Diodes Incorporated AP7362A-33SP-13

Overview

AP7362A-33SP-13 from Diodes Incorporated is a 3.3V fixed-output, 1.5A ultra-low dropout linear regulator in SO-8EP package with active-high enable, 190mV dropout at full load, ±1.5% output voltage accuracy at +25°C, and stable operation with 10µF ceramic input/output capacitors. It delivers regulated power to FPGA I/O rails and ASIC cores in networking equipment.

For engineers reviewing the AP7362A-33SP-13 datasheet, AP7362A-33SP-13 pinout, AP7362A-33SP-13 application, or AP7362A-33SP-13 equivalent, key selection criteria include dropout voltage under 1.5A load, EN logic thresholds (VIH ≥ 1.4V, VIL ≤ 0.65V), thermal shutdown at +170°C, PSRR of 65dB at 120Hz, and SO-8EP thermal resistance (θJA = 52.8°C/W).

Technical Context

The AP7362A-33SP-13 integrates a PMOS pass element with internal 0.605V reference, current-limit protection, and thermal shutdown circuitry. Its internal compensation enables stability with any capacitor type-no ESR constraints-and supports fast transient response due to high loop bandwidth.

It operates across 2.2V–5.5V input range and maintains regulation down to 190mV VIN–VOUT differential at 1.5A. The EN pin directly controls gate driver activation, with 25μs turn-on/turn-off delay and 25nA shutdown quiescent current.

Key Specifications

Pinout & Package

AP7362A-33SP-13 uses the SO-8EP (exposed pad) thermally enhanced package. The exposed pad must be connected to GND via multiple vias to a large copper pour for effective heat dissipation; θJA = 52.8°C/W under standard 2"×2" FR-4 test board conditions.

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 TLS850F3TAV50, AP7362A-33SP-13 uniquely combines 1.5A output, SO-8EP thermal performance, and 190mV dropout in a commercial-grade part-enabling compact, high-current 3.3V regulation where alternatives fall short on current or thermal capability.

Availability

AP7362A-33SP-13 is available at Aetrix Electronics and suitable for FPGA I/O power supplies, ASIC core regulation, and SMPS post-regulation requiring stable component supply, consistent parametric performance, and long-term industrial lifecycle support.

Supply support for AP7362A-33SP-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 company specializing in discrete, analog, and mixed-signal ICs for power management, signal integrity, and connectivity applications.

The AP7362 series belongs to Diodes' high-performance LDO portfolio, designed specifically for low-dropout, high-current regulation in space-constrained computing and networking systems where thermal efficiency and transient response are critical.

FAQ

What is the minimum input voltage required for AP7362A-33SP-13 to maintain 3.3V output at 1.5A?

The minimum input voltage is 3.49V, calculated as VOUT + VDROPOUT = 3.3V + 0.19V. At 1.5A load and +25°C, the guaranteed maximum dropout is 240mV per datasheet, so 3.54V ensures margin. Below this, output voltage collapses nonlinearly due to pass transistor saturation.

Can AP7362A-33SP-13 operate without an output capacitor?

No. Although the device is stable with any 10µF capacitor type, an output capacitor is mandatory for transient response and loop stability. Removing it causes severe overshoot/undershoot during load steps and risks oscillation. Minimum recommended value is 10µF ceramic placed adjacent to OUT and GND pins.

Is the exposed pad (EP) of the SO-8EP package electrically connected to GND?

Yes. The exposed pad is internally connected to the die substrate and must be externally soldered to a GND copper plane using ≥4 thermal vias. It serves as both thermal and electrical ground path; relying solely on the pad without additional GND pin connections violates layout guidelines and degrades thermal performance.

How does the EN pin behave during power-up if left floating?

The EN pin has no internal pull-up or pull-down; floating behavior is undefined and may cause erratic startup or latch-up. Per datasheet recommendation, unused EN pins must be tied directly to IN to ensure reliable turn-on. A 10kΩ pull-up to IN is acceptable but adds unnecessary leakage risk.