Diodes Incorporated AP2213D-3.3TRE1

Overview

AP2213D-3.3TRE1 from Diodes Incorporated is a fixed 3.3V, 500mA low-noise LDO regulator with 350mV dropout at full load, ±1% output accuracy, and 75dB PSRR at 100Hz. It features logic-compatible enable control, 1µA shutdown current, and reversed current protection-designed for noise-sensitive RF electronics and battery-powered portable devices.

For engineers reviewing the AP2213D-3.3TRE1 datasheet, AP2213D-3.3TRE1 pinout, AP2213D-3.3TRE1 application, or AP2213D-3.3TRE1 equivalent, key selection criteria include dropout voltage under 500mA load, thermal performance in TO-252-2 (3), BYP capacitor integration for noise reduction, and compatibility with 100pF bypass networks in compact handheld designs.

Technical Context

The AP2213D-3.3TRE1 employs a bandgap-referenced linear regulation architecture with internal current limiting and thermal shutdown circuitry. Its BYP terminal connects to an internal voltage reference node, enabling 260nV/√Hz output noise suppression when a 100pF capacitor is placed to GND.

Enable logic operates over 0–18V input range with TTL/CMOS compatibility: VIH ≥ 2.0V enables regulation; VIL ≤ 0.4V forces shutdown. Ground pin current scales with load (11mA typical at 500mA output), directly impacting system quiescent power budget in always-on applications.

Key Specifications

Pinout & Package

AP2213D-3.3TRE1 is supplied in the TO-252-2 (3) surface-mount package (also known as DPAK), featuring exposed thermal pad for enhanced heat dissipation. Pin 1 = VIN, Pin 2 = VOUT, Pin 3 = GND.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MCP1703T-3302E/MB and TLS850B2TE/VX, AP2213D-3.3TRE1 uniquely balances ultra-low shutdown current, 500mA capability, and BYP-enabled noise reduction-making it optimal for battery-constrained, noise-sensitive RF and portable computing applications where automotive qualification is unnecessary.

Availability

AP2213D-3.3TRE1 is available at Aetrix Electronics and suitable for portable medical sensors, Wi-Fi 6 IoT modules, and industrial HMI displays requiring stable component supply with lead-free, RoHS 3-compliant packaging.

Supply support for AP2213D-3.3TRE1 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 AP2213 series belongs to Diodes' high-performance LDO portfolio, engineered specifically for noise-critical, battery-operated systems demanding low dropout, precision output, and robust protection features.

FAQ

What is the minimum input voltage required for AP2213D-3.3TRE1 to regulate properly?

The minimum input voltage is 3.65V, calculated as VOUT + VDROP = 3.3V + 350mV. At 500mA load and +25°C, the device maintains regulation down to this differential. For reliable PSRR and thermal margin, Diodes recommends VIN ≥ 4.3V (VOUT + 1V) per datasheet Section 4.

Can the BYP pin be left unconnected in AP2213D-3.3TRE1?

Yes-the BYP terminal is optional. Leaving it open disables the internal reference bypass, increasing output noise to ~1.2µV RMS but improving startup time and widening the stable ESR range for output capacitors. Use only when noise is secondary to fast wake-up response.

Does AP2213D-3.3TRE1 include reverse polarity protection?

No-it provides reversed current protection (blocking backflow from VOUT to VIN) but not reverse polarity protection. External input diode or MOSFET is required if VIN may be applied with incorrect polarity. This feature prevents damage during board-level hot-plug or battery insertion errors.

Is thermal derating required for continuous 500mA operation in TO-252-2 (3) package?

Yes-using θJA = 90°C/W, PD = (VIN − 3.3V) × 0.5A + VIN × 0.011A. At VIN = 5V and TA = +70°C, TJ ≈ 115°C, within safe limit. Above +85°C ambient or VIN > 6V, output current must be reduced per Figure "Power Dissipation vs. Ambient Temperature" in DS42665 Rev. 3-2, page 12.