LM2840XQMK/NOPB

Voltage Regulators - DC DC Switching Regulators Overview

The LM2840XQMK/NOPB is a step-down DC/DC regulator from Texas Instruments, rated for up to 100 mA output current. It operates with an input voltage range of 3.5 V to 42 V and supports adjustable output voltages down to 0.765 V. The device integrates a fixed 550 kHz switching frequency and functions within an extended junction temperature range of -40°C to +125°C. Packaged in a thin SOT-23-6 (TSOT-23-6) case, it is designed for space-constrained automotive and industrial applications requiring reliable power conversion.

Voltage Regulators - DC DC Switching Regulators Feature Summary

• Integrated synchronous rectification is not present; the device utilizes a non-synchronous buck topology for efficient step-down regulation.
• Fixed internal switching frequency eliminates the need for external timing components, simplifying circuit design and reducing board space requirements.
• Capable of handling high input voltages up to 42 V, making it suitable for noisy automotive environments and industrial bus systems.

Voltage Regulators - DC DC Switching Regulators Applications

• Automotive infotainment and instrument cluster power supplies
• Industrial sensor node power regulation
• Point-of-load conversion for microcontrollers and FPGAs

Voltage Regulators - DC DC Switching Regulators Procurement Notes

Verify the specific suffix 'XQMK' corresponds to the tape-and-reel packaging configuration required for your assembly line. Confirm that the 'NOPB' designation ensures lead-free and RoHS compliance as per the manufacturer's latest environmental declarations. Cross-reference the datasheet revision date to ensure compatibility with your design specifications.

Voltage Regulators - DC DC Switching Regulators Selection Notes

Select this component when a compact solution is needed for high-voltage step-down applications with moderate current demands. It is appropriate for designs where a fixed switching frequency is preferred to simplify EMI filtering. Consider alternative models if higher output currents or synchronous operation are required for improved efficiency at light loads.

Voltage Regulators - DC DC Switching Regulators Part Context

This part belongs to the LM284x-Q1 family of SIMPLE SWITCHER regulators, which includes variants with different current ratings such as the LM2841 (300 mA) and LM2842 (600 mA). All members share similar pinouts and control architectures but differ in thermal performance and maximum output current capabilities. The family is qualified for automotive applications under AEC-Q100 standards.

Voltage Regulators - DC DC Switching Regulators Replacement Considerations

Direct functional substitutes within the same package include the LM2841XQMK/NOPB and LM2842XQMK/NOPB for higher current needs. For non-automotive grade equivalents, verify electrical parameter compatibility carefully. Ensure any replacement maintains the 42 V input rating and SOT-23-6 footprint.