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

Diodes Incorporated AP2205-15Y-13

Name: AP2205-15Y-13
Brand: Diodes Incorporated
SKU: AP2205-15Y-13
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: AP2205-15Y-13

Manufacturer:: Diodes Incorporated

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

Package:: TO-243AA

Datasheet:: AP2205-15Y-13.pdf

Description:: IC REG LINEAR 1.5V 250MA SOT89-3

Quantity:: RFQ Add To RFQ list

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Product details

Overview

AP2205-15Y-13 from Diodes Incorporated is a fixed-output 1.5V ultra-low dropout (ULDO) linear regulator IC designed for space-constrained, battery-powered systems. It operates across a wide 2.3V–24V input range, delivers up to 200mA output current, achieves 100mV dropout at 100µA load, and maintains ±2% output voltage accuracy over temperature and line/load variations - enabling stable power for USB peripherals and portable instrumentation.

For engineers reviewing the AP2205-15Y-13 datasheet, AP2205-15Y-13 pinout, AP2205-15Y-13 application, or AP2205-15Y-13 equivalent, key selection criteria include its 1.5V fixed output, SOT89 package thermal performance (θ_JA = 129°C/W), enable-controlled ultra-low quiescent current (10nA shutdown), and compatibility with low-ESR ceramic capacitors without external compensation.

Technical Context

The AP2205-15Y-13 integrates a precision 1.24V bandgap reference, error amplifier, and current-limit protection within a high-voltage EPNP process. Its internal resistor network fixes V_OUT at 1.5V, eliminating external feedback components while preserving tight regulation (±0.5% load regulation, ±0.05% line regulation).

It features active thermal shutdown, reverse-current protection, and an enable input that reduces ground current to 10nA in shutdown mode. The device supports startup time adjustment via external RC on the EN pin and exhibits 60dB PSRR at 1kHz - critical for noise-sensitive analog and RF subsystems powered from noisy DC sources.

Key Specifications

Parameter	Value and Actual Design Meaning
Output Voltage	Fixed 1.5V ±2% - eliminates need for external resistive divider and ensures predictable rail generation for low-voltage logic and sensors.
Input Voltage Range	2.3V to 24V - supports direct connection to 3.3V, 5V, 12V, and 24V supply rails without pre-regulation.
Max Output Current	200mA at V_OUT > 1.8V; 150mA at V_OUT ≤ 1.8V - sufficient for microcontrollers, PMICs, and sensor interfaces in portable designs.
Dropout Voltage	100mV @ 100µA; 320mV @ 100mA - enables operation with minimal headroom, extending battery runtime in coin-cell and Li-ion applications.
Quiescent Current	36µA @ 100µA load; 1.0µA in shutdown - minimizes standby power loss in always-on IoT endpoints and wearables.
PSRR	60dB @ 1kHz - suppresses switching noise from upstream DC/DC converters feeding sensitive analog circuitry.
Thermal Resistance	θ_JA = 129°C/W (SOT89) - allows 200mA operation up to +85°C ambient with standard PCB copper area, no heatsink required.

Pinout & Package

The AP2205-15Y-13 is housed in a thermally enhanced SOT89 package with exposed pad (pin 2), rated for 129°C/W junction-to-ambient thermal resistance. The substrate pad must be connected to GND for optimal thermal and electrical performance.

Pin/Terminal	Circuit Role	Design Meaning
1	VIN	Main input supply terminal; accepts 2.3V–24V; requires 1.0µF ceramic input capacitor for stability.
2	GND	Ground reference and thermal pad connection point; must be soldered to large PCB copper pour for heat dissipation.
3	VOUT	Regulated 1.5V output; requires 2.2µF ceramic output capacitor; supports low-ESR ceramics without series resistance.

Key Features

Feature	Design Value
Wide Input Range Support	2.3V–24V operation enables single-regulator compatibility across multiple system rails and battery chemistries (Li-ion, NiMH, alkaline).
Ultra-Low Dropout	100mV dropout at light load preserves usable battery capacity down to ~1.6V, extending runtime in 2-cell alkaline or single LiFePO₄ systems.
Enable-Controlled Shutdown	EN pin reduces ground current to 1.0µA, allowing precise system-level power sequencing and zero-power sleep modes.
Integrated Protection	Thermal shutdown, overcurrent limit, and reverse-current blocking prevent damage during fault conditions and hot-swap events.
Low-Noise Regulation	30µV_RMS output noise (10Hz–100kHz) and 60dB PSRR ensure clean power for ADC references, RF synthesizers, and precision op-amps.

Applications

USB-Powered Sensor Node

Industrial Data Logger

Use Scenario: A battery-backed environmental sensor node powered via USB-C PD negotiation or direct 5V bus, requiring stable 1.5V for I²C temperature/humidity sensors and low-power MCU core logic.

IC Role / Device Role / Timing Role: Primary 1.5V LDO delivering regulated rail to sensor interface and MCU V_CORE, with EN pin synchronized to MCU wake-up signal.

Use Value: 100mV dropout allows operation down to 1.6V input, extending usable battery life by >15% compared to standard LDOs; 30µV_RMS noise prevents measurement drift in 16-bit ADC readings.

Use Scenario: Ruggedized field data logger using 12V industrial bus or 3.7V Li-ion pack, powering 1.5V real-time clock (RTC), EEPROM, and low-voltage comparators.

IC Role / Device Role / Timing Role: Standby-power LDO supplying RTC and memory backup circuits; EN pin controlled by main system controller to isolate during deep sleep.

