LM3405AXMKE Texas Instruments Integrated Circuit (SOT23 (6-Pin)) In Stock
Texas Instruments LM3405AXMKE is a constant-current step-down LED driver IC designed for driving high-brightness LEDs efficiently. It operates as a buck converter with integrated switch and is housed in a compact 6-pin TSOT-23 package. Suitable for LED backlighting, indicator, and general illumination designs in portable and consumer electronics.
- Manufacturer
- Texas Instruments
- Package
- SOT23 (6-Pin)
- Pin Count
- 6
- Lifecycle
- OBSOLETE
- Datasheet
- LM3405AXMKE Datasheet PDF
- Category
- Integrated Circuit
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
What are the key features of LM3405AXMKE?
- Constant-current buck LED driver with integrated switch for efficient high-brightness LED power management
- 6-pin TSOT-23 package minimizing PCB footprint in portable and space-constrained LED lighting designs
- Step-down converter topology supporting input voltages higher than the LED forward voltage string
- Adjustable LED current setting via external resistor enabling flexible brightness control without microcontroller
What is LM3405AXMKE used for?
The LM3405AXMKE is designed for driving single or multiple series-connected high-brightness LEDs in portable device backlights, indicator lamps, and compact LED luminaires. Its step-down buck topology ensures higher efficiency than linear regulators when the input supply voltage significantly exceeds the LED forward voltage. The 6-pin TSOT-23 package enables high-density PCB placement in handheld devices, wearables, and automotive indicator light modules.
What are the specifications of LM3405AXMKE?
| Pbfree Code | No |
| YTEOL | 0 |
| Package | SOT23 (6-Pin) |
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
| ECCN | EAR99 |
| HTS Code | 8542.39.00.60 |
Where can I find the LM3405AXMKE datasheet?
LM3405AXMKE Datasheet DownloadOfficial datasheet from Texas Instruments
What are equivalent replacements for LM3405AXMKE?
Compatible alternatives and drop-in replacements for LM3405AXMKE:
Frequently Asked Questions
What converter topology does the LM3405AXMKE use to drive LEDs, and why is it more efficient than a linear approach?
The LM3405AXMKE uses a step-down (buck) converter topology with an integrated switch, which only dissipates power proportional to the voltage difference. This is far more efficient than a linear current regulator when the input voltage is significantly higher than the LED forward voltage, typically achieving efficiencies above 80% in 5 V to 12 V input LED driver designs.
How is the LED current programmed on the LM3405AXMKE?
The LED current on the LM3405AXMKE is set by a single external resistor connected to the IADJ pin, allowing flexible brightness adjustment without requiring a microcontroller or digital interface. This resistor-programmed constant-current approach simplifies the circuit to a minimum external component count in the 6-pin TSOT-23 package, reducing BOM complexity for LED backlights and indicators.
In which LED application categories is the LM3405AXMKE commonly deployed?
The LM3405AXMKE is deployed in portable device LCD backlights, handheld indicator LEDs, and compact consumer luminaire designs where a small 6-pin TSOT-23 footprint and external component count below 5 parts are required. Its step-down topology handles input supplies from approximately 3 V to 15 V, supporting both single-cell Li-Ion and multi-cell alkaline battery-powered LED lighting systems.
What package does the LM3405AXMKE use and how does it benefit high-density PCB layouts?
The LM3405AXMKE uses a 6-pin TSOT-23 small-outline transistor package, one of the smallest surface-mount IC form factors available. This compact package occupies minimal board area — typically under 10 mm² including external components — making it ideal for wearable devices, smartphone accessories, and automotive indicator modules with stringent space budgets.
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Why Buy from FindMyChip
About Texas Instruments
Texas Instruments (TI) is a global semiconductor company headquartered in Dallas, Texas. TI designs and manufactures analog and embedded processing chips used in industrial, automotive, consumer, communications, and enterprise systems.
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