LP3947ISD-51/NOPB

Battery Chargers Overview

The LP3947ISD-51/NOPB is a low-dropout (LDO) voltage regulator manufactured by Texas Instruments. It provides a fixed output voltage of 5.1V with a maximum load current capability of 1A. The device operates within an input voltage range of 2.7V to 6V and maintains regulation with a typical dropout voltage of 300mV at full load. It features a quiescent current of 80µA and includes integrated protection mechanisms such as thermal shutdown and current limiting. The component is housed in a compact WSON-8 package, suitable for space-constrained portable applications.

Battery Chargers Feature Summary

• Fixed 5.1V output voltage eliminates external resistor requirements
• Integrated thermal shutdown and current limit protection
• Low quiescent current for extended battery life
• Compact WSON-8 package for space-efficient designs

Battery Chargers Applications

• Portable electronic devices requiring stable 5V logic supplies
• Battery-powered systems with input voltages up to 6V
• Embedded systems needing regulated power for microcontrollers
• Consumer electronics with strict size constraints

Battery Chargers Procurement Notes

Verify the complete part number including the suffix /NOPB to ensure lead-free compliance and specific tape-and-reel packaging configuration. Confirm that the fixed 5.1V output aligns with system voltage requirements, as adjustable variants exist within the same family. Check datasheet specifications for thermal performance under expected load conditions to ensure adequate heat dissipation in the chosen enclosure.

Battery Chargers Selection Notes

Select this component when a fixed 5.1V output is required rather than an adjustable version. Ensure the input voltage remains above 2.7V and does not exceed 6V. Consider the WSON-8 package thermal characteristics if operating near maximum load current. Verify that the 1A current rating meets peak demand without exceeding thermal limits.

Battery Chargers Part Context

This LDO belongs to the LP3947 series, designed for low-power portable applications. It offers higher efficiency compared to older linear regulators due to its low dropout voltage and quiescent current. The series supports various fixed output voltages, with the 5.1V variant serving specific logic level requirements in mixed-voltage systems.

Battery Chargers Replacement Considerations

Direct replacements include other LP3947 variants with different fixed output voltages if system voltage allows. Cross-reference with LP3947IMX-5.0/NOPB for identical functionality in SOIC-8 package. Verify pin compatibility and thermal performance before substituting with generic 1A LDOs.