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

Diodes Incorporated AP1117K15G-13

Name: AP1117K15G-13
Brand: Diodes Incorporated
SKU: AP1117K15G-13
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: AP1117K15G-13

Manufacturer:: Diodes Incorporated

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

Package:: TO-263-3, D2PAK (2 Leads + Tab), TO-263AB

Datasheet:: AP1117K15G-13.pdf

Description:: IC REG LINEAR 1.5V 1A TO263-2

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Product details

Overview

AP1117K15G-13 from Diodes Incorporated is a 1A low-dropout linear voltage regulator with fixed 1.5V output, TO263-3L package, 1.4V max dropout at full load, ±2% output voltage accuracy, and integrated thermal shutdown. It delivers stable power for low-voltage logic supplies in VGA cards, PC peripherals, and communication interfaces where input supply ranges from 3V to 18V.

For engineers reviewing the AP1117K15G-13 datasheet, AP1117K15G-13 pinout, AP1117K15G-13 application, or AP1117K15G-13 equivalent, key selection criteria include dropout voltage under 1.4V at 1A, fixed 1.5V output tolerance, thermal shutdown behavior, minimum load current requirement (5–10mA), and TO263-3L thermal resistance (θ_JA = 60°C/W, θ_JC = 3.5°C/W).

Technical Context

The AP1117K15G-13 implements a PNP-based LDO architecture with internal reference (1.25V), error amplifier, and pass transistor - enabling fast transient response and high ripple rejection (60–70dB at 180Hz). Its fixed-output variant eliminates external resistor networks, simplifying layout for space-constrained applications.

Thermal protection activates at 150°C junction temperature, cycling output off/on during overtemperature events. Dropout voltage remains ≤1.4V across 0–125°C operating range and full 1A load, supporting regulated 1.5V outputs from as low as 2.9V input.

Key Specifications

Parameter	Value and Actual Design Meaning
Output Voltage	Fixed 1.500V ±2% (1.47–1.53V) at 10mA, 25°C - ensures compatibility with 1.5V DDR termination and low-power logic rails.
Dropout Voltage	Max 1.4V at 1A load - enables operation from 2.9V input while maintaining regulation, critical for battery-backed or multi-rail systems.
Output Current	1A continuous - sufficient for powering FPGA I/O banks, USB PHYs, or small microcontroller subsystems.
Ripple Rejection	60–70dB at 180Hz with 25µF tantalum output capacitor - suppresses switching noise from upstream DC/DC converters.
Thermal Resistance	θ_JA = 60°C/W, θ_JC = 3.5°C/W (TO263-3L) - supports >1.5W dissipation with minimal heatsinking in industrial ambient (≤50°C).
Load Regulation	±15mV (0–1A, 25°C) - maintains tight voltage stability across dynamic current steps typical in digital ICs.
Operating Temp	0°C to +125°C junction - validated for commercial-grade embedded systems including PC add-in cards and telecom line cards.

Pinout & Package

AP1117K15G-13 uses the TO263-3L (D²PAK) surface-mount package with exposed thermal tab connected to VOUT. The tab serves as the primary heat path and must be soldered to a ≥9.1mm × 10.9mm copper pour for rated performance.

Pin/Terminal	Circuit Role	Design Meaning
1 (Adj/GND)	Ground reference for fixed-mode operation	Internally tied to GND; no external connection required - distinguishes fixed 1.5V version from adjustable variants.
2 (VOUT)	Regulated output terminal	Delivers 1.5V; requires ≥10µF output capacitor (ESR 0.15–20Ω) for stability; tab is electrically connected to this pin.
3 (VIN)	Unregulated input supply	Accepts 3V–18V; must remain ≥1.3V above VOUT to sustain regulation; decoupling capacitor recommended near pin.

Key Features

Feature	Design Value
Fast transient response	Sub-100µs recovery from 100mA→1A load step - minimizes undershoot/overshoot on sensitive digital rails.
Built-in thermal shutdown	Activates at 150°C junction temperature with automatic hysteresis - prevents permanent damage during sustained overload.
Current limiting	1.1A minimum current limit - protects against short-circuit faults without external components.
Low-noise operation	60–70dB ripple rejection - reduces conducted EMI into analog sections or clock domains sharing same supply.
Green molding compound	Halogen-free (no Br/Sb), RoHS-compliant - meets environmental compliance requirements for CE-marked equipment.

Applications

VGA Graphics Card Power

PC Peripheral Interface

Use Scenario: Supplies 1.5V termination voltage for high-speed parallel bus interfaces on discrete GPU boards.

IC Role / Device Role / Timing Role: Fixed-output LDO providing clean, low-noise bias for DDR memory termination resistors and display controller I/O.

Use Value: 1.4V dropout enables use of 3.3V rail as input source, reducing need for dedicated higher-voltage supplies and simplifying board-level power architecture.

Use Scenario: Powers USB 2.0 transceivers and PCIe endpoint logic in docking stations and expansion cards.

IC Role / Device Role / Timing Role: Primary 1.5V regulator for interface PHY layers requiring tight voltage tolerance and fast load-step response.

Use Value: ±2% output accuracy and <15mV load regulation ensure signal integrity margins are maintained across full operating temperature and current range.

Communication Module Bias

Industrial Control Logic

Use Scenario: Generates 1.5V supply for RS-485 transceiver biasing and isolated CAN node controllers in fieldbus gateways.

IC Role / Device Role / Timing Role: Stable local regulator decoupled from noisy main system rail, supporting reliable differential signaling.

