DATASHEET
ISL91128
High Efficiency Buck-Boost Regulator with 4.5A Switches and I2C Interface
FN8732 Rev.3.00 May 3, 20...
DATASHEET
ISL91128
High Efficiency Buck-Boost Regulator with 4.5A Switches and I2C Interface
FN8732 Rev.3.00 May 3, 2018
The ISL91128 is a high-current, buck-boost switching regulator for systems using new battery chemistries. It uses the Renesas proprietary buck-boost algorithm to maintain
voltage regulation while providing excellent efficiency and very low output
voltage ripple when the input
voltage is close to the output
voltage. The device also includes a selectable Bypass mode for low power consumption in applications that have a Sleep or Low Power mode.
The ISL91128 is capable of delivering at least 2.2A continuous output current (VOUT = 3.3V) across a battery
voltage range of 2.5V to 4.35V. This maximizes the energy utilization of advanced, single-cell Li-ion battery chemistries that have significant capacity left at
voltages below the system
voltage. Its fully synchronous low ON-resistance 4-switch architecture and a low quiescent current of only 30µA optimize efficiency u...