Send an Inquiry

To receive a quote for your project, please fill in the following information, and we’ll get back to you promptly.

Submit Inventory List

Please fill in the following information, and we’ll get back to you promptly.

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

Diodes Incorporated AP2205-18YR-13

Name: AP2205-18YR-13
Brand: Diodes Incorporated
SKU: AP2205-18YR-13
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

Compare

Part No.:: AP2205-18YR-13

Manufacturer:: Diodes Incorporated

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

Package:: TO-243AA

Datasheet:: AP2205-18YR-13.pdf

Description:: IC REG LINEAR 1.8V 250MA SOT89-3

Quantity:: RFQ Add To RFQ list

Payment:

Shipping:

Inventory:1,079

Please send an inquiry. Send us your inquiry, and we will respond immediately.

Product details

Overview

AP2205-18YR-13 from Diodes Incorporated is a fixed-output 1.8V ultra-low dropout (ULDO) linear regulator in SOT89R package, delivering up to 200mA output current with 100mV dropout at 100µA load, 60dB PSRR at 1kHz, and ±100ppm/°C temperature coefficient-designed for battery-powered portable devices requiring stable low-voltage rail generation.

For engineers reviewing the AP2205-18YR-13 datasheet, AP2205-18YR-13 pinout, AP2205-18YR-13 application, or AP2205-18YR-13 equivalent, key selection criteria include input voltage range (2.3V–24V), quiescent current (36µA at 100µA load), thermal shutdown behavior, EN pin logic thresholds (2.0V high / 0.4V low), and compatibility with low-ESR ceramic capacitors.

Technical Context

The AP2205-18YR-13 integrates an EPNP-based pass transistor, precision 1.24V bandgap reference, error amplifier, and enable-controlled shutdown circuitry. Its architecture supports wide-input operation while maintaining tight output regulation across –40°C to +125°C junction temperature.

It implements reverse-current protection, overcurrent limiting, and thermal shutdown with hysteresis. The fixed 1.8V output version uses internal resistor network-no external feedback components required-and features adjustable startup time via external RC on EN pin.

Key Specifications

Parameter	Value and Actual Design Meaning
Output Voltage	Fixed 1.8V ±2% tolerance ensures stable core voltage for 1.8V logic ICs and low-power microcontrollers.
Input Voltage Range	2.3V to 24V enables direct use with single-cell Li-ion (2.7–4.2V), multi-cell alkaline, or industrial 12V/24V rails.
Dropout Voltage	100mV @ 100µA load allows regulation down to VIN = 1.9V-critical for extending battery runtime in deep-discharge conditions.
PSRR	60dB @ 1kHz suppresses switching noise from upstream DC/DC converters feeding the LDO input.
Quiescent Current	36µA @ 100µA load minimizes standby power loss in always-on subsystems like real-time clocks or sensor interfaces.
Thermal Shutdown	Activates at TJ ≈ +150°C with hysteresis, protecting against sustained overload or poor PCB heatsinking in confined enclosures.
Enable Threshold	EN "high" ≥2.0V and "low" ≤0.4V provides robust noise margin for GPIO-driven control in noisy embedded environments.

Pinout & Package

SOT89R is a thermally enhanced variant of SOT89 with exposed substrate pad intended for GND connection to improve heat dissipation (θ_JA = 129°C/W, θ_JC = 26°C/W). Pin numbering follows top-view orientation with pin 1 at lead edge.

Pin/Terminal	Circuit Role	Design Meaning
1	GND	Power ground reference and thermal path; substrate pad must be connected to PCB GND plane for optimal thermal performance.
2	VIN	Main input supply connection; requires 1.0µF ceramic capacitor placed within 5mm of pin for stability.
3	VOUT	Regulated 1.8V output; requires 2.2µF low-ESR ceramic capacitor at device output to maintain PSRR and transient response.
4	EN	Active-high enable input; pulls device into ultra-low I_STD = 1.0µA shutdown mode when driven ≤0.4V.
5	NC	No-connect terminal-internally unconnected and must remain floating or tied to GND per layout guidelines.

