LM2842XQMKX/NOPB

Voltage Regulators - DC DC Switching Regulators Overview

The LM2842XQMKX/NOPB is a SIMPLE SWITCHER step-down regulator from Texas Instruments, designed for automotive and industrial applications. It operates with an input voltage range of 4.5 V to 42 V and delivers up to 0.6 A output current. The device integrates a high-side N-channel MOSFET and features a fixed switching frequency of 550 kHz. It is housed in a thin SOT-23-6 package (MKX) and supports an operating temperature range from -40°C to +125°C. The component includes internal compensation, soft-start, and protection features such as cycle-by-cycle current limiting and thermal shutdown.

Voltage Regulators - DC DC Switching Regulators Feature Summary

• Integrated high-side N-channel power switch eliminates external inductor and diode requirements for simplified design.
• Fixed 550 kHz switching frequency allows the use of small passive components to minimize solution size.
• Internal frequency compensation reduces external component count and simplifies layout.
• Comprehensive protection mechanisms include cycle-by-cycle current limiting, thermal shutdown, and undervoltage lockout.

Voltage Regulators - DC DC Switching Regulators Applications

• Automotive infotainment and body control modules
• Industrial DC/DC conversion for sensors and controllers
• Point-of-load regulation in compact electronic systems

Voltage Regulators - DC DC Switching Regulators Procurement Notes

Verify the complete part number including suffixes such as NOPB and MKX to ensure correct packaging and lead-free status. Confirm that the specific variant matches the required automotive qualification standards if applicable. Cross-reference the manufacturer's official datasheet for the latest mechanical dimensions and electrical specifications before finalizing procurement orders.

Voltage Regulators - DC DC Switching Regulators Selection Notes

Select this component when a compact buck converter is needed for inputs up to 42 V with moderate current demands. The fixed 550 kHz frequency is suitable for applications prioritizing board space over ultra-low noise. Ensure the load current does not exceed the 0.6 A limit and that the ambient temperature remains within the specified -40°C to +125°C range for reliable operation.

Voltage Regulators - DC DC Switching Regulators Part Context

This device belongs to the LM2842 family of SIMPLE SWITCHER regulators, which are characterized by their ease of use and small footprint. The family includes variants with different output currents and packages, such as the LM2841 and LM2842 non-Q1 versions. The XQ suffix indicates automotive qualification, while MKX denotes the thin SOT-23-6 package type used in this specific part number.

Voltage Regulators - DC DC Switching Regulators Replacement Considerations

Direct substitutes include LM2842XQMK/NOPB and LM2842XMKX/NOPB. Verify pin compatibility and electrical parameters against the original datasheet. Alternative packages like SOIC or DFN may require schematic and PCB layout modifications.