Use Value: 1.0µA shutdown current reduces annual battery drain to <1% capacity; 24V max input rating eliminates need for front-end pre-regulator in 12V/24V industrial environments.

Portable Medical Monitor

Automotive Body Control Module

Use Scenario: Handheld pulse oximeter with dual 1.5V rails for analog front-end (AFE) and digital signal processor (DSP), powered by CR2032 or rechargeable Li-ion.

IC Role / Device Role / Timing Role: Dual-rail LDO providing isolated 1.5V supplies - one for noise-sensitive AFE, one for DSP core - both enabled only during measurement cycles.

Use Value: 60dB PSRR at 1kHz rejects switching noise from display backlight DC/DC; ±2% accuracy ensures consistent AFE gain calibration across temperature.

Use Scenario: Low-power body control module (BCM) sub-circuit requiring 1.5V for LIN transceiver biasing and EEPROM configuration storage, operating from vehicle 12V battery with cold-crank dips to 6V.

IC Role / Device Role / Timing Role: Secondary LDO generating 1.5V from 5V intermediate rail, with thermal shutdown protecting against enclosure overheating in sealed modules.

Use Value: 129°C/W θ_JA enables 200mA delivery at +85°C ambient without derating; reverse-current protection prevents backfeed into 5V rail during brownout.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
AP2210-15Y-13	Same SOT89 package and 1.5V output, but higher 350mV dropout at 100mA and 65µA quiescent current.	Lacks enable pin and thermal shutdown; suitable only for non-critical, low-power always-on functions.	Select when cost sensitivity outweighs thermal safety and dynamic power control requirements.
MCP1703T-1502E/MB	SOT89-3 package, 1.5V output, 600mV dropout at 250mA, 2.5µA quiescent current, but no enable pin or reverse-current protection.	Higher dropout limits use below 2.1V input; lacks EN control for system-level power management.	Prefer for ultra-low-I_Q applications where enable functionality and reverse-current blocking are not required.

Compared with AP2205-15Y-13, AP2210-15Y-13 trades enable control and thermal protection for lower cost, while MCP1703T-1502E/MB offers lower quiescent current but sacrifices dropout performance and fault protection - making AP2205-15Y-13 optimal for thermally constrained, dynamically powered systems requiring robustness and precision.

Availability

AP2205-15Y-13 is available at Aetrix Electronics and suitable for USB-powered sensor nodes, portable medical monitors, and industrial data loggers requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.

Supply support for AP2205-15Y-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 manufacturer of discrete semiconductors and analog ICs, specializing in high-reliability power management, signal integrity, and protection solutions for industrial, automotive, and consumer markets.

The AP2205 series belongs to Diodes' wide-input ULDO regulator product line, engineered specifically for battery-powered and multi-rail systems demanding low dropout, high PSRR, and integrated protection without external components.

FAQ

What is the minimum input voltage required for AP2205-15Y-13 to regulate at 1.5V?

The AP2205-15Y-13 requires a minimum input voltage of 2.3V per datasheet specifications. At 1.5V output, this provides 0.8V headroom - sufficient for stable regulation even at full 200mA load, where dropout rises to 320mV. Operation below 2.3V risks loss of regulation and uncontrolled output collapse.

Can AP2205-15Y-13 be used with ceramic output capacitors smaller than 2.2µF?

Yes - the AP2205-15Y-13 is explicitly designed for low-ESR ceramic capacitors and remains stable with output capacitance as low as 1.0µF (per typical application circuit). However, using 2.2µF or higher improves transient response and PSRR above 10kHz, especially under dynamic load steps common in microcontroller-based systems.

Does the SOT89 package's exposed pad require a thermal via array?

While not mandatory, connecting the SOT89 exposed pad (pin 2) to a ≥1 cm² internal or bottom-side GND copper pour - supplemented with ≥4 thermal vias (0.3mm diameter, spaced ≤2mm apart) - reduces θ_JA by up to 25°C/W. This enables sustained 200mA operation at +85°C ambient without thermal throttling.

Is AP2205-15Y-13 qualified for automotive applications per AEC-Q100?

No - the AP2205-15Y-13 is not AEC-Q100 qualified. Diodes offers automotive-grade variants (e.g., AP2205Q series) with extended temperature range (−40°C to +125°C), PPAP documentation, and IATF 16949 manufacturing - but AP2205-15Y-13 is rated for −40°C to +125°C junction temperature and intended for industrial and commercial applications only.

AP2205-15Y-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):: 1.5V

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

AP2205-15Y-13 FAQ

1.How can I place an order for AP2205-15Y-13 through Aetrix?

Please submit a Request for Quotation (RFQ) for AP2205-15Y-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 AP2205-15Y-13 reliable?

The price and inventory of AP2205-15Y-13 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AP2205-15Y-13 is usually 5 days.

3.What payment methods are accepted for AP2205-15Y-13?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AP2205-15Y-13 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for AP2205-15Y-13?

AP2205-15Y-13 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your AP2205-15Y-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 AP2205-15Y-13?

For technical support, including AP2205-15Y-13 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AP2205-15Y-13 requirements.

6.How does Aetrix verify that AP2205-15Y-13 is sourced from the original manufacturer or authorized distributors?

All AP2205-15Y-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 AP2205-15Y-13 meets industry standards.

7.What is the process for return or replacement of AP2205-15Y-13?

All AP2205-15Y-13 units undergo pre-shipment inspection (PSI). If there is an issue with AP2205-15Y-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 AP2205-15Y-13 part is unused and in its original packaging.

Return procedure for AP2205-15Y-13:

1.Submit a request within 90 days.

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

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