ISL9305IRTWCNLZ-T

Overview

The ISL9305IRTWCNLZ-T is a mini-PMIC integrating two 800mA synchronous step-down converters and two low-input LDOs. It supports I2C programmable output voltages, with DC/DC ranges of 0.8V to VIN and LDOs from 0.9V to 3.3V. The device operates at a 3MHz switching frequency, accepts input voltages from 1.5V to 5.5V, and features typical quiescent currents of 50μA in skip mode for DC/DCs and 20μA per enabled LDO. It is housed in a 16-TQFN (4x4) package.

Feature Summary

• Integrates dual high-efficiency synchronous buck converters and dual low-dropout linear regulators within a single compact package.
• Enables on-the-fly I2C programming for adjustable DC/DC output voltages and fixed LDO outputs with defined step resolutions.
• Supports configurable operating modes including light-load skip mode and forced PWM for optimized efficiency across load conditions.

Applications

• Powering multiple voltage rails in cellular phones and smart phones
• Supplying low-voltage microprocessors in PDAs and portable media players
• Battery-powered portable instruments using single Li-ion or Li-Polymer sources

Procurement Notes

Verify the specific suffix 'WCN' against official Renesas documentation to confirm exact pinout, thermal pad configuration, and RoHS compliance status. Confirm current lifecycle status as this part number may be discontinued or superseded by newer revisions. Ensure the ordering code matches the required tape-and-reel quantity specifications.

Selection Notes

Select this component when designing systems requiring four distinct regulated rails from a single battery source. Prioritize this IC for space-constrained mobile applications needing integrated buck and LDO regulation. Consider the 3MHz switching frequency for smaller external passive components compared to lower-frequency alternatives.

Part Context

This part belongs to the ISL9305 family of mini-PMICs designed for portable electronics. It consolidates power management functions typically requiring multiple discrete components into a single small footprint. The series is characterized by high integration and I2C controllability for dynamic power optimization.

Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation. Verify compatibility with existing BOM and layout constraints if considering alternative PMIC families.