LP3947ISD-51

Battery Chargers Overview

The LP3947ISD-51 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 load current capability of 1A. The device operates within an input voltage range of 2.7V to 6V and features a typical dropout voltage of 300mV at full load. It incorporates internal protection mechanisms including thermal shutdown and current limiting. The component is housed in a compact SOT-23-5 surface-mount package, suitable for space-constrained portable applications.

Battery Chargers Feature Summary

• Fixed 5.1V output voltage
• 1A continuous load current
• Low dropout operation
• Integrated thermal and current protection

Battery Chargers Applications

• Portable electronic devices
• Battery-powered systems
• Embedded logic power supplies

Battery Chargers Procurement Notes

Verify the specific suffix '51' confirms the 5.1V fixed output variant. Confirm the 'SD' package designation matches the required SOT-23-5 footprint. Ensure compatibility with the target input voltage range of 2.7V to 6V. Check for RoHS compliance status if required by project specifications.

Battery Chargers Selection Notes

Select this component when a stable 5.1V rail is required from a single-cell lithium or similar battery source. Consider its 1A current limit for moderate load requirements. Evaluate the SOT-23-5 package size against board space constraints. Compare dropout performance against other LDOs if input voltage headroom is minimal.

Battery Chargers Part Context

Part of the LP3947 family of low-power LDO regulators designed for portable electronics. This series offers high PSRR and low noise characteristics. The LP3947ISD-51 specifically targets applications requiring a precise 5.1V output from low-voltage sources.

Battery Chargers Replacement Considerations

Check for pin-compatible alternatives within the LP3947 series offering different fixed voltages. Verify equivalent current and dropout specifications from other manufacturers if supply chain diversification is needed.