Diodes Incorporated AP7365-39ERG-13

Overview

AP7365-39ERG-13 from Diodes Incorporated is a fixed-output 3.9V, 600mA low-dropout linear regulator in SOT223-ER package with 35μA quiescent current, 300mV dropout at full load, and integrated enable, thermal shutdown, and current-limit protection. It delivers stable core/I/O power to FPGA, DSP, and portable consumer electronics operating from 2V–6V input rails.

For engineers reviewing the AP7365-39ERG-13 datasheet, AP7365-39ERG-13 pinout, AP7365-39ERG-13 application, or AP7365-39ERG-13 equivalent, key selection criteria include dropout voltage at 600mA, PSRR at 1kHz, start-up time, thermal resistance (θ_JA = 142°C/W), and compatibility with 1μF ceramic output capacitors.

Technical Context

The AP7365-39ERG-13 implements a PMOS pass transistor architecture enabling low dropout (300mV @ 600mA) and ultra-low quiescent current (35μA typ). Its internal 0.8V bandgap reference and error amplifier regulate output precisely across –40°C to +85°C ambient.

Enable control is active-high with VIH ≥ 1.4V and VIL ≤ 0.4V; thermal shutdown triggers at +145°C with +15°C hysteresis. Protection includes foldback current limiting (1.4A typ) and short-circuit clamping (240mA typ).

Key Specifications

Pinout & Package

SOT223-ER package with exposed thermal pad (pin 3 = GND, pin 2 = OUT, pin 1 = IN); thermally enhanced for high-current LDO operation in space-constrained industrial PCBs.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MCP1700-3302E/TO and XC6206P392MR-G, the AP7365-39ERG-13 uniquely combines 600mA drive, 3.9V output, enable control, and full protection in an industrial-qualified SOT223 package-making it the sole fit for FPGA I/O and DSP core supplies demanding both headroom and robustness.

Availability

AP7365-39ERG-13 is available at Aetrix Electronics and suitable for FPGA I/O power, DSP core supply, and portable medical sensors requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.

Supply support for AP7365-39ERG-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 belongs to Diodes' precision LDO portfolio designed for battery-powered and space-constrained systems requiring ultra-low IQ, fast transient response, and integrated protection-targeting portable computing, industrial IoT, and medical electronics.

FAQ

What is the minimum input voltage required for AP7365-39ERG-13 to maintain regulation?

The AP7365-39ERG-13 requires VIN ≥ VOUT + VDROPOUT = 3.9V + 0.3V = 4.2V to sustain 600mA output current. At lighter loads, regulation holds down to VIN = 4.0V (typical dropout 100mV at 100mA). Below 4.0V, output voltage drops linearly per the dropout curve on page 7 of DS32260 Rev. 11-3.

Can AP7365-39ERG-13 operate without an output capacitor?

No. The AP7365-39ERG-13 requires a minimum 1μF ceramic output capacitor (ESR >15mΩ) for stability, as confirmed in Section 8 of the datasheet. Omitting it causes oscillation and voltage overshoot during load transients; larger values (e.g., 4.7μF) further improve line/load regulation but are not mandatory.

How does the EN pin behave during power-up sequences?

The EN pin must rise above 1.4V (VIH) to enable regulation; below 0.4V (VIL), the device shuts down with <1.0μA shutdown current. During slow-rising input rails, EN should be tied to VIN only after VIN exceeds 2.0V to prevent brown-out glitches. For controlled sequencing, drive EN from a dedicated supervisor IC with precise threshold timing.

Is AP7365-39ERG-13 qualified for automotive applications?

No. The AP7365-39ERG-13 is not AEC-Q100 qualified. Diodes states in the datasheet that automotive-grade variants require specific change control, PPAP capability, and IATF 16949 manufacturing-none of which apply to this part. Use only in industrial, consumer, or medical applications within its –40°C to +85°C ambient rating.