AL8805W5-7 LED Driver: Circuit, Pinout, and Datasheet
Tin PMIC AL8805 5 Pin 12V SC-74A, SOT-753
The AL8805W5-7 is a constant current step-down DC/DC converter designed to drive LEDs. This article mainly introduces Circuit, Pinout, Datasheet and other detailed information about Diodes Incorporated AL8805W5-7.

How To Choose The Correct LED Driver For Your LED Lights
- AL8805W5-7 Description
- AL8805W5-7 Pinout
- AL8805W5-7 CAD Model
- AL8805W5-7 Features
- Specifications
- Parts with Similar Specs
- AL8805W5-7 Ordering Information
- AL8805W5-7 Typical Applications Circuit
- AL8805W5-7 LED Current Control
- AL8805W5-7 Alternatives
- AL8805W5-7 Applications
- AL8805W5-7 Package
- AL8805W5-7 Manufacturer
- Trend Analysis
- Datasheet PDF
AL8805W5-7 Description
The AL8805W5-7 is a constant current step-down DC/DC converter designed to drive LEDs. Depending on the forward voltage of the LEDs. The device can drive up to 8 LEDs in series from a power source of 6V to 36V. The LEDs are connected in series, resulting in identical LED currents, consistent brightness, and the elimination of ballast resistors. The AL8805 can switch at up to 1MHz in frequency. This enables for the use of small external components, reducing the amount of PCB space required.
An extra resistor attached between the VIN and SET input pins controls the maximum output current of the AL8805W5-7. The CTRL input pin is used to dim the light by adding a DC voltage or a PWM signal. PWM dimming is made easier with an input voltage of 0.4V or lower at CTRL, which turns off the output MOSFET.
AL8805W5-7 Pinout
The AL8805W5-7 Pinout is shown as follows.

Pinout
| Pin Number | Pin Name | Description |
| 1 | SW | Switch Pin. Connect inductor/freewheeling diode here, minimizing track length at this pin to reduce EMI. |
| 2 | GND | GND Pin |
| 3 | CTRL | Dimming and On/Off Control Input. • Leave floating for normal operation. (VCTRL = VREF = 2.5V giving nominal average output current IOUTnom = 0.1/RS) • Drive to voltage below 0.4V to turn off output current • Drive with DC voltage (0.5V < VCTRL < 2.5V) to adjust output current from 20% to 100% of IOUTnom • A PWM signal (low level ≤ 0.4V and high level > 2.6; transition times less than 1us) allows the output current to be adjusted below the level set by the resistor connected to SET input pin. |
| 4 | SET | Set Nominal Output Current Pin. Configure the output current of the device. |
| 5 | VIN | Input Supply Pin. Must be locally decoupled to GND with > 2.2µF X7R ceramic capacitor – see applications section for more information. |
AL8805W5-7 CAD Model
The followings are AL8805W5-7 Symbol, Footprint and 3D Model.

