Diodes Incorporated AP7363-33D-13

Overview

AP7363-33D-13 from Diodes Incorporated is a fixed-output 3.3V, 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 supplies in routers and STBs with fast transient response and 10µF ceramic capacitor stability.

For engineers reviewing the AP7363-33D-13 datasheet, AP7363-33D-13 pinout, AP7363-33D-13 application, or AP7363-33D-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 compatibility with low-ESR ceramic output capacitors without external compensation.

Technical Context

The AP7363-33D-13 implements an internally compensated LDO architecture with a 0.605V bandgap reference and PMOS pass element, enabling stable regulation across input voltages from 2.2V to 5.5V. Its feedback loop requires no external compensation due to built-in phase-margin optimization independent of output capacitor ESR.

Thermal shutdown activates at +170°C junction temperature with 10°C hysteresis, and current limiting clamps output at ~3.7A peak. The device operates across –40°C to +85°C ambient and maintains ±0.18% load regulation over 10mA–1.5A output current.

Key Specifications

Pinout & Package

AP7363-33D-13 uses the TO252-3L (DPAK) thermally enhanced surface-mount package with exposed tab electrically connected to GND. The tab must be soldered to ≥1 cm² copper pour for effective heat dissipation; θ_JA = 87.8°C/W on 2"×2" FR-4 board.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MCP1703T-3302E/MB and TPS7A2033PDQNR, AP7363-33D-13 uniquely combines 1.5A output, sub-200mV dropout, full fault protection, and TO252 thermal performance-making it the only viable choice for high-current, thermally demanding industrial and networking applications.

Availability

AP7363-33D-13 is available at Aetrix Electronics and suitable for FPGA I/O rail regulation, ASIC power supplies in routers, and SMPS post-regulation requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.

Supply support for AP7363-33D-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 solutions for industrial, computing, and communications markets.

The AP7363 product line delivers high-current, ultra-low-dropout LDOs targeting noise-sensitive, thermally constrained applications such as FPGA core/I/O supplies and ASIC power domains in networking and consumer electronics.

FAQ

What is the minimum input voltage required for AP7363-33D-13 to regulate 3.3V at 1.5A?

The minimum input voltage is 3.49V, calculated as 3.3V + 190mV dropout. Below this, the device enters dropout and output voltage drops linearly with input. Input must remain ≥2.2V for basic functionality, but regulation requires sufficient headroom per load current.

Can AP7363-33D-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 zero capacitance will cause oscillation and regulation failure. Minimum recommended value is 10µF.

Is the exposed thermal pad on the TO252 package electrically connected?

Yes. The exposed pad (Tab) is electrically connected to the internal GND node and must be soldered to a PCB ground plane. It serves both thermal dissipation and electrical grounding functions; relying solely on the GND pin without tab connection risks thermal shutdown under 1.5A load.

Does AP7363-33D-13 require a specific input capacitor type or value?

A minimum 2.2µF ceramic capacitor is required between IN and GND. A 10µF ceramic improves transient response. Larger values are acceptable; no ESR limits apply. Place the capacitor within 3mm of the IN and GND pins using wide, low-inductance traces for optimal noise rejection.