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Home > Products > Integrated Circuits (ICs) > Power Management (PMIC) > Voltage Regulators - Linear, Low Drop Out (LDO) Regulators

Diodes Incorporated AP2205-25YR-13

Name: AP2205-25YR-13
Brand: Diodes Incorporated
SKU: AP2205-25YR-13
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: AP2205-25YR-13

Manufacturer:: Diodes Incorporated

Category:: Voltage Regulators - Linear, Low Drop Out (LDO) Regulators

Package:: TO-243AA

Datasheet:: AP2205-25YR-13.pdf

Description:: IC REG LINEAR 2.5V 250MA SOT89-3

Quantity:: RFQ Add To RFQ list

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Inventory:2,490

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Product details

Overview

AP2205-25YR-13 from Diodes Incorporated is a fixed-output 2.5V ultra-low dropout (ULDO) linear regulator in SOT89R package, delivering up to 200mA output current with 100mV dropout at 100µA load. It features 2.3V–24V input range, ±2% output voltage accuracy, 60dB PSRR at 1kHz, and integrated thermal shutdown, overcurrent, and reverse-current protection-designed for USB-powered portable devices and industrial sensors requiring stable low-noise bias.

For engineers reviewing the AP2205-25YR-13 datasheet, AP2205-25YR-13 pinout, AP2205-25YR-13 application, or AP2205-25YR-13 equivalent, key selection criteria include dropout performance under light-load conditions, enable-pin logic thresholds (EN "High" ≥2.0V), ground current scalability (36µA @ 100µA I_OUT), and compatibility with ceramic output capacitors ≥2.2µF.

Technical Context

The AP2205-25YR-13 implements an EPNP-based regulation architecture with internal 1.24V reference, error amplifier, and resistor network preset for 2.5V output. Its enable circuit supports active-high logic control with 3µA input leakage and 0.4V "Low" threshold, enabling precise power sequencing in multi-rail systems.

Thermal protection activates at +150°C junction temperature, and the device maintains ±100ppm/°C output voltage drift across –40°C to +125°C. Dropout voltage remains ≤320mV at 100mA load and V_IN = V_OUT + 1V, supporting operation down to 2.8V input for 2.5V output.

Key Specifications

Parameter	Value and Actual Design Meaning
Output Voltage	Fixed 2.5V ±2% - ensures stable MCU core or sensor analog supply without external feedback components
Input Voltage Range	2.3V to 24V - supports direct connection to Li-ion batteries, 12V industrial rails, and USB-C PD sources
Max Output Current	200mA at V_OUT > 1.8V - sufficient for powering microcontrollers, RF transceivers, and precision ADCs
Dropout Voltage	100mV @ 100µA - enables regulation from 2.6V input, critical for battery end-of-life operation
PSRR	60dB @ 1kHz - suppresses switching noise from adjacent DC-DC converters in mixed-signal PCBs
Quiescent Current	36µA @ 100µA load - extends battery life in always-on sensor nodes and wearables
Enable Threshold	V_EN(HI) ≥ 2.0V, V_EN(LO) ≤ 0.4V - compatible with 1.8V/3.3V GPIO without level-shifting

Pinout & Package

SOT89R is a 3-pin thermally enhanced plastic package with exposed substrate pad (pin 2), rated at θ_JA = 129°C/W on 2-layer FR-4. The substrate must be connected to GND for optimal thermal and EMI performance.

Pin/Terminal	Circuit Role	Design Meaning
1	VIN	Main input supply connection; accepts 2.3–24V with transient tolerance up to 36V
2	GND	Power ground and thermal pad anchor; connects to PCB ground plane for heat dissipation
3	VOUT	Regulated 2.5V output; requires ≥2.2µF ceramic capacitor for stability and PSRR optimization

Key Features

Feature	Design Value
Ultra-low quiescent current	36µA at light load - reduces standby power in battery-backed real-time clocks and IoT edge nodes
Reverse current protection	Prevents backfeed from VOUT to VIN during shutdown - eliminates need for external blocking diode
Low-noise output	30µV_RMS (10Hz–100kHz) - suitable for powering high-resolution ADCs and RF synthesizers
Thermal shutdown	Activates at +150°C junction temperature with automatic recovery - protects against sustained overload or poor heatsinking
Lead-free & RoHS-compliant	Fully compliant with EU RoHS 2015/863/EU and halogen-free (<900ppm Br+Cl, <1000ppm Sb) - meets automotive and industrial environmental requirements

Applications

USB-Powered Sensor Node

Industrial PLC I/O Module

Use Scenario: A battery-backed environmental sensor node powered via USB-C port with variable input (5V–9V) and strict 2.5V analog rail requirement.

IC Role / Device Role / Timing Role: Primary LDO providing clean 2.5V supply to 24-bit sigma-delta ADC and low-power BLE radio.

Use Value: 60dB PSRR rejects USB switcher ripple; 100mV dropout allows full regulation until battery drops to 2.6V.

Use Scenario: DIN-rail mounted PLC module accepting 24V DC field power with isolated 2.5V logic supply for digital input conditioning circuits.

IC Role / Device Role / Timing Role: Secondary regulator deriving 2.5V from internal 5V rail, enabling precise voltage reference for optocoupler input thresholds.

Use Value: Wide 2.3–24V input accommodates brownout and surge conditions; thermal shutdown prevents latch-up during ambient >85°C operation.

Portable Medical Monitor

Automotive Cabin Controller

Use Scenario: Handheld pulse oximeter using single-cell Li-ion (3.0–4.2V) with analog front-end requiring ultra-low-noise 2.5V bias.

IC Role / Device Role / Timing Role: Low-noise LDO supplying reference voltage to transimpedance amplifier and ADC driver stage.

