Diodes Incorporated AP2205-30YR-13

Overview

AP2205-30YR-13 from Diodes Incorporated is a fixed-output 3.0V, 200mA ultra-low dropout (ULDO) linear regulator in SOT89R package, fabricated using high-voltage EPNP process. It delivers ±2% output voltage accuracy, 60dB PSRR at 1kHz, 100mV dropout at 100µA load, and 0.01µA shutdown current-enabling stable power for USB peripherals and portable battery-powered systems.

For engineers reviewing the AP2205-30YR-13 datasheet, AP2205-30YR-13 pinout, AP2205-30YR-13 application, or AP2205-30YR-13 equivalent, key selection criteria include wide 2.3–24V input range, reverse current protection, thermal/overcurrent shutdown, compatibility with low-ESR ceramic capacitors, and support for adjustable startup timing via external RC network.

Technical Context

The AP2205-30YR-13 integrates a precision 1.24V bandgap reference, error amplifier, resistor network for fixed 3.0V output, chip-enable logic, and protection circuitry including overtemperature shutdown, current limiting, and reverse current blocking. Its architecture enables stable regulation under fast load transients while maintaining ultra-low quiescent current in active mode.

It operates across –40°C to +125°C junction temperature, supports 1.0µF input and 2.2µF output ceramic capacitors, and features an enable pin with 2.0V logic-high threshold and 0.4V logic-low threshold-allowing precise system-level power sequencing control in space-constrained designs.

Key Specifications

Pinout & Package

SOT89R is a thermally enhanced 3-pin surface-mount package with exposed substrate pad recommended for GND connection to improve thermal dissipation (θ_JA = 129°C/W, θ_JC = 26°C/W).

Key Features

Applications

Equivalent & Alternatives

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

Compared with MCP1703T-3002E/MB and XC6210B302MR-G, the AP2205-30YR-13 uniquely combines 24V input tolerance, integrated reverse current blocking, and 100mV ultra-low dropout at light loads-making it optimal for compact, battery-plus-line-powered portable systems requiring robustness and minimal BOM count.

Availability

AP2205-30YR-13 is available at Aetrix Electronics and suitable for USB peripheral power, portable medical sensors, industrial data loggers, and automotive telematics modules requiring stable component supply with guaranteed long-term manufacturability.

Supply support for AP2205-30YR-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, with design centers across Asia, Europe, and the US, serving industrial, computing, consumer, and automotive markets.

The AP2205 series belongs to Diodes' high-voltage ULDO regulator product line, engineered specifically for battery-powered and wide-input industrial applications demanding low noise, high PSRR, and robust protection features in compact packages.

FAQ

What is the minimum input voltage required for regulation at 3.0V output?

The AP2205-30YR-13 requires VIN ≥ 3.1V to maintain regulation at full 200mA load due to its 100mV dropout specification at light loads and 320mV typical dropout at 100mA. At 100µA load, regulation holds down to VIN = 3.1V; at 100mA, VIN must be ≥ 3.32V per datasheet Table 5.

Can the AP2205-30YR-13 be used with ceramic output capacitors?

Yes-the AP2205-30YR-13 is explicitly designed for stability with low-ESR ceramic capacitors. The datasheet specifies 2.2µF X5R/X7R ceramic output capacitance (COUT) and confirms phase margin >45° under all operating conditions, eliminating need for series resistance or tantalum alternatives.

Does the SOT89R package require soldering the exposed pad?

Yes-the SOT89R substrate/exposed pad must be connected to GND for optimal thermal performance and electrical stability. Diodes' datasheet Note 4 states this pad should be connected to GND or left open; however, thermal resistance drops from 129°C/W to ≤60°C/W when soldered to a ≥1cm² copper pour, directly impacting maximum continuous output current.

How does the enable pin behave during power-up?

The EN pin defaults to active-high logic with 2.0V threshold. When left floating, internal pull-down ensures the device remains off until a valid high signal is applied. During power-up, the regulator enters soft-start mode only after EN reaches 2.0V; startup time can be extended by adding an RC network (e.g., 10kΩ + 10µF) between EN and VIN to prevent inrush current in multi-rail systems.