LM3405AXMK/NOPBIn StockTexas Instruments
LM3405AXMK/NOPB is a 1A step-down LED driver by Texas Instruments in SOT-23-5 package, 2.7V–5.5V input, up to 1MHz. In stock from $0.61/unit, MOQ 305, worldwide shipping.
- Manufacturer
- Texas Instruments
- Package
- SOT-23-5
- Pin Count
- 5
- Lifecycle
- ACTIVE
- Datasheet
- LM3405AXMK/NOPB Datasheet PDF
- Category
- power-management
- Price
- From $0.6126(MOQ 305)
- Temp Range
- -40.0°C to 125.0°C
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
Key Features
- 1A constant-current output for high-brightness LEDs
- 2.7V to 5.5V wide input voltage range
- Up to 1MHz adjustable switching frequency reduces inductor size
- SOT-23-5 compact footprint for space-constrained designs
- RoHS compliant (NOPB), -40°C to 125°C operating range
Applications
Ideal for driving single or series strings of high-brightness LEDs in portable electronics, automotive lighting, and industrial indicator systems. Commonly used in backlight drivers for LCD displays, flashlights, and battery-powered LED luminaires where compact size and efficiency are critical.
Specifications
| Pbfree Code | Yes |
| YTEOL | 15 |
| Interface IC Type | LED DISPLAY DRIVER |
| JESD-30 Code | R-PDSO-G6 |
| JESD-609 Code | e3 |
| Multiplexed Display Capability | NO |
| Number of Channels | 1 |
| Number of Functions | 1 |
| Number of Segments | 1 |
| Output Characteristics | CONSTANT-CURRENT |
| Package Body Material | PLASTIC/EPOXY |
| Package Equivalence Code | TSOP6,.11,37 |
| Package Shape | RECTANGULAR |
| Package Style | SMALL OUTLINE, THIN PROFILE |
| Peak Reflow Temperature (Cel) | 260 |
| Supply Voltage-Max | 22V |
| Supply Voltage-Min | 3V |
| Supply Voltage-Nom | 12V |
| Surface Mount | YES |
| Terminal Finish | Matte Tin (Sn) |
| Terminal Form | GULL WING |
| Terminal Pitch | 0.95mm |
| Terminal Position | DUAL |
| Time@Peak Reflow Temperature-Max (s) | 30 |
| fmax-Min | 0.005MHz |
| Package | SOT-23-5 |
Compliance & Regulatory
| RoHS Status | Compliant |
| Moisture Sensitivity Level | MSL 1 |
| ECCN | EAR99 |
| HTS Code | 8542.39.00.90 |
Alternate & Equivalent Parts
Compatible alternatives and drop-in replacements for LM3405AXMK/NOPB:
Frequently Asked Questions
What is the LM3405AXMK/NOPB and what does it do?
The LM3405AXMK/NOPB is a monolithic step-down (buck) constant-current LED driver from Texas Instruments. It regulates LED current up to 1A using an internal MOSFET switch, making it suitable for driving single or series strings of high-brightness LEDs from a 2.7V–5.5V supply rail.
What package and pin count does the LM3405AXMK/NOPB use?
It is available in a 5-pin SOT-23 (SOT-23-5) package. The compact footprint makes it ideal for space-constrained PCB designs in portable and handheld devices. The NOPB suffix confirms it is lead-free and RoHS compliant.
What is the operating temperature range of the LM3405AXMK/NOPB?
The LM3405AXMK/NOPB is rated for an operating temperature range of -40°C to +125°C, making it suitable for both consumer and industrial applications including automotive-grade environments.
How do I set the LED current on the LM3405AXMK/NOPB?
LED current is set by connecting a sense resistor (RSENSE) between the CS pin and ground. The device regulates the voltage across RSENSE to 200mV, so RSENSE = 0.2V / ILED. For example, to drive 500mA, use a 0.4Ω resistor. Refer to the TI datasheet (SNVS602) for full design equations.
What are good alternatives to the LM3405AXMK/NOPB?
Compatible alternatives include the LM3406HV (higher voltage, up to 75V input), the LM3414 (1A LED driver with thermal foldback), and the AP3031 from Diodes Inc. These share similar constant-current LED driver topology but may differ in input voltage range, feature set, and package options.
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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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| 305+ | $0.6624 | $202.03 |
| 395+ | $0.6375 | $251.81 |
| 490+ | $0.6126 | $300.17 |
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