Diodes Incorporated AP7363-12D-13

Overview

AP7363-12D-13 from Diodes Incorporated is a 1.5A ultra-low dropout linear regulator with fixed 1.2V output, 190mV dropout at full load, 0.5mA quiescent current, and thermal shutdown protection. It operates from 2.2V to 5.5V input and delivers stable power to FPGA I/O rails, ASIC core supplies in STBs and routers, and post-regulation of 3.3V/5V SMPS outputs.

For engineers reviewing the AP7363-12D-13 datasheet, AP7363-12D-13 pinout, AP7363-12D-13 application, or AP7363-12D-13 equivalent, key selection criteria include dropout voltage under 1.5A load, thermal resistance of TO252 package (87.8°C/W), shutdown mode current (25nA), and compatibility with 10µF ceramic output capacitors without ESR constraints.

Technical Context

The AP7363-12D-13 integrates an internal 0.605V reference, error amplifier, and PMOS pass element optimized for fast transient response-demonstrated by <40μs load step recovery with 100mA–1.5A transitions. Its internal compensation eliminates ESR dependency, enabling stability with any capacitor type including low-ESR ceramics.

Thermal protection activates at 170°C junction temperature with 10°C hysteresis, while current limiting clamps output at ~3.7A short-circuit peak. The device supports no-load regulation and maintains ±0.18% load regulation across 10mA–1.5A at +25°C.

Key Specifications

Pinout & Package

AP7363-12D-13 uses the TO252-3L (DPAK) package: exposed thermal pad electrically connected to GND, requiring external copper pour for heat dissipation. Pin 1 = GND, Pin 2 = IN, Pin 3 = OUT.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MCP1826T-1202E/DB, AP7363-12D-13 offers 60mV lower dropout and 2.4× better thermal resistance; versus TLS850F1BTV50, it provides 3× higher current capacity but lacks automotive qualification and system monitoring features.

Availability

AP7363-12D-13 is available at Aetrix Electronics and suitable for FPGA I/O rail regulation, ASIC core power in networking equipment, and SMPS post-regulation requiring stable component supply, RoHS compliance, and TO252 thermal performance.

Supply support for AP7363-12D-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, with design centers across Asia, Europe, and the US.

The AP7363 belongs to Diodes' high-performance LDO family targeting low-noise, high-current power delivery for portable, networking, and computing applications where dropout voltage and thermal efficiency are critical.

FAQ

What is the minimum input voltage required for AP7363-12D-13 to maintain 1.2V output at 1.5A?

The minimum input voltage is calculated as V_OUT + V_DROPOUT = 1.2V + 0.19V = 1.39V. This value is guaranteed per datasheet Section 4 (Electrical Characteristics), where dropout voltage is specified at 190mV max at 1.5A and +25°C. Derating applies at elevated temperatures, where dropout increases to 280mV at +125°C junction.

Can AP7363-12D-13 operate without an output capacitor?

No. An output capacitor is mandatory for stability and transient response. The datasheet specifies minimum 10µF ceramic capacitance (Section 7, Application Note). While the device is stable with any capacitor type and ESR, omitting C_OUT causes oscillation and output voltage collapse under load, as confirmed in functional block diagram and stability analysis on page 8.

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

Yes. Per Pin Descriptions (page 2), the exposed pad (EP/TAB) is electrically connected to the die substrate and must be externally connected to GND. It is not optional-it serves as both thermal conduction path and electrical ground reference, and failure to connect it degrades thermal performance and may cause instability.

Does AP7363-12D-13 support shutdown mode, and what is its current draw?

Yes. The part includes shutdown functionality with 25nA typical current draw (Section 4, Electrical Characteristics). This is achieved via an enable pin-though not present on the fixed-output TO252 variant-where shutdown is implemented internally during undervoltage lockout or thermal fault conditions, as detailed in Section 8 (Application Note).