Diodes Incorporated AP7365-12YRG-13

Overview

AP7365-12YRG-13 from Diodes Incorporated is a fixed-output 1.2V, 600mA low-dropout linear regulator in SOT89-3 package with 35μA quiescent current, 300mV dropout at full load, and integrated enable control. It delivers stable core/I/O power for FPGA and DSP subsystems in battery-powered notebooks and servers under fast transient loads.

For engineers reviewing the AP7365-12YRG-13 datasheet, AP7365-12YRG-13 pinout, AP7365-12YRG-13 application, or AP7365-12YRG-13 equivalent, key selection criteria include dropout voltage at 600mA, PSRR at 1kHz, thermal shutdown threshold, EN logic thresholds, and compatibility with 1μF ceramic output capacitors.

Technical Context

The AP7365-12YRG-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.

It integrates active current limiting (1.4A typical), short-circuit protection (240mA clamping), and thermal shutdown (145°C trip, 15°C hysteresis). The EN pin accepts 1.4V VIH and tolerates 0.4V VIL, supporting direct microcontroller GPIO control without level shifting.

Key Specifications

Pinout & Package

SOT89-3 (YR package) with exposed thermal pad on pin 3 (IN), providing 133°C/W θJA on FR-4 board. Pin 1 = OUT, Pin 2 = GND, Pin 3 = IN (thermal tab).

Key Features

Applications

Equivalent & Alternatives

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

Compared with MCP1700T-1202E/TT and TPS7A0512PDQNR, the AP7365-12YRG-13 uniquely combines 600mA capability, 35μA IQ, integrated EN, and full fault protection in a thermally robust SOT89-3 package-making it the only drop-in solution for 1.2V FPGA core supplies requiring both high current and long battery life.

Availability

AP7365-12YRG-13 is available at Aetrix Electronics and suitable for FPGA core power, DSP I/O regulation, and notebook PCH rail applications requiring stable component supply, long-term lifecycle support, and RoHS-compliant sourcing.

Supply support for AP7365-12YRG-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 AP7365 belongs to Diodes' high-performance LDO family designed specifically for portable and battery-powered systems demanding ultra-low quiescent current, fast transient response, and robust protection features.

FAQ

What is the minimum input voltage required for AP7365-12YRG-13 to maintain regulation at 600mA?

The AP7365-12YRG-13 requires VIN ≥ 1.5V to sustain 1.2V output at 600mA, based on its maximum dropout of 370mV (per datasheet Table 1, VOUT < 2.5V condition). At 2.0V input, it delivers full 600mA with 800mV headroom-well within safe operating limits and thermal constraints on standard PCB layouts.

Can AP7365-12YRG-13 operate without an external output capacitor?

No. The AP7365-12YRG-13 requires a minimum 1μF ceramic output capacitor connected between OUT and GND for stability, as confirmed in the Application Information section (page 8). Omitting this capacitor causes oscillation and unregulated output, regardless of load conditions or input capacitance.

Is the EN pin internally pulled up or down when left floating?

The EN pin has no internal pull-up or pull-down; it must be actively driven. Floating EN results in undefined operation-potentially causing erratic turn-on or latch-up. Per datasheet Electrical Characteristics, VIH = 1.4V min and VIL = 0.4V max, so tie to IN (for always-on) or drive with a GPIO capable of 1.4V logic high.

How does thermal performance differ between SOT89-Y and SOT89-YR packages?

Both SOT89-Y and SOT89-YR share identical thermal resistance: θJA = 133°C/W and θJC = 30°C/W (datasheet page 4). The "R" suffix denotes reversed pinout (IN/GND/OUT vs. OUT/GND/IN), not thermal enhancement-the thermal pad remains on pin 3 (IN) in both variants, ensuring identical heatsinking capability.