Key Features

Feature	Design Value
Ultra-low quiescent current	36µA at light load enables >1-year battery life in coin-cell–powered IoT sensors.
Reverse current protection	Prevents backfeed from VOUT to VIN during input brownout-eliminates need for external blocking diode.
Low-ESR capacitor compatibility	Stable with 2.2µF X5R/X7R ceramics, reducing BOM count and board area vs. tantalum alternatives.
Adjustable startup timing	RC network on EN pin allows controlled power-rail sequencing in multi-rail systems (e.g., FPGA core before I/O).
Overtemperature hysteresis	Shuts down at ~150°C and resumes only after cooling by ~20°C-prevents thermal cycling damage during sustained overload.

Applications

Wearable Health Monitor

Industrial Sensor Node

Use Scenario: Continuous ECG signal acquisition powered by CR2032 coin cell.

IC Role / Device Role / Timing Role: Provides clean 1.8V supply to analog front-end and ultra-low-power MCU, rejecting switching noise from BLE radio bursts.

Use Value: 36µA quiescent current extends battery life beyond 18 months; 60dB PSRR maintains ADC SNR >85dB under RF interference.

Use Scenario: Wireless temperature/humidity node deployed in factory HVAC ducts.

IC Role / Device Role / Timing Role: Regulates 1.8V rail for digital sensor interface and LoRa transceiver from 12V industrial bus via intermediate buck converter.

Use Value: 2.3V–24V input range accommodates buck output variation; thermal shutdown protects against enclosure overheating at 70°C ambient.

USB-Powered Peripheral

Automotive Body Control Module

Use Scenario: USB-C powered smart dock with HDMI, USB-A, and Ethernet ports.

IC Role / Device Role / Timing Role: Generates 1.8V for USB PHY termination and level-shifting logic from 5V USB bus.

Use Value: 100mV dropout ensures regulation even as USB port voltage sags to 4.75V under load; EN pin enables hot-plug detection and power sequencing.

Use Scenario: Interior lighting controller operating from vehicle battery (9–16V nominal).

IC Role / Device Role / Timing Role: Supplies 1.8V to CAN transceiver and microcontroller core in non-safety-critical sub-system.

Use Value: AEC-Q100 qualification support available; reverse-current protection prevents backfeed during battery jump-start events.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
MCP1700-1802E/TO	100nA quiescent current (vs. 36µA), but max 250mA output limited to V_IN ≤ 6V and no EN pin.	Better for ultra-long-life coin-cell designs; unsuitable for 12V/24V industrial inputs or enable-controlled sequencing.	Select MCP1700 only when input stays ≤6V and shutdown current <1µA is mandatory.
Torex XC6206P182MR-G	1.8V fixed, 200mA, but PSRR = 45dB @ 1kHz (vs. 60dB) and no reverse-current protection.	Lower noise rejection in mixed-signal systems; requires external diode for backfeed prevention in multi-supply systems.	Choose XC6206 where cost is critical and PSRR >55dB or reverse-current blocking is not required.

Compared with MCP1700-1802E/TO and XC6206P182MR-G, the AP2205-18YR-13 uniquely balances wide-input capability (2.3–24V), integrated enable control, reverse-current blocking, and 60dB PSRR-making it optimal for industrial and automotive auxiliary rails where input variability and system-level protection are design priorities.

Availability

AP2205-18YR-13 is available at Aetrix Electronics and suitable for battery-powered equipment, portable information appliances, industrial sensor nodes, and automotive body electronics requiring stable component supply with full traceability and long-term lifecycle support.

Supply support for AP2205-18YR-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 manufacturing certified to IATF 16949 and product definitions aligned to AEC-Q standards.

