AL5809 Constant Current Linear LED Driver: Pinout, Features and Datasheet
Tin PMIC 2 Pin 3.5V SOD-123
The AL5809 is a constant current linear LED driver and it provides a cost-effective two pin solution. It has an excellent temperature stability of 20ppm/°C and the current accuracy ± 5% regulated over a wide voltage and temperature range. Furthermore, Huge range of Semiconductors, Capacitors, Resistors and IcS in stock. Welcome RFQ.

LED Driver circuit explained - Constant current vs Constant Voltage - Let there be light
AL5809 Pinout
The following figure is the diagram of AL5809 Pinout.

Pinout
AL5809 CAD Model
The followings are AL5809 Symbol, Footprint, and 3D Model.

PCB Symbol

PCB Footprint

3D Model
AL5809 Description
The AL5809 is a constant current linear LED driver and it provides a cost-effective two pin solution. It has an excellent temperature stability of 20ppm/°C and the current accuracy ± 5% regulated over a wide voltage and temperature range. The AL5809 comes in various fixed output current versions removing the need for external current setting resistors creating a simple solution for the linear driving of LEDs. It supports both the high-side and low-side driving of LED chains. The AL5809 turns on when the voltage between IN and OUT swings from 2.5V up to 60V enabling it drive long LED chains. The floating ground, 60V Voltage rating between Input and Output pins designed to withstand the high peak voltage incurred in offline applications. The AL5809 is available in either thermally robust package PowerDI123 or SOD-123 package.
This article will introduce AL5809 systematically from its features, pinout to its specifications, applications, also including AL5809 datasheet and so much more.
AL5809 Features
● 2.5V to 60V Operating Voltage Between Two Terminals
● Robust Power Package Up to 1.2W for PowerDI®-123
● -40°C to +125°C Temperature Range
● ± 5% LED Current Tolerance Over-Temperature
● 15mA, 20mA, 25mA, 30mA, 40mA, 50mA, 60mA, 90mA, 100mA, 120mA, and 150mA Available in PowerDI123 Package
● 15mA, 20mA, 25mA, 30mA, 40mA and 50mA available in SOD123 Package, Other Current Options Available by Request
● Constant Current with Low Temperature Drift and High Power Supply Rejection Ratio
● Totally Lead-Free & Fully RoHS Compliant
● Halogen and Antimony Free. “Green” Device
Specifications
- TypeParameter
- Factory Lead Time19 Weeks
- Contact Plating
Contact plating (finish) provides corrosion protection for base metals and optimizes the mechanical and electrical properties of the contact interfaces.
Tin - Mount
In electronic components, the term "Mount" typically refers to the method or process of physically attaching or fixing a component onto a circuit board or other electronic device. This can involve soldering, adhesive bonding, or other techniques to secure the component in place. The mounting process is crucial for ensuring proper electrical connections and mechanical stability within the electronic system. Different components may have specific mounting requirements based on their size, shape, and function, and manufacturers provide guidelines for proper mounting procedures to ensure optimal performance and reliability of the electronic device.
Surface Mount - Mounting Type
The "Mounting Type" in electronic components refers to the method used to attach or connect a component to a circuit board or other substrate, such as through-hole, surface-mount, or panel mount.
Surface Mount - Package / Case
refers to the protective housing that encases an electronic component, providing mechanical support, electrical connections, and thermal management.
SOD-123 - Number of Pins2
- Operating Temperature
The operating temperature is the range of ambient temperature within which a power supply, or any other electrical equipment, operate in. This ranges from a minimum operating temperature, to a peak or maximum operating temperature, outside which, the power supply may fail.
-40°C~125°C TA - Packaging
Semiconductor package is a carrier / shell used to contain and cover one or more semiconductor components or integrated circuits. The material of the shell can be metal, plastic, glass or ceramic.
Tape & Reel (TR) - Published2014
- JESD-609 Code
The "JESD-609 Code" in electronic components refers to a standardized marking code that indicates the lead-free solder composition and finish of electronic components for compliance with environmental regulations.
e3 - Part Status
Parts can have many statuses as they progress through the configuration, analysis, review, and approval stages.
Active - Moisture Sensitivity Level (MSL)
Moisture Sensitivity Level (MSL) is a standardized rating that indicates the susceptibility of electronic components, particularly semiconductors, to moisture-induced damage during storage and the soldering process, defining the allowable exposure time to ambient conditions before they require special handling or baking to prevent failures
3 (168 Hours) - Number of Terminations2
- ECCN Code
An ECCN (Export Control Classification Number) is an alphanumeric code used by the U.S. Bureau of Industry and Security to identify and categorize electronic components and other dual-use items that may require an export license based on their technical characteristics and potential for military use.
EAR99 - TypeLinear
- Applications
The parameter "Applications" in electronic components refers to the specific uses or functions for which a component is designed. It encompasses various fields such as consumer electronics, industrial automation, telecommunications, automotive, and medical devices. Understanding the applications helps in selecting the right components for a particular design based on performance, reliability, and compatibility requirements. This parameter also guides manufacturers in targeting their products to relevant markets and customer needs.
Signage - Terminal Position
In electronic components, the term "Terminal Position" refers to the physical location of the connection points on the component where external electrical connections can be made. These connection points, known as terminals, are typically used to attach wires, leads, or other components to the main body of the electronic component. The terminal position is important for ensuring proper connectivity and functionality of the component within a circuit. It is often specified in technical datasheets or component specifications to help designers and engineers understand how to properly integrate the component into their circuit designs.
