Diodes Incorporated AP7363-25D-13

Overview

AP7363-25D-13 from Diodes Incorporated is a fixed-output 2.5V, 1.5A ultra-low dropout linear regulator in TO252-3L package, featuring 190mV dropout at full load, 0.5mA quiescent current, and integrated thermal shutdown and current limit protection. It delivers stable power to FPGA I/O rails and ASIC core supplies in routers and STBs with fast transient response and 10µF ceramic capacitor compatibility.

For engineers reviewing the AP7363-25D-13 datasheet, AP7363-25D-13 pinout, AP7363-25D-13 application, or AP7363-25D-13 equivalent, key selection criteria include dropout voltage at 1.5A, thermal resistance (θ_JA = 87.8°C/W), shutdown mode quiescent current (25nA), and stability with low-ESR ceramic output capacitors without external compensation.

Technical Context

The AP7363-25D-13 implements an internally compensated LDO architecture with a 0.605V bandgap reference and PMOS pass element, enabling ultra-low dropout operation down to 190mV at 1.5A. Its feedback loop requires no external compensation due to built-in phase-margin optimization across all capacitor ESR values.

Thermal protection activates at +170°C junction temperature with 10°C hysteresis, while current limiting clamps output at ~3.7A. The device operates across -40°C to +85°C ambient and supports input voltages from 2.2V to 5.5V - making it suitable for post-regulation from 3.3V or 5V system rails.

Key Specifications

Pinout & Package

AP7363-25D-13 uses the TO252-3L (DPAK) thermally enhanced package with exposed tab electrically connected to GND. The tab must be soldered to ≥2 cm² copper pour for effective heat dissipation; θ_JA = 87.8°C/W on 2"×2" FR-4 board with 2oz copper.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MCP1703T-2502E/MB and TLS850F2BTV50, the AP7363-25D-13 uniquely combines 1.5A output, 190mV dropout, TO252 thermal capability, and zero-ESR capacitor flexibility - making it the only viable choice for high-current, low-headroom, non-automotive LDO applications.

Availability

AP7363-25D-13 is available at Aetrix Electronics and suitable for FPGA I/O rail regulation, ASIC core power in networking equipment, and SMPS post-regulation in consumer electronics requiring stable component supply and long-term production continuity.

Supply support for AP7363-25D-13 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 devices, with emphasis on power management, signal integrity, and protection solutions.

The AP7363 belongs to Diodes' high-current LDO family designed specifically for post-regulation in space-constrained, thermally demanding applications such as networking infrastructure and multimedia consumer devices.

FAQ

What is the minimum input voltage required for AP7363-25D-13 to regulate 2.5V output?

The absolute minimum input voltage is 2.69V - calculated as 2.5V + 190mV dropout - but the recommended operating range starts at 2.2V per datasheet. Below 2.69V, the device enters dropout and cannot maintain regulation. For reliable 2.5V output under full 1.5A load, VIN must exceed 2.69V; derating is required at elevated temperatures where dropout increases to 280mV.

Can AP7363-25D-13 operate without an output capacitor?

No - an output capacitor is mandatory for stability and transient response. The device is stable with any 10µF ceramic capacitor (no ESR restrictions), but operation without C_OUT will cause oscillation and potential damage. The datasheet explicitly states "output capacitor is required to stabilize and help the transient response"; zero-load stability applies only when C_OUT is present.

Is the TO252 package's exposed tab electrically isolated?

No - the exposed tab (Pin 1/GND) is electrically connected to the silicon die substrate and must be soldered to the PCB ground plane. Diodes' datasheet confirms "the die is electrically connected to the exposed pad" and recommends external connection to GND. Using the tab as sole ground path violates layout guidelines; a separate GND pin connection is required for signal integrity.

Does AP7363-25D-13 support enable/shutdown control?

No - the AP7363-25D-13 is a fixed-output variant without an enable (EN) pin. Only adjustable versions (e.g., AP7363-ADJ) include EN functionality. This part has no shutdown mode except via input removal; its 25nA quiescent current specification applies only to the adjustable version with EN asserted low.