LM2840XQMKX/NOPB Texas Instruments Integrated Circuit (SOT23 (6-Pin)) In Stock
The LM2840XQMKX/NOPB is a 100 mA adjustable-output current-mode PWM buck regulator by Texas Instruments with a 4.5 V to 42 V input range in a 6-pin TSOT-23 package. Key specs: up to 42 V input, 100 mA output current, adjustable output voltage. Available from stock with worldwide shipping.
- Manufacturer
- Texas Instruments
- Package
- SOT23 (6-Pin)
- Pin Count
- 6
- Lifecycle
- OBSOLETE
- Datasheet
- LM2840XQMKX/NOPB Datasheet PDF
- Category
- Integrated Circuit
- Temp Range
- -40.0°C to 125.0°C
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
What are the key features of LM2840XQMKX/NOPB?
- Wide 4.5 V to 42 V input range in a 6-pin TSOT-23 package covers industrial 24 V and 36 V bus rails with a single compact device
- Current-mode PWM control at up to 1.25 MHz switching frequency minimizes inductor and capacitor size for ultra-compact step-down designs
- Adjustable output voltage from sub-1 V to near-input range with 100 mA output current serves low-power MCU, sensor, and analog rail generation
What is LM2840XQMKX/NOPB used for?
The LM2840XQMKX/NOPB is suited for generating low-current regulated rails in industrial sensors, building automation nodes, and factory I/O modules powered from 24 V or 36 V supply buses. Its 42 V input tolerance handles field transients common in industrial wiring without additional protection components. The TSOT-23 package and high switching frequency allow extremely compact layouts with a 1 µH inductor and ceramic output capacitor, making it ideal for space-constrained distributed power architectures.
What are the specifications of LM2840XQMKX/NOPB?
| Pbfree Code | No |
| YTEOL | 0 |
| Analog IC - Other Type | SWITCHING REGULATOR |
| Control Mode | CURRENT-MODE |
| Control Technique | PULSE WIDTH MODULATION |
| Input Voltage-Max | 42V |
| Input Voltage-Min | 4.5V |
| Input Voltage-Nom | 12V |
| JESD-30 Code | R-PDSO-G6 |
| JESD-609 Code | e3 |
| Number of Functions | 1 |
| Output Current-Max | 0.9A |
| Package Body Material | PLASTIC/EPOXY |
| Package Equivalence Code | TSOP6,.11,37 |
| Package Shape | RECTANGULAR |
| Package Style | SMALL OUTLINE, THIN PROFILE, SHRINK PITCH |
| Peak Reflow Temperature (Cel) | 260 |
| Qualification Status | Not Qualified |
| Surface Mount | YES |
| Switcher Configuration | BUCK |
| Switching Frequency-Max | 750kHz |
| Technology | BICMOS |
| Temperature Grade | AUTOMOTIVE |
| Terminal Finish | MATTE TIN |
| Terminal Form | GULL WING |
| Terminal Pitch | 0.95mm |
| Terminal Position | DUAL |
| Time@Peak Reflow Temperature-Max (s) | 30 |
| Package | SOT23 (6-Pin) |
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
| Moisture Sensitivity Level | MSL 1 |
| ECCN | EAR99 |
| HTS Code | 8542.39.00.60 |
Where can I find the LM2840XQMKX/NOPB datasheet?
LM2840XQMKX/NOPB Datasheet DownloadOfficial datasheet from Texas Instruments
What are equivalent replacements for LM2840XQMKX/NOPB?
No known alternates. Submit an RFQ and our team can suggest alternatives.
Frequently Asked Questions
What is the maximum input voltage of the LM2840XQMKX/NOPB and why does it matter for industrial 24 V systems?
The LM2840XQMKX/NOPB accepts input voltages up to 42 V, which provides headroom above the 24 V and 36 V nominal bus voltages used in industrial PLCs, factory sensors, and building automation equipment. Inductive load switching and cable inductance routinely produce transients 10–20 V above nominal, so the 42 V rating avoids the need for external TVS diodes or overvoltage clamping circuits in most standard industrial installations.
How much output current does the LM2840XQMKX/NOPB deliver and what loads is it suited for?
The LM2840XQMKX/NOPB supplies up to 100 mA of continuous output current, sufficient for powering microcontrollers consuming 50–80 mA, low-power wireless modules, operational amplifiers, MEMS sensors, and logic ICs in distributed sensing nodes. For loads exceeding 100 mA, a higher-current alternative such as the LM2841 or LM2842 in the same package family would be more appropriate.
What switching frequency does the LM2840XQMKX/NOPB operate at, and how does that affect the inductor selection?
The LM2840XQMKX/NOPB switches at approximately 1.25 MHz internally, allowing the use of a small 1 µH to 4.7 µH inductor compared to the 10–47 µH values required at 200–500 kHz. A 1.25 MHz design fits an 0402 or 0603 SMD inductor with only a few ceramic output capacitors, keeping the total solution footprint under 20 mm²—critical for the compact boards used in IoT gateway modules and sensor transmitters powered from industrial rails.
Is the LM2840XQMKX/NOPB RoHS-compliant, and what should procurement teams check before ordering?
The LM2840XQMKX/NOPB carries a JESD-609 code of e3, indicating a tin-lead (SnPb) solder finish, which is not RoHS-compliant. The NOPB suffix in TI's naming convention typically denotes lead-free, but the actual JESD code should be verified on the current datasheet or product page before ordering for RoHS-restricted shipments. For fully lead-free assembly, procurement teams should confirm availability of the e4-coded variant or request RoHS-compliant lot documentation from the distributor, particularly given the YTEOL of 0 which signals potential near-term obsolescence.
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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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