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 under all load conditions.
The ISL91128 supports a broader set of programmable features that can be accessed using an I2 C bus interface. With a programmable output voltage range of 1.9V to 5.0V, the ISL91128 is ideal for applications requiring dynamically changing supply voltages. A programmable slew rate can be selected to provide smooth transitions between output voltage settings.
The ISL91128 is available in a 20 bump, 0.4mm pitch WLCSP (2.15mmx1.74mm) with a 2.5MHz switching frequency, which further reduces the size of external components.
- Accepts input voltages above or below regulated output voltage
- Automatic and seamless transitions between Buck and Boost modes
- I2C interface
- Input voltage range: 1.8V to 5.5V
- Continuous output current: up to 2.4A (PVIN = 2.5V, VOUT = 3.3V)
- High efficiency: up to 96%
- 30µA quiescent current maximizes light-load efficiency
- Selectable bypass power saving mode operation
- 2.5MHz switching frequency minimizes external component size
- Fully protected for short-circuit, over-temperature, and undervoltage
- Small 2.15mmx1.74mm WLCSP
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