LS0502SCD33

Overview

The Littelfuse LS0502SCD33 is a supercapacitor protection IC designed for backup power applications. It operates within a system voltage range of 2.5 V to 5.5 V and supports an input rating of 18 V with overvoltage protection. The device features a DFN-10 package and functions across a temperature range of -40°C to +125°C junction temperature, with an operating range of -40°C to +85°C. Key electrical parameters include a quiescent current of 650 µA during operation and 2.5 µA in standby mode. It provides a maximum discharge current of 2 A and integrates a linear charger capable of up to 300 mA charging current.

Feature Summary

• Integrates input overvoltage and overcurrent protection circuits alongside a reverse blocking switch.
• Includes a supercapacitor charging control circuit with programmable voltage and current thresholds.
• Features built-in battery balancing functionality to maintain equal voltage levels across storage elements.
• Maintains ultra-low static current consumption while keeping supercapacitors in a ready state.

Applications

• Backup power systems utilizing supercapacitors or capacitor banks
• Handheld industrial equipment requiring reliable power retention
• Dash cameras and portable recording devices
• Internet of Things (IoT) nodes with intermittent power sources
• Smart metering applications with removable battery options

Procurement Notes

Verify the specific suffix designation when ordering, as variations such as LS0502SCD33S may exist within the product family. Confirm that the required packaging format, such as cut tape or reel, aligns with manufacturing capabilities. Ensure the selected component meets RoHS compliance requirements for the target market. Cross-reference the datasheet specifications against the bill of materials to confirm compatibility with the intended system voltage and thermal constraints before finalizing procurement.

Selection Notes

Select this component for designs requiring integrated protection and charging management for single-cell supercapacitor backups. The device is suitable for space-constrained applications due to its compact DFN-10 footprint. Consider the programmable thresholds for input current limit and charging voltage to match specific supercapacitor characteristics. Evaluate the thermal performance given the maximum power dissipation and operating temperature range to ensure reliability under varying environmental conditions.

Part Context

Littelfuse manufactures a broad portfolio of circuit protection and power management solutions. The LS0502SCD33 belongs to the supercapacitor protection IC series, which addresses the growing demand for reliable energy storage in IoT and industrial sectors. This component complements other power management devices by providing specialized protection for non-volatile memory and real-time clock backups powered by capacitive storage rather than traditional batteries.

Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided documentation. Verify functional equivalence with other supercapacitor protection ICs from different manufacturers if sourcing constraints require alternative components. Ensure any replacement matches the pinout configuration, voltage ratings, and package dimensions to facilitate direct integration without PCB redesign.

FAQ

What is the maximum discharge current capability of the LS0502SCD33?

The device supports a maximum discharge current of 2 A through its integrated reverse blocking switch.

How does the LS0502SCD33 manage multiple supercapacitors?

It includes a built-in battery balancing circuit that monitors cell voltages and maintains them at the same level during charging.

What is the standby current consumption when the supercapacitors are fully charged?

The circuit consumes only 2.5 µA of current while maintaining the supercapacitors in a ready state.