ISL9238IRTZ-T

Overview

The ISL9238IRTZ-T is a battery management integrated circuit designed for notebook and tablet applications. It supports lithium-ion and lithium-polymer batteries with an operating supply voltage range of 3.2 V to 23.4 V. The device regulates the battery charge voltage between 2.4 V and 18.304 V in 8 mV adjustment steps, maintaining a maximum charging voltage accuracy of ±1.1% or ±0.5%. It features a charge current limit accuracy of ±2%, supporting up to 4 A with a CSOP-CSON threshold of 60 mV. Trickle charge currents are selectable at 64 mA, 128 mA, 256 mA, or 512 mA. The component is housed in a TQFN-32 package measuring 4.0 x 4.0 mm.

Feature Summary

• Integrated buck-boost topology suitable for single-cell to multi-cell battery configurations
• Programmable charge voltage and current limits with high precision regulation
• Supports multiple trickle charge current options for safe battery maintenance
• Designed for USB Type-C portable devices requiring power sink charger functionality

Applications

• Notebook battery chargers
• Tablet computers
• Ultrabooks
• Power banks
• USB-C interface portable devices

Procurement Notes

Verify the specific suffix 'T' indicates tape-and-reel packaging when ordering. Confirm compatibility with the intended battery cell count and required charge current specifications against the official datasheet. Ensure the design accounts for the specified operating temperature range and humidity sensitivity class during assembly. Cross-reference the manufacturer part number with Renesas Electronics documentation to confirm current production status and availability.

Selection Notes

Select this component for systems requiring a compact solution for managing lithium-based batteries in portable electronics. The wide input voltage range accommodates various USB Power Delivery profiles. Consider the thermal performance within the TQFN-32 package relative to the expected load current. Verify that the required charge voltage resolution and accuracy meet the specific battery chemistry requirements of the target application.

Part Context

This part belongs to the ISL9238 series of battery management ICs from Renesas Electronics. It is functionally related to variants such as the ISL9238AIRTZ-T and ISL9238AHRTZ, differing primarily in packaging and minor electrical characteristics. The series is engineered for modern mobile computing platforms, integrating power path management and charging control into a single small-footprint device.

Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided source material.