DUAL - Terminal Form
Occurring at or forming the end of a series, succession, or the like; closing; concluding.
GULL WING - Peak Reflow Temperature (Cel)
Peak Reflow Temperature (Cel) is a parameter that specifies the maximum temperature at which an electronic component can be exposed during the reflow soldering process. Reflow soldering is a common method used to attach electronic components to a circuit board. The Peak Reflow Temperature is crucial because it ensures that the component is not damaged or degraded during the soldering process. Exceeding the specified Peak Reflow Temperature can lead to issues such as component failure, reduced performance, or even permanent damage to the component. It is important for manufacturers and assemblers to adhere to the recommended Peak Reflow Temperature to ensure the reliability and functionality of the electronic components.
260 - Number of Functions1
- Supply Voltage
Supply voltage refers to the electrical potential difference provided to an electronic component or circuit. It is crucial for the proper operation of devices, as it powers their functions and determines performance characteristics. The supply voltage must be within specified limits to ensure reliability and prevent damage to components. Different electronic devices have specific supply voltage requirements, which can vary widely depending on their design and intended application.
3.5V - Time@Peak Reflow Temperature-Max (s)
Time@Peak Reflow Temperature-Max (s) refers to the maximum duration that an electronic component can be exposed to the peak reflow temperature during the soldering process, which is crucial for ensuring reliable solder joint formation without damaging the component.
30 - Number of Outputs1
- Max Output Current
The maximum current that can be supplied to the load.
21mA - Max Supply Voltage
In general, the absolute maximum common-mode voltage is VEE-0.3V and VCC+0.3V, but for products without a protection element at the VCC side, voltages up to the absolute maximum rated supply voltage (i.e. VEE+36V) can be supplied, regardless of supply voltage.
60V - Min Input Voltage
The parameter "Min Input Voltage" in electronic components refers to the minimum voltage level that must be applied to the component for it to operate within its specified parameters. This value is crucial as providing a voltage below this minimum threshold may result in the component malfunctioning or not functioning at all. It is important to adhere to the specified minimum input voltage to ensure the proper operation and longevity of the electronic component. Failure to meet this requirement may lead to potential damage to the component or the overall system in which it is used.
2.5V - Max Input Voltage
Max Input Voltage refers to the maximum voltage level that an electronic component can safely handle without getting damaged. This parameter is crucial for ensuring the proper functioning and longevity of the component. Exceeding the specified maximum input voltage can lead to overheating, electrical breakdown, or permanent damage to the component. It is important to carefully adhere to the manufacturer's guidelines regarding the maximum input voltage to prevent any potential issues and maintain the reliability of the electronic device.
60V - Output Current per Channel
Output Current per Channel is a specification commonly found in electronic components such as amplifiers, audio interfaces, and power supplies. It refers to the maximum amount of electrical current that can be delivered by each individual output channel of the component. This parameter is important because it determines the capacity of the component to drive connected devices or loads. A higher output current per channel means the component can deliver more power to connected devices, while a lower output current may limit the performance or functionality of the component in certain applications. It is crucial to consider the output current per channel when selecting electronic components to ensure they can meet the power requirements of the intended system or setup.
20mA - Internal Switch(s)
The term "Internal Switch(s)" in electronic components typically refers to a built-in mechanism within a device that allows for the control of electrical current flow. These internal switches can be used to turn circuits on or off, change the direction of current, or regulate the flow of electricity within the component. They are often designed to be controlled externally, either manually or automatically, to enable various functions or operations within the electronic device. Internal switches play a crucial role in the overall functionality and performance of electronic components by providing a means to manage and manipulate electrical signals effectively.
Yes - Dimming
Dimming is a feature in electronic components, such as LED lights or display screens, that allows the user to adjust the brightness level of the device. It is a method of controlling the amount of light output by the component, typically by varying the voltage or current supplied to it. Dimming can be achieved through various techniques, such as pulse-width modulation (PWM) or analog dimming. This feature is commonly used to save energy, create ambiance, or enhance visual comfort in different applications.
PWM - Number of Segments2
- Multiplexed Display Capability
Multiplexed Display Capability refers to the ability of an electronic component or system to control multiple display elements using fewer input/output lines. This is achieved by rapidly switching between different displays or segments, allowing for efficient communication and reduced wiring complexity. In multiplexed systems, each display is activated sequentially, creating the illusion of simultaneous display to the user. This capability is commonly utilized in devices like LED matrices and LCD screens to enhance functionality while conserving space and resources.
NO - RoHS Status
RoHS means “Restriction of Certain Hazardous Substances” in the “Hazardous Substances Directive” in electrical and electronic equipment.
ROHS3 Compliant
AL5809 Functional Block Diagram
The following is the Functional Block Diagram of AL5809.

