LP3947ISDX-51/NOPB

Battery Chargers Overview

The LP3947ISDX-51/NOPB is a fixed-output low-dropout (LDO) voltage regulator manufactured by Texas Instruments. It provides a fixed output voltage of 5.1V with a maximum continuous output current of 200mA. The device features a typical dropout voltage of 200mV at full load and operates with a quiescent current of 60µA. It supports an input voltage range up to 16V and includes built-in protection functions such as thermal shutdown, reverse battery protection, and current limiting. The component is housed in a surface-mount TO-263 (DDPAK-5) package.

Battery Chargers Feature Summary

• Fixed 5.1V output voltage for stable power supply applications
• Integrated thermal shutdown and reverse battery protection mechanisms
• Low quiescent current consumption for efficient power management
• High power dissipation capability via exposed pad thermal design

Battery Chargers Applications

• Portable electronic devices requiring regulated 5V logic supplies
• Battery-powered systems needing efficient linear regulation
• Embedded microcontroller power rails
• Industrial control modules with wide input voltage ranges

Battery Chargers Procurement Notes

Verify the complete part number including the suffix /NOPB to ensure lead-free compliance and specific output voltage variant. Confirm package type matches TO-263 (DDPAK-5) requirements for your PCB layout. Check datasheet for thermal resistance values if high-power operation is expected. Ensure input voltage does not exceed the 16V absolute maximum rating during transient conditions.

Battery Chargers Selection Notes

Select this component when a fixed 5.1V output is required rather than standard 5.0V. Consider the 200mA current limit against peak load demands. Evaluate the dropout voltage performance relative to your minimum input voltage. Compare thermal performance in your enclosure against alternative packages like SOT-223 if space is constrained.

Battery Chargers Part Context

This part belongs to the LP394x family of LDO regulators from Texas Instruments. It shares architectural similarities with other members like the LP3947ISX series but differs in output voltage configuration. The 'ISDX' designation indicates the industrial temperature grade and specific package style. It complements adjustable variants within the same product line for diverse system voltage requirements.

Battery Chargers Replacement Considerations

Direct substitutes include other LP3947 variants with compatible output voltages and packages. Cross-reference pinouts and thermal characteristics before substitution. Verify that alternative parts meet the same 16V input and 200mA output specifications.