Diodes Incorporated AP7365-12EG-13

Overview

AP7365-12EG-13 from Diodes Incorporated is a fixed-output 1.2V, 600mA low-dropout linear regulator with 35μA quiescent current, 300mV dropout at full load, and enable control. It operates from 2V to 6V input, delivers ±2% output accuracy across –40°C to +85°C, and stabilizes with a single 1μF ceramic output capacitor. It is used in FPGA I/O power rails where fast transient response and ultra-low standby current are critical.

For engineers reviewing the AP7365-12EG-13 datasheet, AP7365-12EG-13 pinout, AP7365-12EG-13 application, or AP7365-12EG-13 equivalent, key selection criteria include dropout voltage under 600mA load, EN logic thresholds (VIH ≥ 1.4V, VIL ≤ 0.4V), thermal shutdown threshold (+145°C), PSRR of 65dB at 1kHz, and compatibility with low-ESR ceramic capacitors.

Technical Context

The AP7365-12EG-13 implements a PMOS pass transistor architecture enabling low dropout and high PSRR. Its internal 0.8V bandgap reference feeds an error amplifier that regulates output via feedback from the fixed 1.2V divider network - no external resistors required.

It integrates active current limiting (1.4A typical), short-circuit protection (240mA clamp), and thermal shutdown with 15°C hysteresis. The EN pin directly controls gate driver activation, enabling fast 200μs start-up without compromising quiescent current.

Key Specifications

Pinout & Package

AP7365-12EG-13 is supplied in SOT223 package (E variant) with exposed thermal pad (pin 3). Pin 1 is OUT, pin 2 is GND, pin 3 is IN (connected to thermal tab). This thermally enhanced package achieves θ_JA = 142°C/W on standard FR-4 PCB.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar low-dropout linear regulator applications.

Compared with AP7361-12YG-13 and MCP1700-1202E/TO, the AP7365-12EG-13 uniquely balances 600mA capability, 300mV dropout, and 35μA IQ - making it the only viable option for thermally constrained, high-current 1.2V FPGA or DSP power domains.

Availability

AP7365-12EG-13 is available at Aetrix Electronics and suitable for FPGA I/O power, DSP core supply, portable medical sensor nodes, and industrial PLC I/O modules requiring stable component supply across extended temperature and long product lifecycles.

Supply support for AP7365-12EG-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 solutions for power management, signal integrity, and connectivity applications.

The AP7365 series belongs to Diodes' precision LDO portfolio, engineered specifically for high-efficiency, low-noise power delivery in battery-powered and thermally sensitive embedded systems.

FAQ

What is the maximum input voltage for AP7365-12EG-13?

The absolute maximum input voltage is 6.5V, but the recommended operating range is 2V to 6V. Exceeding 6V risks permanent damage due to internal overvoltage stress on the PMOS pass element and bandgap circuitry, even with brief transients.

Does AP7365-12EG-13 require an external enable circuit?

No. The AP7365-12EG-13 uses the SOT223-E package configuration, which omits the EN pin entirely. The device is permanently enabled and begins regulating as soon as VIN exceeds 2V and stabilizes - no external pull-up or control logic is needed.

Can AP7365-12EG-13 be used with ceramic capacitors smaller than 1μF?

No. Stability is guaranteed only with ≥1μF ceramic output capacitance having ESR >15mΩ. Using smaller values (e.g., 0.47μF) may cause oscillation or excessive overshoot during load transients, as confirmed by the manufacturer's stability region plots in DS32260 Rev. 11.

What thermal derating applies to AP7365-12EG-13 at 85°C ambient?

At TA = +85°C, maximum continuous output current drops to ~420mA due to thermal limits. This is calculated using PD = (VIN − VOUT) × IOUT, θ_JA = 142°C/W, and TJ(max) = 145°C - assuming VIN = 4.3V and no heatsink. Derating curves are provided in Figure 17 of the datasheet.