LM2771SDX

Voltage Regulators - DC DC Switching Regulators Overview

The LM2771SDX is a low-ripple, 250mA switched-capacitor step-down DC/DC converter manufactured by Texas Instruments. It operates as an inductorless charge pump with a fixed 1.5V output voltage. The device supports an input voltage range from 2.7V to 5.5V and features adjustable current limiting. It is housed in a 10-WSON package and is rated for an operating temperature range of -30°C to 110°C.

Voltage Regulators - DC DC Switching Regulators Feature Summary

• Inductorless charge pump topology eliminates the need for external inductors
• Low-ripple output capability suitable for noise-sensitive applications
• Adjustable current limit protects against overload conditions

Voltage Regulators - DC DC Switching Regulators Applications

• Portable battery-powered devices requiring compact power solutions
• Systems needing inductorless step-down conversion
• Noise-sensitive circuits requiring low ripple voltage

Voltage Regulators - DC DC Switching Regulators Procurement Notes

Verify the specific suffix 'SDX' corresponds to the tape-and-reel packaging variant when ordering. Confirm that the fixed 1.5V output meets system requirements, as this model does not offer programmable voltage options. Ensure the 250mA output current capacity aligns with load demands. Check for RoHS compliance status if required by project specifications.

Voltage Regulators - DC DC Switching Regulators Selection Notes

Select this component when space constraints prohibit the use of inductors in a step-down application. It is suitable for designs requiring a fixed 1.5V rail from a 2.7V to 5.5V input source. Consider the 250mA current limit and the -30°C to 110°C temperature range during thermal design. Compare with other TI charge pumps if different output voltages or higher currents are needed.

Voltage Regulators - DC DC Switching Regulators Part Context

The LM2771 belongs to Texas Instruments' family of switched-capacitor voltage regulators. These devices provide efficient step-down conversion without magnetic components. The SDX designation indicates a specific reel configuration within the product line, distinct from tube-packaged variants like the LM2771CD.

Voltage Regulators - DC DC Switching Regulators Replacement Considerations

The LM2771SD/NOPB serves as a direct functional equivalent in tube packaging. Other variants such as LM2771SDX/NOPB may offer identical electrical performance with updated environmental compliance markings. Verify pin compatibility and package dimensions before substitution.