Use Value: 30µV_RMS noise floor preserves SNR in weak photodiode signal path; reverse-current protection avoids discharge during sleep mode.

Use Scenario: In-vehicle infotainment sub-module requiring 2.5V for CAN transceiver logic and touch controller interface.

IC Role / Device Role / Timing Role: Point-of-load regulator converting 5V system rail to 2.5V for mixed-signal ICs with enable-controlled power sequencing.

Use Value: EN pin with 2.0V threshold integrates directly with 3.3V microcontroller GPIO; ±2% accuracy ensures CAN bus timing margin compliance.

Equivalent & Alternatives

The following parts are listed as comparable options for similar ultra-low dropout linear regulator applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
MCP1703T-2502E/MB	250mA max output, 350mV dropout @ 250mA, no reverse-current protection	Lacks reverse-current blocking; requires external diode in battery-backup designs	Select when higher output current is needed and reverse-current risk is mitigated externally
TNIV5025024R	200mA max, 120mV dropout @ 100µA, 45dB PSRR @ 1kHz, no enable pin	Fixed ON/OFF control only; unsuitable for dynamic power gating or sequencing	Choose when enable functionality is unnecessary and lower cost is prioritized over PSRR

Compared with MCP1703T-2502E/MB and TNIV5025024R, the AP2205-25YR-13 uniquely combines reverse-current protection, 60dB PSRR, and active-high enable in a thermally optimized SOT89R package-making it optimal for space-constrained, battery-sensitive, and noise-critical applications where all three features are required simultaneously.

Availability

AP2205-25YR-13 is available at Aetrix Electronics and suitable for USB-powered sensor nodes, portable medical monitors, industrial PLC I/O modules, and automotive cabin controllers requiring stable component supply with guaranteed long-term availability.

Supply support for AP2205-25YR-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 manufacturer specializing in discrete, analog, and mixed-signal solutions, with design centers across Asia, Europe, and the US, serving industrial, computing, communications, and consumer markets.

The AP2205 series belongs to Diodes' high-voltage ULDO regulator product line, engineered specifically for wide-input, low-noise, battery-conscious applications in portable and harsh-environment electronics.

FAQ

What is the minimum input voltage required for regulation at 2.5V output?

The AP2205-25YR-13 requires VIN ≥ 2.6V to maintain regulation at 2.5V output under light load (100µA), based on its 100mV dropout specification. At 100mA load, minimum VIN rises to 2.82V per the 320mV typical dropout value. Operation below 2.3V input is not supported per absolute maximum ratings.

Can the AP2205-25YR-13 be used with a 1µF ceramic input capacitor?

Yes-the datasheet specifies CIN = 1.0µF ceramic as standard for stability testing. A 1µF X5R/X7R 0603 or 0805 capacitor placed within 2mm of VIN and GND pins meets layout requirements. Larger values improve transient response but are not required for basic operation.

Does the SOT89R package require soldering the exposed pad to PCB ground?

Yes-the substrate/exposed pad (pin 2) must be connected to GND for both thermal performance and electrical integrity. Diodes' datasheet explicitly states this connection is mandatory to achieve the rated θ_JA = 129°C/W and ensure proper ESD and noise immunity.

Is the AP2205-25YR-13 qualified for automotive applications per AEC-Q100?

No-the AP2205-25YR-13 is not AEC-Q100 qualified. Diodes offers automotive-grade variants (e.g., AP2205Q series) with PPAP capability and IATF 16949 manufacturing, but this specific part number is intended for industrial and commercial use only.

AP2205-25YR-13 Specifications

Product attributes: Attribute value

Manufacturer:: Diodes Incorporated

Series:: -

Package/Case:: TO-243AA

Packaging:: Tape & Reel (TR)

Product Status:: Active

Output Configuration:: Positive

Output Type:: Fixed

Number of Regulators:: 1

Voltage - Input (Max):: 24V

Voltage - Output (Min/Fixed):: 2.5V

Voltage - Output (Max):: -

Voltage Dropout (Max):: 0.5V @ 150mA

Current - Output:: 250mA

Current - Quiescent (Iq):: -

Current - Supply (Max):: -

PSRR:: 60dB (100Hz ~ 1kHz)

Control Features:: -

Protection Features:: Over Current, Over Temperature, Reverse Polarity

Operating Temperature:: -40°C ~ 125°C (TJ)

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: SOT-89-3

AP2205-25YR-13 FAQ

1.How can I place an order for AP2205-25YR-13 through Aetrix?

Please submit a Request for Quotation (RFQ) for AP2205-25YR-13 on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.

2.Are the price and stock information for AP2205-25YR-13 reliable?

The price and inventory of AP2205-25YR-13 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AP2205-25YR-13 is usually 5 days.

3.What payment methods are accepted for AP2205-25YR-13?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AP2205-25YR-13 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for AP2205-25YR-13?

AP2205-25YR-13 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your AP2205-25YR-13 order is processed, you will receive an email with the shipment details and tracking number.

Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.

5.How can I obtain technical support or documentation for AP2205-25YR-13?

For technical support, including AP2205-25YR-13 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AP2205-25YR-13 requirements.

6.How does Aetrix verify that AP2205-25YR-13 is sourced from the original manufacturer or authorized distributors?

All AP2205-25YR-13 products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that AP2205-25YR-13 meets industry standards.

7.What is the process for return or replacement of AP2205-25YR-13?

All AP2205-25YR-13 units undergo pre-shipment inspection (PSI). If there is an issue with AP2205-25YR-13, returns or replacements are accepted under the following conditions:

1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.

2.The issue is reported within 90 days of delivery.

3.The AP2205-25YR-13 part is unused and in its original packaging.

Return procedure for AP2205-25YR-13:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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