Diodes Incorporated AP2205-30W5-7

Overview

AP2205-30W5-7 from Diodes Incorporated is a fixed-output 3.0V, 200mA ultra-low dropout (ULDO) linear regulator in SOT25 package, fabricated using high-voltage EPNP process. It delivers ±2% output voltage accuracy, 100mV dropout at 100µA load, 60dB PSRR at 1kHz, and 36µA ground current at light load-enabling stable power for USB peripherals and portable battery-powered systems.

For engineers reviewing the AP2205-30W5-7 datasheet, AP2205-30W5-7 pinout, AP2205-30W5-7 application, or AP2205-30W5-7 equivalent, key selection considerations include input range (2.3–24V), thermal shutdown, reverse current protection, EN-controlled low-power shutdown mode, and compatibility with low-ESR ceramic capacitors.

Technical Context

The AP2205-30W5-7 integrates a precision 1.24V bandgap reference, error amplifier, resistor network for fixed 3.0V output, current-limit circuit, thermal shutdown (OTP), and enable-controlled shutdown with 1µA standby current. Its architecture supports operation down to 2.3V input while maintaining regulation up to 24V.

It features reverse current protection to prevent backfeed during shutdown, low-noise operation (30µVRMS, 10Hz–100kHz), and excellent line regulation (0.05%) and load regulation (0.5%)-making it suitable for noise-sensitive analog and mixed-signal rails where input-to-output differential is minimal.

Key Specifications

Pinout & Package

SOT25 (SC-74A) package: 5-pin surface-mount, 1.6mm × 2.9mm footprint, lead-free matte tin plating, moisture sensitivity level 1 per J-STD-020.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MCP1700T-3002E/MB and TLS850F3TLE, the AP2205-30W5-7 uniquely balances wide-input operation (2.3–24V), ultra-low dropout (100mV), reverse current blocking, and sub-40µA quiescent current-making it optimal for portable, industrial, and cost-sensitive automotive accessory designs where input voltage variability and battery longevity are critical.

Availability

AP2205-30W5-7 is available at Aetrix Electronics and suitable for USB peripheral power, industrial sensor nodes, portable medical monitors, and automotive infotainment accessories requiring stable component supply across extended temperature and input voltage ranges.

Supply support for AP2205-30W5-7 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 manufacturer of discrete semiconductors and analog ICs, specializing in high-reliability power management, signal integrity, and protection solutions for industrial, computing, and consumer markets.

The AP2205 series belongs to Diodes' wide-input ULDO regulator product line, designed specifically for battery-powered and multi-rail systems demanding high accuracy, low noise, and robust protection features across harsh input conditions.

FAQ

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

The AP2205-30W5-7 maintains regulation down to 2.3V input, enabling operation from partially discharged batteries. At 3.0V output, the minimum functional input is 3.1V (3.0V + 100mV dropout) for 100µA loads; heavier loads increase dropout-e.g., 320mV at 100mA-so design margin must account for worst-case current and temperature.

Can the AP2205-30W5-7 be used with ceramic output capacitors?

Yes-the AP2205-30W5-7 is explicitly optimized for low-ESR ceramic capacitors. A 2.2µF X5R or X7R ceramic capacitor with ESR below 100mΩ is recommended at the VOUT pin to ensure stability and transient response. Tantalum or aluminum electrolytic capacitors are unnecessary and not recommended due to higher ESR and reliability concerns.

Does the EN pin require a pull-up resistor?

No external pull-up is required. The EN pin has an internal pull-down; driving it high (≥2.0V) enables regulation, while leaving it unconnected or pulled low (≤0.4V) places the device in ultra-low-IQ shutdown (<1µA). For reliable power sequencing, connect EN directly to a controlled GPIO or supervisor output-no passive biasing needed.

Is thermal derating required in SOT25 package at full 200mA load?

Yes-under continuous 200mA load at +85°C ambient, the SOT25 package's θJA of 160°C/W causes ~3.2°C rise per 100mA, resulting in ~64°C junction rise. With 125°C max TJ, derating is necessary above ~85°C ambient. Use PCB copper pour under the exposed pad (Pin 2) and minimize trace resistance to improve heat dissipation and sustain full load in compact layouts.