Functional Block Diagram
AL5809 Typical Applications Circuit
The following diagrams show the AL5809 Typical Applications Circuit.

Low Side LED String

High Side LED String
Parts with Similar Specs
- ImagePart NumberManufacturerPackage / CaseNumber of PinsNumber of OutputsMin Input VoltageMax Input VoltageMax Output CurrentRoHS StatusMounting TypeView Compare
AL5809-20S1-7
SOD-123
2
1
2.5 V
60 V
21 mA
ROHS3 Compliant
Surface Mount
SOD-123
2
1
2.5 V
60 V
50 mA
ROHS3 Compliant
Surface Mount
SOD-123
2
1
2.5 V
60 V
40 mA
ROHS3 Compliant
Surface Mount
SOD-123
2
-
-
45 V
22 mA
ROHS3 Compliant
Surface Mount
SOD-123
2
-
-
-
13 mA
ROHS3 Compliant
Surface Mount
AL5809 Applications
● Offline LED Lamps
● LED Power Supplies
● White Goods
● LED Signs
● Instrumentation Illumination
AL5809 Package
The following diagrams show the AL5809 Package.

View A

View B

View C
AL5809 Package Marking Information
The following is the Marking Information of AL5809.

Marking Information
AL5809 Suggested Pad Layout
The following diagram shows the AL5809 Suggested Pad Layout.

Suggested Pad Layout
AL5809 Manufacturer
Diodes Incorporated delivers high-quality semiconductor products to the world's leading companies in the consumer electronics, computing, communications, industrial, and automotive markets. They leverage their expanded product portfolio of discrete, analog, and mixed-signal products and leading-edge packaging technology to meet customers' needs. Their broad range of application-specific solutions and solutions-focused sales, coupled with worldwide operations of 25 sites, including engineering, testing, manufacturing, and customer service, enables us to be a premier provider for high-volume, high-growth markets.
Datasheet PDF
- Environmental Information :
- Datasheets :
How many pins of AL5809-20S1-7?
2 Pins.
What’s the operating temperature of AL5809-20S1-7?
-40°C~125°C TA.
What is the essential property of the AL5809?
The AL5809 is a constant current linear LED driver and it provides a cost-effective two pin solution. It has an excellent temperature stability of 20ppm/°C and the current accuracy ± 5% regulated over a wide voltage and temperature range.
A Comprehensive Guide to LTC6603CUF#TRPBF Active Filter06 March 202487
Atmel ATmega48/V, ATmega88/V, ATmega168/V: Unveiling the 8-bit Microcontroller with In-System Programmable Flash28 February 2024148
MCP3008 IC: Datasheet, Pinout, Specifications27 August 20217988
TPS92515QDGQRQ1 LED Drivers: Equivalence, Datasheet, and Pinout21 March 20221130
MMBD4148 Switching Diode: Datasheet, Alternatives, Pinout10 February 20221127
TIP120 vs TIP122 Darlington NPN Transistor29 July 20228659
MIC5219 LDO Regulator: Datasheet, Pinout and Circuit04 August 20214085
OPA1652 Audio Operational Amplifier: Datasheet, Pinout and Replacement23 September 20212403
50 Frequently Asked Questions about Oscilloscope22 November 202110276
Multiplexers: Types, Functionality, and Applications21 April 2025988
Active Electroacoustic Resonator-Silent Speaker10 November 20213750
An Overview of Digital Signal Processor31 October 20257797
Exploring the Cyber Physical System of Electric Vehicles25 March 20242466
Getting Started with Arduino: What is Arduino and How to Use Arduino Boards28 September 20234550
Exploring an Advanced Approach to Thermal Design for Dual-Sided Cooling of Power Semiconductor Modules in Electric and Hybrid Vehicles07 September 2023747
What is an Encoder?20 October 20206953
Diodes Incorporated
In Stock: 930
Minimum: 1 Multiples: 1
Qty
Unit Price
Ext Price
1
$0.263999
$0.26
10
$0.249056
$2.49
100
$0.234959
$23.50
500
$0.221659
$110.83
1000
$0.209112
$209.11
Not the price you want? Send RFQ Now and we'll contact you ASAP.
Inquire for More Quantity

