Use Value: 70dB ripple rejection suppresses switching noise from adjacent DC/DC converters, preventing bit errors in long-haul serial links.

Use Scenario: Powers programmable logic devices (CPLDs) and sensor interface ASICs in factory automation I/O modules.

IC Role / Device Role / Timing Role: Low-dropout source for 1.5V core logic in thermally constrained enclosures with limited airflow.

Use Value: TO263-3L package with θ_JA = 60°C/W allows 1.5W dissipation without heatsink, reducing BOM cost and assembly complexity.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
LM1117DT-1.5/NOPB	Same 1.5V fixed output, but SOT-223-3 package (θ_JA = 107°C/W); 1.2V dropout typical at 1A.	Limited to lower power density designs due to higher thermal resistance; less suitable for compact PCB layouts.	Select when footprint compatibility with legacy SOT-223 designs is required and thermal headroom exceeds 1.2W.
MCP1700T-1502E/TT	150mA output, not 1A; 6V max input; 175mV dropout at 150mA - incompatible current rating and voltage range.	Only viable for ultra-low-power sensor nodes, not VGA cards or peripherals requiring 1A.	Avoid for any application demanding ≥500mA output; use only in battery-powered sub-100mA subsystems.

Compared with LM1117DT-1.5/NOPB, AP1117K15G-13 offers 2.3× lower thermal resistance and TO263 mounting for higher reliability in thermally dense environments; versus MCP1700T-1502E/TT, it provides 6.7× higher current capacity and broader input range, making it suitable for mainstream embedded power delivery.

Availability

AP1117K15G-13 is available at Aetrix Electronics and suitable for VGA graphics cards, PC peripheral interfaces, and industrial control logic requiring stable component supply, consistent thermal performance, and RoHS-compliant packaging.

Supply support for AP1117K15G-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 power management, signal integrity, and protection solutions for industrial, computing, and communications markets.

The AP1117 product line delivers cost-optimized, high-reliability LDO regulators targeting board-level point-of-load applications in PC peripherals, graphics subsystems, and communication infrastructure - emphasizing thermal robustness and ease of integration.

FAQ

What is the minimum input voltage required for AP1117K15G-13 to regulate at 1.5V output?

The device requires VIN ≥ VOUT + 1.3V to maintain regulation, so minimum input is 2.8V. At full 1A load, dropout is guaranteed ≤1.4V, meaning 2.9V input sustains regulation. Below 2.8V, output collapses linearly with input.

Can AP1117K15G-13 be used in adjustable mode by connecting external resistors?

No. AP1117K15G-13 is a fixed 1.5V variant - its Adj pin is internally connected to GND. Only AP1117-ADJ versions support external resistor programming; attempting adjustment on this part will result in incorrect output voltage or instability.

Is a heatsink required for AP1117K15G-13 operating at 1A with 5V input?

With 5V input and 1.5V output, power dissipation is (5 − 1.5) × 1 = 3.5W. Given θ_JA = 60°C/W, junction rise would be 210°C - exceeding 150°C rating. A heatsink or ≥25mm² thermal pad is mandatory; refer to Diodes' AP02001 layout guidelines for TO263-3L.

Does AP1117K15G-13 meet automotive AEC-Q200 requirements?

No. AP1117K15G-13 is specified for commercial temperature grade (0°C to +125°C junction), not automotive. Diodes offers AEC-Q200 qualified variants like AP1117K15G-13Q (with "Q" suffix), which undergo extended reliability testing and tighter parametric screening.

AP1117K15G-13 Specifications

Product attributes: Attribute value

Manufacturer:: Diodes Incorporated

Series:: -

Package/Case:: TO-263-3, D2PAK (2 Leads + Tab), TO-263AB

Packaging:: Tape & Reel (TR)

Product Status:: Obsolete

Output Configuration:: Positive

Output Type:: Fixed

Number of Regulators:: 1

Voltage - Input (Max):: 18V

Voltage - Output (Min/Fixed):: 1.5V

Voltage - Output (Max):: -

Voltage Dropout (Max):: 1.4V @ 1A

Current - Output:: 1A

Current - Quiescent (Iq):: 10 mA

Current - Supply (Max):: -

PSRR:: 60dB (180Hz)

Control Features:: -

Protection Features:: Over Current, Over Temperature

Operating Temperature:: 0°C ~ 125°C (TJ)

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: TO-263

AP1117K15G-13 FAQ

1.How can I place an order for AP1117K15G-13 through Aetrix?

Please submit a Request for Quotation (RFQ) for AP1117K15G-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 AP1117K15G-13 reliable?

The price and inventory of AP1117K15G-13 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AP1117K15G-13 is usually 5 days.

3.What payment methods are accepted for AP1117K15G-13?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AP1117K15G-13 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for AP1117K15G-13?

AP1117K15G-13 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your AP1117K15G-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 AP1117K15G-13?

For technical support, including AP1117K15G-13 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AP1117K15G-13 requirements.

6.How does Aetrix verify that AP1117K15G-13 is sourced from the original manufacturer or authorized distributors?

All AP1117K15G-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 AP1117K15G-13 meets industry standards.

7.What is the process for return or replacement of AP1117K15G-13?

All AP1117K15G-13 units undergo pre-shipment inspection (PSI). If there is an issue with AP1117K15G-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 AP1117K15G-13 part is unused and in its original packaging.

Return procedure for AP1117K15G-13:

1.Submit a request within 90 days.

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

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