The AP2205 series belongs to Diodes' high-voltage ULDO regulator product line, engineered specifically for USB, portable, and industrial applications demanding wide input range, low noise, and robust protection features.

FAQ

What is the minimum input voltage required for regulation at 1.8V output?

The AP2205-18YR-13 requires VIN ≥ 2.3V to operate, but stable regulation at full 200mA load demands VIN ≥ VOUT + VDROP. With typical dropout of 320mV at 100mA, minimum functional VIN is 2.12V-however, datasheet specifies 2.3V as absolute minimum to guarantee all specifications across temperature and process variation.

Can the SOT89R package be soldered using standard reflow profiles?

Yes-the SOT89R package is rated Moisture Sensitivity Level 3 per J-STD-020 and supports standard Pb-free reflow profiles with peak temperature ≤260°C for 10 seconds. The exposed substrate pad must be soldered to a thermal pad on the PCB to achieve specified θ_JA = 129°C/W.

Does the AP2205-18YR-13 require an external capacitor on the ADJ pin?

No-the AP2205-18YR-13 is a fixed-output variant; pin 4 is NC (no connect), and pin 5 is unused. The ADJ pin exists only on the adjustable version (AP2205-W5-7), which uses external resistors to set VOUT. This part has internal feedback and needs no ADJ-related components.

How does the EN pin behave during power-up when VIN ramps slowly?

The EN pin has hysteresis: it asserts when VEN rises above 2.0V and de-asserts only when VEN falls below 0.4V. During slow VIN ramp, EN remains inactive until external control (e.g., MCU GPIO or RC delay circuit) drives it above threshold-preventing premature turn-on and output overshoot during undervoltage conditions.

AP2205-18YR-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):: 1.8V

Voltage - Output (Max):: -

Voltage Dropout (Max):: -

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

AP2205-18YR-13 FAQ

1.How can I place an order for AP2205-18YR-13 through Aetrix?

Please submit a Request for Quotation (RFQ) for AP2205-18YR-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 AP2205-18YR-13 reliable?

The price and inventory of AP2205-18YR-13 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AP2205-18YR-13 is usually 5 days.

3.What payment methods are accepted for AP2205-18YR-13?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AP2205-18YR-13 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for AP2205-18YR-13?

AP2205-18YR-13 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your AP2205-18YR-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 AP2205-18YR-13?

For technical support, including AP2205-18YR-13 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AP2205-18YR-13 requirements.

6.How does Aetrix verify that AP2205-18YR-13 is sourced from the original manufacturer or authorized distributors?

All AP2205-18YR-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 AP2205-18YR-13 meets industry standards.

7.What is the process for return or replacement of AP2205-18YR-13?

All AP2205-18YR-13 units undergo pre-shipment inspection (PSI). If there is an issue with AP2205-18YR-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 AP2205-18YR-13 part is unused and in its original packaging.

Return procedure for AP2205-18YR-13:

1.Submit a request within 90 days.

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

Tech Hub

2026-09-03 Logic Level Shifter: How to Connect 3.3V and 5V Logic Safely

A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.

2026-09-03 74HC595 vs TPIC6B595: Output Drive, Pinout, Current, and Load Selection

The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…

2026-09-01 74HC595 Pinout, Timing, Output Current, and Applications

The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…

2026-09-01 Latch vs Flip-Flop: Timing, Differences and Design Choices

A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…

2026-08-30 D Latch Circuit: Truth Table, Timing, ICs and Applications

A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …

2026-08-28 SR Latch Explained: NOR and NAND Circuits, Truth Tables, and Applications

An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…

2026-08-27 Latch Circuit: SR and D Latches, Truth Tables, Timing, and Applications

Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…

2026-08-21 What Is an LED Driver? Types, Circuits, Dimming, and Selection

An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…

2026-08-18 Operational Amplifier (Op Amp): Basics, Configurations, Feedback and Applications

Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…

2026-08-14 Jumper Cables: How to Use, Connect and Choose Them Safely

Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…