LM3153MHE-3.3/NOPB

DC DC Switching Controllers Overview

The LM3153MHE-3.3/NOPB is a PowerWise step-down DC-DC controller IC manufactured by National Semiconductor, now part of Texas Instruments. It features a fixed output voltage of 3.3V and supports a wide input voltage range from 6V to 42V. The device operates at a fixed switching frequency of 750 kHz and includes synchronous rectification for improved efficiency. Key control features include enable functionality and soft start capabilities. The component is housed in a 14-HTSSOP package, designed for surface mount installation.

DC DC Switching Controllers Feature Summary

• Integrated synchronous rectification for enhanced power conversion efficiency
• Wide input voltage tolerance supporting 6V to 42V supply ranges
• Built-in soft start mechanism to limit inrush current during startup
• Fixed 3.3V regulated output with 750 kHz switching frequency

DC DC Switching Controllers Applications

• Industrial control systems requiring stable 3.3V logic supplies
• Automotive electronics operating within wide voltage fluctuations
• Portable devices utilizing battery inputs up to 42V
• Embedded systems needing efficient step-down power regulation

DC DC Switching Controllers Procurement Notes

Verify the manufacturer designation carefully, as National Semiconductor assets were acquired by Texas Instruments. Ensure the ordering suffix matches the specific package variant required for your PCB layout. Confirm that the 3.3V fixed output aligns with your system design needs, as adjustable versions exist within the same family. Cross-reference the datasheet revision date to ensure compatibility with current manufacturing standards.

DC DC Switching Controllers Selection Notes

Choose this component when a fixed 3.3V output is mandatory and input voltages exceed standard LDO limits. The synchronous design offers superior efficiency compared to non-synchronous alternatives at moderate loads. Consider the 750 kHz frequency for balancing component size and electromagnetic interference. Evaluate thermal performance requirements due to the power dissipation inherent in high-step-down ratio applications.

DC DC Switching Controllers Part Context

This part belongs to the LM315x series of SIMPLE SWITCHER controllers, known for compact design and high efficiency. It complements other variants like the LM3150 and LM3153 adjustable models. The series targets applications demanding reliable power management in space-constrained environments. The NOPB suffix indicates lead-free packaging compliant with environmental regulations.

DC DC Switching Controllers Replacement Considerations

Direct substitutes include the LM3153MHX-3.3/NOPB for reel-based assembly. For adjustable output requirements, consider the LM3153MHE/NOPB. Verify pinout compatibility before replacing with generic buck controllers.