ISL9519HRTZ-T

Overview

The ISL9519HRTZ-T is a narrow VDC regulator and battery charger controller manufactured by Renesas Electronics Corporation. It operates with an adapter voltage range of +4.5V to +22V and supports lithium-ion battery chemistries for 1, 2, or 3-cell configurations. The device features an SMBus 2-wire serial interface for programmable parameters, including system voltage accuracy of ±0.5% and input current limit accuracy of ±3%. It provides over 8A battery charger current and over 8A adapter current capability. The component is housed in a 28-TQFN (4x4) package with exposed pad and operates within a temperature range of -10°C to +100°C.

Feature Summary

• Integrates narrow VDC regulation with battery charging control for systems powered by either the battery pack or the regulator output.
• Features a patented trickle charge system that maintains minimum system voltage while charging deeply discharged batteries.
• Supports variable switching frequency at light loads for higher efficiency and fixed frequency operation at higher loads.
• Includes automatic adapter in-rush FET control and isolation FET control capabilities.

Applications

• Narrow VDC notebook battery chargers
• Systems requiring simultaneous power delivery and battery charging from a single source
• Applications utilizing SMBus for parameter programming and monitoring

Procurement Notes

The ISL9519HRTZ-T is marked as obsolete and not recommended for new designs. Availability is restricted, and sourcing may require checking secondary market channels or contacting distributors directly for existing stock verification. Ensure compliance with RoHS standards if applicable to the specific revision obtained.

Selection Notes

Select this component for applications requiring integrated narrow VDC regulation and battery charging in a compact footprint. Verify compatibility with the required cell count (1-3 cells) and ensure the system design accommodates the SMBus interface for configuration. Consider the obsolete status when planning long-term production lifecycles.

Part Context

The ISL9519 belongs to the Intersil/Renesas portfolio of power management ICs designed for portable computing. It serves as a specialized solution for managing power distribution between the AC adapter and the battery pack, ensuring system stability during load transients and battery depletion events.

Replacement Considerations

The official replacement noted for the ISL9519 series is the ISL95522A, which offers similar hybrid power bus and narrow voltage DC combined battery pack charger functionality.