LM3405AXMK/NOPB Texas Instruments power-management (SOT-23-5) In Stock
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:
1A step-down LED driver, similar input voltage range and SOT-23 package, pin-compatible alternative
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.
Related Guides
1206 100 uF MLCC Design Guide for Compact Bulk Decoupling
Design guidance for applying CL31A107MQHNNNE and related 1206 MLCCs in compact bulk decoupling networks.
Jul 3, 2026
0402 10 nF MLCC Design Guide for High-Speed Decoupling
Practical design guidance for using CL05B103KB5NNNC and related 0402 MLCCs in high-speed decoupling networks.
Jul 3, 2026
CL31A107MQHNNNE 1206 100 uF MLCC Selection Guide
How to choose CL31A107MQHNNNE and related 1206 MLCCs for low-voltage bulk capacitance and regulator stability.
Jul 2, 2026
CL05B103KB5NNNC 0402 10 nF X7R MLCC Selection Guide
How to choose CL05B103KB5NNNC and related 0402 MLCCs for bypassing, filtering, voltage derating, and sourcing.
Jul 2, 2026
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.
| Qty. | Unit Price | Ext. Price |
|---|---|---|
| 305+ | $0.6624 | $202.03 |
| 395+ | $0.6375 | $251.81 |
| 490+ | $0.6126 | $300.17 |
In Stock · 24h Response · Worldwide Shipping
Response within 24 hours · Worldwide shipping
“The anti-counterfeit verification gave us confidence we'd never had with other China suppliers.”