LM2840YQMK/NOPB

Voltage Regulators - DC DC Switching Regulators Overview

The LM2840YQMK/NOPB is an automotive-grade step-down DC/DC regulator from the SIMPLE SWITCHER family. It operates with a 4.5 V to 42 V input range and delivers up to 300 mA output current. The device integrates a 1.25 MHz fixed-frequency switch, enabling compact designs using small surface-mount components. It features adjustable output voltage capability, internal soft-start, and comprehensive protection mechanisms including overcurrent limiting and thermal shutdown. Packaged in a thin SOT-23-6 form factor, it supports operation across extended temperature ranges suitable for automotive applications.

Voltage Regulators - DC DC Switching Regulators Feature Summary

• Automotive-grade reliability compliant with AEC-Q100 standards
• Integrated high-frequency switching for reduced external component size
• Adjustable output voltage configuration via external resistors
• Built-in thermal shutdown and cycle-by-cycle current limiting

Voltage Regulators - DC DC Switching Regulators Applications

• Automotive infotainment system power distribution
• On-board telematics unit voltage regulation
• Industrial control module power supplies
• General-purpose 42V to lower voltage conversion systems

Voltage Regulators - DC DC Switching Regulators Procurement Notes

Verify that the specific suffix 'Q' confirms AEC-Q100 automotive qualification status. Ensure the package marking matches the thin SOT-23-6 outline drawing. Confirm RoHS compliance documentation aligns with project requirements. Cross-reference the manufacturer part number against official Texas Instruments databases to avoid counterfeit components. Validate that the operating temperature range meets the specific environmental constraints of the target application.

Voltage Regulators - DC DC Switching Regulators Selection Notes

Select this component when designing for automotive environments requiring robust voltage regulation from high-voltage rails. The 300 mA output current suits low-to-moderate power loads where space constraints necessitate a thin package. Consider the 1.25 MHz switching frequency for balancing efficiency and EMI performance. Evaluate the need for adjustable outputs versus fixed variants based on system voltage requirements. Ensure adequate thermal management strategies are integrated due to the small package footprint.

Voltage Regulators - DC DC Switching Regulators Part Context

This part belongs to the LM284x series of SIMPLE SWITCHER regulators, designed for high-efficiency step-down applications. The LM2840 variant specifically provides 300 mA output capability, distinguishing it from the 100 mA (LM2841) and 600 mA (LM2842) counterparts within the same family. The 'Q' designation indicates automotive qualification, while 'NOPB' signifies lead-free and halogen-free construction. This series emphasizes simplicity in design with minimal external component count.

Voltage Regulators - DC DC Switching Regulators Replacement Considerations

LM2841YQMK/NOPB offers 100 mA output; LM2842YQMK/NOPB provides 600 mA output. Both share the same package and pinout but differ in current capacity. Verify thermal performance and inductor selection when substituting between these current-rated variants within the LM284x family.