Diodes Incorporated AP7365-18ERG-13

Overview

AP7365-18ERG-13 from Diodes Incorporated is a fixed-output 1.8V, 600mA low-dropout linear regulator in SOT223-3 (ER package) with 35μA quiescent current, 300mV dropout at full load, and integrated enable control. It delivers stable core/I/O power to FPGA, DSP, and portable electronics under 2V–6V input, supporting fast transient response and thermal shutdown protection.

For engineers reviewing the AP7365-18ERG-13 datasheet, AP7365-18ERG-13 pinout, AP7365-18ERG-13 application, or AP7365-18ERG-13 equivalent, key selection criteria include dropout voltage at 600mA, EN logic thresholds (VIH ≥1.4V, VIL ≤0.4V), output accuracy (±2%), PSRR (65dB @1kHz), and thermal resistance (θJA = 142°C/W).

Technical Context

The AP7365-18ERG-13 implements a PMOS pass transistor architecture enabling low dropout (300mV @600mA, VOUT ≥2.5V) and ultra-low quiescent current (35μA typ). Its internal 0.8V bandgap reference and error amplifier regulate output with ±2% accuracy across –40°C to +85°C ambient.

It integrates active protection circuitry: current limit (~1.4A), short-circuit clamp (~240mA), and thermal shutdown triggered at +145°C with +15°C hysteresis. The EN pin provides logic-level on/off control with VIH ≥1.4V and VIL ≤0.4V, compatible with standard CMOS outputs.

Key Specifications

Pinout & Package

SOT223-3 (ER package) with exposed thermal pad (pin 3 = GND/TAB); compact 3-pin surface-mount footprint optimized for thermal dissipation in space-constrained PCBs.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MCP1700-1802E/TO and XC6210B182MR-G, the AP7365-18ERG-13 uniquely balances 600mA drive, 35μA IQ, integrated EN, and full protection (current limit, short-circuit, thermal shutdown) in a thermally enhanced SOT223 package-making it optimal for mid-power embedded systems requiring reliability and design simplicity.

Availability

AP7365-18ERG-13 is available at Aetrix Electronics and suitable for FPGA power delivery, DSP I/O regulation, and portable medical sensor nodes requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.

Supply support for AP7365-18ERG-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 power management, signal integrity, and connectivity applications.

The AP7365 series belongs to Diodes' high-performance LDO portfolio, engineered for battery-powered and space-constrained systems demanding low dropout, ultra-low IQ, and fast transient response in consumer, computing, and industrial markets.

FAQ

What is the minimum input voltage required for AP7365-18ERG-13 to maintain 1.8V output at 600mA?

The minimum input voltage is calculated as VOUT + VDROPOUT = 1.8V + 0.3V = 2.1V. Per datasheet specifications, dropout is 300mV at 600mA for VOUT ≥2.5V; for 1.8V output, typical dropout is 370mV (max 600mV), so VIN must be ≥2.17V (typical) to guarantee regulation at full load across temperature and process variation.

Can AP7365-18ERG-13 operate without an output capacitor?

No. The device requires a minimum 1μF ceramic output capacitor with ESR >15mΩ for stability, as confirmed in the Application Information section. Omitting the output capacitor causes oscillation and unregulated output, risking downstream circuit malfunction. Larger capacitance improves transient response but does not replace the minimum requirement.

How is thermal performance affected if the SOT223-3 thermal pad is not soldered to a copper plane?

Without a thermal pad connection to a ≥1cm² copper pour, θJA degrades significantly beyond the rated 142°C/W. This reduces maximum allowable power dissipation (PD = (VIN–VOUT)×IOUT) and increases risk of thermal shutdown at currents well below 600mA-especially at VIN >4V or ambient >60°C. Proper pad soldering is mandatory for rated performance.

Is AP7365-18ERG-13 qualified for automotive applications per AEC-Q100?

No. The AP7365-18ERG-13 is not AEC-Q100 qualified. Diodes Incorporated explicitly states that automotive-grade versions require separate qualification, PPAP capability, and IATF 16949 manufacturing-available only upon direct request and custom part numbering. This variant is intended for commercial/industrial use.