Symbol

Footprint

3D Model
AL8805W5-7 Features
• LED Driving Current up to 1A
• Better than 5% Accuracy
• High Efficiency up to 98%
• Operating Input Voltage from 6V to 36V
• High Switching Frequency up to 1MHz
• PWM/DC Input for Dimming Control
• Built-In Output Open-Circuit Protection
• SOT25: Available in “Green” Molding Compound (No Br, Sb) with lead-Free Finish/ RoHS Compliant
-Totally Lead-Free & Fully RoHS Compliant
-Halogen and Antimony Free. “Green” Device
Specifications
- TypeParameter
- Factory Lead Time21 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.
SC-74A, SOT-753 - Number of Pins5
- SwitchingFrequency1MHz
- 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 TJ - 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) - Published2011
- 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 - Pbfree Code
The "Pbfree Code" parameter in electronic components refers to the code or marking used to indicate that the component is lead-free. Lead (Pb) is a toxic substance that has been widely used in electronic components for many years, but due to environmental concerns, there has been a shift towards lead-free alternatives. The Pbfree Code helps manufacturers and users easily identify components that do not contain lead, ensuring compliance with regulations and promoting environmentally friendly practices. It is important to pay attention to the Pbfree Code when selecting electronic components to ensure they meet the necessary requirements for lead-free applications.
yes - 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
1 (Unlimited) - Number of Terminations5
- 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 - TypeDC DC Regulator
- 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.
12V - 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.
40 - Base Part Number
The "Base Part Number" (BPN) in electronic components serves a similar purpose to the "Base Product Number." It refers to the primary identifier for a component that captures the essential characteristics shared by a group of similar components. The BPN provides a fundamental way to reference a family or series of components without specifying all the variations and specific details.
AL8805 - Pin Count
a count of all of the component leads (or pins)
5 - Number of Outputs1
- Output Voltage
Output voltage is a crucial parameter in electronic components that refers to the voltage level produced by the component as a result of its operation. It represents the electrical potential difference between the output terminal of the component and a reference point, typically ground. The output voltage is a key factor in determining the performance and functionality of the component, as it dictates the level of voltage that will be delivered to the connected circuit or load. It is often specified in datasheets and technical specifications to ensure compatibility and proper functioning within a given system.
30V - 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.
30V - Min Supply Voltage
The minimum supply voltage (V min ) is explored for sequential logic circuits by statistically simulating the impact of within-die process variations and gate-dielectric soft breakdown on data retention and hold time.
6V - Nominal Supply Current
Nominal current is the same as the rated current. It is the current drawn by the motor while delivering rated mechanical output at its shaft.
5μA - Output Current
The rated output current is the maximum load current that a power supply can provide at a specified ambient temperature. A power supply can never provide more current that it's rated output current unless there is a fault, such as short circuit at the load.
1A - Max Supply Current
Max Supply Current refers to the maximum amount of electrical current that a component can draw from its power supply under normal operating conditions. It is a critical parameter that ensures the component operates reliably without exceeding its thermal limits or damaging internal circuitry. Exceeding this current can lead to overheating, performance degradation, or failure of the component. Understanding this parameter is essential for designing circuits that provide adequate power while avoiding overload situations.
1A - Topology
In the context of electronic components, "topology" refers to the arrangement or configuration of the components within a circuit or system. It defines how the components are connected to each other and how signals flow between them. The choice of topology can significantly impact the performance, efficiency, and functionality of the electronic system. Common topologies include series, parallel, star, mesh, and hybrid configurations, each with its own advantages and limitations. Designers carefully select the appropriate topology based on the specific requirements of the circuit to achieve the desired performance and functionality.
Step-Down (Buck) - 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.
6V - 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.
36V - 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.
1A - 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.
Analog, PWM - Number of Segments8
- 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 - Height1.1mm
- Length3mm
- Width1.6mm
- REACH SVHC
The parameter "REACH SVHC" in electronic components refers to the compliance with the Registration, Evaluation, Authorization, and Restriction of Chemicals (REACH) regulation regarding Substances of Very High Concern (SVHC). SVHCs are substances that may have serious effects on human health or the environment, and their use is regulated under REACH to ensure their safe handling and minimize their impact.Manufacturers of electronic components need to declare if their products contain any SVHCs above a certain threshold concentration and provide information on the safe use of these substances. This information allows customers to make informed decisions about the potential risks associated with using the components and take appropriate measures to mitigate any hazards.Ensuring compliance with REACH SVHC requirements is essential for electronics manufacturers to meet regulatory standards, protect human health and the environment, and maintain transparency in their supply chain. It also demonstrates a commitment to sustainability and responsible manufacturing practices in the electronics industry.
No SVHC - Radiation Hardening
Radiation hardening is the process of making electronic components and circuits resistant to damage or malfunction caused by high levels of ionizing radiation, especially for environments in outer space (especially beyond the low Earth orbit), around nuclear reactors and particle accelerators, or during nuclear accidents or nuclear warfare.
No - RoHS Status
RoHS means “Restriction of Certain Hazardous Substances” in the “Hazardous Substances Directive” in electrical and electronic equipment.
ROHS3 Compliant - Lead Free
Lead Free is a term used to describe electronic components that do not contain lead as part of their composition. Lead is a toxic material that can have harmful effects on human health and the environment, so the electronics industry has been moving towards lead-free components to reduce these risks. Lead-free components are typically made using alternative materials such as silver, copper, and tin. Manufacturers must comply with regulations such as the Restriction of Hazardous Substances (RoHS) directive to ensure that their products are lead-free and environmentally friendly.
Lead Free
Parts with Similar Specs
- ImagePart NumberManufacturerPackage / CaseNumber of PinsNumber of OutputsOutput VoltageNumber of TerminationsTime@Peak Reflow Temperature-Max (s)REACH SVHCLead FreeView Compare
AL8805W5-7
SC-74A, SOT-753
5
1
30 V
5
40
No SVHC
Lead Free
SC-74A, SOT-753
5
1
24 V
5
40
No SVHC
Lead Free
SC-74A, SOT-753
5
1
-
5
40
No SVHC
Lead Free
SC-74A, SOT-753
5
-
-
5
40
No SVHC
Lead Free
AL8805W5-7 Ordering Information
The following figure is AL8805W5-7 Ordering Information.

Ordering Information
| Device | Package Code | Packaging | 7” Tape and Reel | |
| Quantity | Part Number Suffix | |||
| AL8805W5-7 | W5 | SOT25 | 3000/Tape & Reel | -7 |
AL8805W5-7 Typical Applications Circuit
The following figure is AL8805W5-7 Typical Applications Circuit.

Typical Applications Circuit
AL8805W5-7 LED Current Control
The LED current is controlled by the resistor R1 in the figure as follows.
Connected between VIN and SET the nominal average output current in the LED(s) is defined as:
ILED=VTHD/RSET
If the CTRL pin is driven by an external voltage (higher than 0.4V and lower than 2.5V), the average LED current is:
ILED=VCTRL/VREF • VTHD/RSET
For example for a desired LED current of 660mA and a default voltage VCTRL=2.5V the resulting resistor is:
RSET=VTHD/ILED • VCTRL/VREF=0.1/0.66 • 2.5/2.5≈150mΩ

LED Current Control
AL8805W5-7 Alternatives
| Part Number | Description | Manufacturer |
| TPS92023DRDRIVERS AND INTERFACES | Resonant-Switching Driver Controller for LED Lighting 8-SOIC -40 to 125 | Texas Instruments |
| TPS92023DDRIVERS AND INTERFACES | Resonant-Switching Driver Controller for LED Lighting 8-SOIC -40 to 125 | Texas Instruments |
AL8805W5-7 Applications
• MR16 Lamps
• General Illumination Lamps
AL8805W5-7 Package
The AL8805W5-7 Package is shown as follows.

Package
AL8805W5-7 Manufacturer
Diodes Incorporated manufactures high-quality semiconductors for the consumer electronics, computing, communications, industrial, and automotive industries. To suit clients' needs, they use their enlarged product line of discrete, analog, and mixed-signal components, as well as cutting-edge packaging technologies. We can be a premier provider for high-volume, high-growth markets because of our comprehensive range of application-specific solutions and solutions-focused sales, as well as our global operations of 25 facilities, which include engineering, testing, production, and customer service.
Trend Analysis
Datasheet PDF
- Environmental Information :
- Datasheets :
- PCN Design/Specification :
- PCN Assembly/Origin :
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Diodes Incorporated
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