Diodes Incorporated AP2213D-2.5TRG1

Overview

AP2213D-2.5TRG1 from Diodes Incorporated is a fixed 2.5V, 500mA low-noise LDO regulator with 350mV dropout at full load, 1µA shutdown current, 75dB PSRR at 100Hz, and ±1% output accuracy. It delivers stable power to noise-sensitive RF circuitry and battery-powered portable electronics requiring tight voltage regulation and minimal quiescent consumption.

For engineers reviewing the AP2213D-2.5TRG1 datasheet, AP2213D-2.5TRG1 pinout, AP2213D-2.5TRG1 application, or AP2213D-2.5TRG1 equivalent, key selection criteria include dropout performance under 500mA load, thermal resistance in TO-252-2 (3), BYP capacitor integration for noise reduction, and logic-compatible enable timing behavior across -40°C to +125°C.

Technical Context

The AP2213D-2.5TRG1 employs a bandgap-referenced CMOS pass transistor architecture with internal current limiting, thermal shutdown, and reverse-current protection. Its enable input accepts TTL/CMOS logic levels (VIH ≥ 2.0V, VIL ≤ 0.4V) and draws only 5–20µA active current.

Low-noise operation relies on an external 100pF bypass capacitor connected between BYP and GND, which stabilizes the internal reference and reduces output noise to 260µV_RMS. The device maintains ±1% output accuracy over line (2.5V–18V input), load (0.1mA–500mA), and temperature (-40°C to +125°C) variations.

Key Specifications

Pinout & Package

AP2213D-2.5TRG1 is packaged in TO-252-2 (3) (also known as DPAK), featuring exposed thermal pad for enhanced heat dissipation (θ_JA = 90°C/W, θ_JC = 20°C/W). The 3-pin configuration supports compact PCB layout with minimal external components.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MCP1700T-2502E/TT and TLS850B2TE/V1, AP2213D-2.5TRG1 uniquely balances 500mA capability, 260µV_RMS noise, and logic-enable flexibility-making it optimal for portable RF and industrial sensing where noise, current, and control granularity intersect.

Availability

AP2213D-2.5TRG1 is available at Aetrix Electronics and suitable for RF front-end power, portable MCU core supply, industrial sensor signal chains, and USB peripheral interface designs requiring stable component supply with full traceability and long-term lifecycle support.

Supply support for AP2213D-2.5TRG1 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 battery-powered and noise-critical systems where low dropout, ultra-low standby current, and PSRR stability are non-negotiable design requirements.

FAQ

What is the minimum input voltage required for AP2213D-2.5TRG1 to maintain regulation?

The absolute minimum input is 2.85V (2.5V + 350mV dropout), but Diodes recommends VIN ≥ 3.5V (VOUT + 1V) to ensure full PSRR performance and avoid degradation near dropout. Below 3.5V, ripple rejection drops sharply, risking noise coupling into sensitive loads.

Can the BYP pin be left unconnected?

Yes-BYP may be left open if output noise is not critical and fast startup is required. However, omitting the 100pF capacitor increases output noise to ~800µV_RMS and reduces PSRR by 15–20dB below 10kHz, which compromises RF and precision analog performance.

Is AP2213D-2.5TRG1 compatible with ceramic output capacitors?

Yes-it is fully stable with 2.2µF X5R/X7R ceramic capacitors when paired with the 100pF BYP capacitor. The datasheet confirms ESR stability down to 5mΩ, eliminating need for higher-ESR tantalum or aluminum electrolytic types.

Does AP2213D-2.5TRG1 require an input capacitor?

Yes-a minimum 1.0µF ceramic capacitor between VIN and GND is mandatory per the datasheet to prevent oscillation and improve line transient response. Placement within 3mm of the VIN and GND pins is required to maintain stability under dynamic load conditions.