LTC4425IDD#TRPBF

Power Management - Specialized Overview

The LTC4425IDD#TRPBF is a Linear Technology supercapacitor charger featuring an integrated current-limited ideal diode and voltage/current monitoring capabilities. Designed for charging two-cell supercapacitor stacks, it accepts input from Li-Ion/Polymer batteries, USB ports, or regulated supplies ranging from 2.7V to 5.5V. The device operates as an ideal diode with extremely low on-resistance, suitable for high peak-power applications. It provides programmable output voltage regulation in LDO mode or direct pass-through in normal mode with smart inrush current limiting. Internal active balancing ensures equal voltage distribution across cells.

Power Management - Specialized Feature Summary

• Integrates a constant-current/constant-voltage linear charger with an ultra-low resistance ideal diode path
• Includes internal active balancing circuitry to maintain equal voltage across supercapacitor cells without external resistors
• Features a programmable current limit via an external resistor, with the PROG pin providing a voltage proportional to input-to-output current for monitoring

Power Management - Specialized Applications

• Charging two-cell supercapacitor stacks from Li-Ion or Polymer batteries
• Power management systems utilizing USB ports as input sources
• High peak-power applications requiring low average power consumption
• Systems requiring precise current monitoring and inrush current limitation during startup

Power Management - Specialized Procurement Notes

Verify the specific package variant, as the IDD suffix denotes a DFN-12 package. Confirm that the required output voltage clamping (4.9V or 5.4V) aligns with the selected part version. Ensure the application design accounts for the thermal performance of the DFN-12 package under maximum load conditions. Cross-reference the PROG pin resistor requirements for accurate current sensing calibration.

Power Management - Specialized Selection Notes

Select this component when designing circuits that require simultaneous supercapacitor charging and ideal diode rectification in a compact form factor. It is appropriate for battery-backed systems needing rapid energy storage replenishment. Consider the quiescent current specifications for standby power constraints. Verify that the input supply characteristics fall within the specified 2.7V to 5.5V range for optimal operation.

Power Management - Specialized Part Context

This device belongs to the LTC4425 family of supercapacitor chargers. It combines power path management with energy storage conditioning. The IDD#TRPBF designation indicates the DFN-12 package variant supplied in tape and reel format. It serves as a solution for managing energy flow between primary power sources and secondary storage elements in portable and industrial electronics.

Power Management - Specialized Replacement Considerations

No public confirmed substitute part numbers are available in the provided documentation.