LTC3104EMSE#PBF

Overview

The LTC3104EMSE#PBF is a high-efficiency, synchronous step-down DC/DC converter designed for energy harvesting applications. It features an ultra-low start-up voltage of 20mV and operates with input voltages as low as 50mV. The device integrates a boost pre-regulator to maintain regulation from very low source voltages. It supports output currents up to 1A with external components and includes programmable soft-start and frequency settings. The converter utilizes a fixed 1.2MHz switching frequency to minimize passive component size while maintaining high efficiency across varying load conditions.

Feature Summary

• Ultra-low start-up voltage capability enabling operation from minimal energy sources
• Integrated boost pre-regulator extends operating range from sub-50mV inputs
• Synchronous rectification architecture ensures high conversion efficiency
• Fixed high-frequency switching reduces required inductor and capacitor values

Applications

• Energy harvesting systems utilizing thermoelectric generators
• Piezoelectric vibration energy harvesters
• Low-voltage battery charging circuits
• Wireless sensor node power management

Procurement Notes

Verify the specific suffix PBF indicates lead-free compliance when ordering. Confirm the EMSE package type matches your PCB footprint requirements. Ensure input voltage ranges align with your energy source characteristics before procurement. Check for updated datasheet revisions to confirm pinout and electrical specifications remain consistent with your design.

Selection Notes

Select this component when input voltages are exceptionally low, below typical buck converter thresholds. Consider the integrated boost stage if the source voltage may dip below 50mV during operation. Evaluate thermal performance under maximum load conditions due to the compact MSOP-10 package. Verify that the fixed 1.2MHz frequency suits your electromagnetic interference constraints and passive component availability.

Part Context

This part belongs to Analog Devices' LTC310x family of energy harvesting converters. It shares architectural similarities with the LTC3108 but offers different current capabilities and control interfaces. The EMSE designation refers to the 10-lead MSOP package variant. This series targets applications requiring power extraction from ambient energy sources where traditional regulators fail to start.

Replacement Considerations

The LTC3104EMS#PBF is a non-leaded equivalent without the PBF suffix, functionally identical. Cross-reference with LTC3108 for higher current needs, though interface differences exist. No direct single-pin replacements are publicly confirmed; redesign may be necessary for alternative parts.