LM26420XMH/NOPB

Voltage Regulators - DC DC Switching Regulators Overview

The LM26420XMH/NOPB is a dual synchronous step-down DC-DC converter from Texas Instruments, designed for automotive applications with AEC-Q100 qualification. It features two independent buck channels, each capable of delivering up to 2A of output current. The device operates with an input voltage range of 3V to 5.5V and provides adjustable output voltages from 800mV to 4.5V. Integrated into a compact 20-pin HTSSOP package with an exposed pad, it supports a fixed switching frequency of 2.2MHz. The regulator includes comprehensive protection features such as overcurrent protection and thermal shutdown, ensuring reliable operation across a junction temperature range of -40°C to +125°C.

Voltage Regulators - DC DC Switching Regulators Feature Summary

• Dual-channel architecture providing independent 2A synchronous buck converters for efficient power distribution in space-constrained designs.
• Automotive-grade reliability certified under AEC-Q100 standards, suitable for demanding environmental conditions and long-term durability.
• High-frequency synchronous rectification enables the use of small external components while maintaining high conversion efficiency across load ranges.

Voltage Regulators - DC DC Switching Regulators Applications

• In-vehicle infotainment systems requiring stable multi-rail power supplies
• Telematics control units needing isolated or separate logic and I/O power domains
• ADAS sensor interfaces requiring low-noise, regulated power for sensitive analog circuits

Voltage Regulators - DC DC Switching Regulators Procurement Notes

Verify the specific suffix against the manufacturer's official documentation to confirm pinout compatibility and electrical specifications. Ensure the ordering part number matches the required package type and temperature grade. Cross-reference the datasheet revision date to validate feature availability and compliance status before finalizing procurement decisions.

Voltage Regulators - DC DC Switching Regulators Selection Notes

Select this component when dual isolated outputs are required within a narrow 3V to 5.5V input window. The 2.2MHz switching frequency allows for smaller inductors compared to lower-frequency alternatives. Consider the HTSSOP-20 footprint for board space optimization. Verify that the total thermal dissipation remains within limits given the 2A per channel capability and ambient operating conditions.

Voltage Regulators - DC DC Switching Regulators Part Context

This device belongs to the LM26420 family of dual synchronous buck regulators. It shares core topology with the LM26420YMHX variant but differs in package configuration. The series targets automotive PMIC applications where high efficiency and compact size are critical. It complements single-channel regulators by offering integrated dual-output solutions without requiring additional controller ICs.

Voltage Regulators - DC DC Switching Regulators Replacement Considerations

LM26420YMHX/NOPB offers identical electrical performance in a different package format. Verify pin-to-pin compatibility if substituting directly on existing PCB layouts. Check datasheet revisions for any changes in recommended external component values or thermal characteristics between package variants.