LM20144QMHX/NOPB

Voltage Regulators - DC DC Switching Regulators Overview

The LM20144QMHX/NOPB is an automotive-grade synchronous buck regulator from Texas Instruments, designed for high-efficiency power conversion. It operates with an input voltage range of 2.95V to 5.5V and delivers a maximum output current of 4A. The device features adjustable switching frequency and integrates a 30mΩ high-side and 20mΩ low-side MOSFETs. It is housed in a 16-pin HTSSOP package (PWP) and supports operation temperatures from -40°C to +125°C. Key specifications include a minimum output voltage of 0.8V and compliance with AEC-Q100 standards.

Voltage Regulators - DC DC Switching Regulators Feature Summary

• Integrated synchronous rectification with low on-resistance MOSFETs for enhanced efficiency
• Adjustable switching frequency allows optimization for size and performance
• Automotive qualification ensures reliability under harsh environmental conditions
• Current mode control provides fast transient response and inherent cycle-by-cycle overcurrent protection

Voltage Regulators - DC DC Switching Regulators Applications

• On-board DC/DC converters for automotive infotainment systems
• Power distribution units in vehicle electronic control modules
• High-current load regulation for automotive sensors and actuators
• Battery-powered automotive subsystems requiring efficient step-down conversion

Voltage Regulators - DC DC Switching Regulators Procurement Notes

Verify the specific suffix 'MHX' confirms the tape-and-reel packaging format required for automated assembly processes. Confirm that the 'Q' designation aligns with your project's automotive quality requirements and that the HTSSOP-16 footprint matches your PCB layout constraints. Ensure compatibility with your system's input voltage range before finalizing procurement.

Voltage Regulators - DC DC Switching Regulators Selection Notes

Select this component when a compact, high-current solution is needed for 5V automotive bus architectures. The adjustable frequency feature is critical if electromagnetic interference (EMI) needs to be shifted away from sensitive audio or communication bands. Consider the thermal performance of the HTSSOP package relative to your board's copper area and airflow conditions.

Voltage Regulators - DC DC Switching Regulators Part Context

This part belongs to the LM20144-Q1 family of Simple Switcher regulators. It shares architectural similarities with other TI automotive buck converters but is distinct in its specific 4A current rating and 5.5V maximum input limit. It serves as a specialized solution for low-voltage, high-current automotive applications where space and efficiency are paramount.

Voltage Regulators - DC DC Switching Regulators Replacement Considerations

Direct pin-to-pin replacements within the same family may include variants with different fixed output voltages or slightly adjusted current ratings. Verify that any substitute maintains the same HTSSOP-16 package and automotive grade certification to ensure mechanical and reliability compatibility without redesigning the PCB.

Voltage Regulators - DC DC Switching Regulators FAQ

What is the minimum output voltage supported by the LM20144QMHX/NOPB?

The device supports a minimum adjustable output voltage of 0.8V.

Does the LM20144QMHX/NOPB support external synchronization?

No, the datasheet indicates adjustable frequency via an external resistor, but does not list an external sync clock input pin.

What is the typical quiescent current of this regulator?

Specific quiescent current values are detailed in the electrical characteristics table of the official datasheet; general industry estimates should not be used.