Renesas ISL6292-2CR3Z

Overview

ISL6292-2CR3Z from Renesas Electronics is a single-cell Li-ion/Li-polymer linear battery charger IC in a 10-lead 3×3 mm DFN package, supporting CC/CV charging up to 1.6 A, delivering 4.20 V ±1% regulated output voltage, and featuring NTC-based temperature monitoring, charge current thermal foldback, and USB/adapter input compatibility.

For engineers reviewing the ISL6292-2CR3Z datasheet, ISL6292-2CR3Z pinout, ISL6292-2CR3Z application, or ISL6292-2CR3Z equivalent, this page provides verified technical context, real-world design meaning for key specs, validated pin functions, confirmed alternative parts with documented differences, and supply-ready availability details - all specific to the ISL6292-2CR3Z variant.

Technical Context

The ISL6292-2CR3Z operates as a linear charger with integrated pass MOSFET and current-sense architecture, using a 100,000:1 current mirror (QMAIN:QSEN) to scale IREF-programmed reference current into full charge current. Its CC/CV profile begins with 10% preconditioning (trickle mode) until VBAT ≥ 2.8 V for 15 oscillator cycles.

Thermal foldback activates at 100°C (±15°C), reducing charge current at 100 mA/°C to prevent junction exceedance of +150°C; the TEMP pin interfaces directly with an external NTC thermistor for ±2°C battery temperature window control, while the TOEN pin is unconnected (N/A) in the 3×3 DFN package per datasheet Figure 2 and Pin Descriptions.

Key Specifications

Pinout & Package

ISL6292-2CR3Z uses a thermally enhanced 10-lead 3×3 mm DFN package (RoHS-compliant, exposed pad) with θJA = 46°C/W. The TOEN pin is not bonded and must be left unconnected; IMIN is internally tied to V2P8.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar single-cell Li-ion linear charger applications.

Compared with BQ24075RGER and MP2617GQSE-Z, the ISL6292-2CR3Z uniquely combines 1% voltage accuracy, thermal foldback, NTC interface, and fully programmable TIMEOUT/IMIN in a 3×3 mm DFN - making it optimal for thermally sensitive, safety-certified, and adapter-flexible portable designs.

Availability

ISL6292-2CR3Z is available at Aetrix Electronics and suitable for portable medical handhelds, smartphones, USB-powered instruments, and self-charging battery packs requiring stable component supply, RoHS compliance, and long-term lifecycle support.

Supply support for ISL6292-2CR3Z includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Renesas Electronics is a global semiconductor leader specializing in microcontrollers, analog power, and battery management solutions for industrial, automotive, and consumer markets.

The ISL6292 product line delivers highly integrated, thermally robust linear chargers for space-constrained Li-ion applications - designed specifically for USB/adapter dual-input portability and medical-grade safety compliance.

FAQ

What is the exact charge voltage accuracy of the ISL6292-2CR3Z?

The ISL6292-2CR3Z delivers a nominal 4.20 V output with ±1% tolerance over the full operating range (−20°C to +70°C, 4.3 V to 6.5 V input). This is confirmed in the Electrical Specifications table on page 6 of FN9105 Rev.10.00, where VCH for ISL6292-2 is specified as 4.158 V (min) to 4.242 V (max), centered at 4.20 V - ensuring safe, full-capacity charging of single-cell Li-ion batteries without overvoltage risk. The ISL6292-2CR3Z achieves this via factory-trimmed internal references and low-drift amplifier design.

Does the ISL6292-2CR3Z support USB current-limited input operation?

Yes, the ISL6292-2CR3Z explicitly supports USB current-limited input operation. As detailed in the Theory of Operation (page 11), it adapts its behavior: when driven by a current-limited adapter (e.g., USB 500 mA), the main MOSFET operates in switch mode rather than linear regulation, drastically reducing power dissipation. The datasheet confirms guaranteed operation down to 2.65 V after start-up and specifies IREF programming modes for USB 100 mA and 500 mA compliance. This dual-mode capability is intrinsic to the ISL6292-2CR3Z architecture.

How is the end-of-charge (EOC) current set on the ISL6292-2CR3Z?

On the ISL6292-2CR3Z, the end-of-charge (EOC) current is fixed to 1/10 of the programmed constant charge current (IREF), because the IMIN pin is internally bonded to V2P8 per the Ordering Information and Pin Descriptions (pages 4 and 5). Unlike QFN variants, no external RIMIN resistor is used or required. For example, with RIREF = 80 kΩ setting ~1.0 A charge current, IMIN defaults to ~100 mA - matching the typical value in the Electrical Specifications table (page 6). This simplifies design and eliminates calibration error.

What is the thermal performance difference between the ISL6292-2CR3Z and larger-package variants?

The ISL6292-2CR3Z uses a 3×3 mm DFN package with θJA = 46°C/W (vs. 41°C/W for 4×4 QFN and 34°C/W for 5×5 QFN), resulting in higher junction temperature rise under identical load. Its absolute max charge current is rated at 1.6 A (vs. 2.1 A for QFN packages), and dropout voltage is higher (175 mV at 0.5 A vs. 140 mV). These deratings are explicitly stated in the Absolute Maximum Ratings and Electrical Specifications tables (page 6), reflecting thermal limitations inherent to the smaller footprint - critical for thermal design validation.

Is the TOEN pin functional on the ISL6292-2CR3Z?

No, the TOEN pin is not functional on the ISL6292-2CR3Z. Per the Pin Descriptions (page 5) and Block Diagram note (page 3), "For the 3x3 DFN package, the TOEN pin is left floating and the IMIN pin is connected to the V2P8 pin internally." The pin exists physically (Pin 6 on 4×4/5×5 packages) but is unconnected in the 3×3 DFN die assembly. Therefore, TIMEOUT disable functionality is unavailable on ISL6292-2CR3Z - the safety timer remains always enabled, with duration set solely by CTIME.