V microcontroller GPIO without a pull-up resistor?

No-the PG pin is open-drain and requires an external pull-up resistor (10kΩ–1MΩ) to a valid voltage rail (≤6V). Connecting directly to a 3.3V GPIO without pull-up leaves PG floating, causing indeterminate logic states and potential MCU reset glitches during startup or fault conditions.

Is AP7361E-25FGE-7 compatible with ceramic output capacitors smaller than 2.2µF?

No-datasheet specifies ≥2.2µF MLCC for stability across all operating conditions. Using smaller values risks oscillation, especially under load transients, due to insufficient phase margin. The 2.2µF minimum ensures damping of the control loop's dominant pole and avoids instability at light-to-heavy load transitions.

Does the EN pin require a series resistor when driven by a 3.3V FPGA I/O bank?

No series resistor is needed. The EN pin has VIH = 1.0V min and VIL = 0.3V max, and FPGA 3.3V LVTTL outputs (VOH ≥2.4V, VOL ≤0.4V) meet these thresholds directly. Adding series resistance may slow edge rates and delay turn-on/turn-off timing beyond the specified 50µs tD and 30µs tPG.