DATA SHORT
To request the full datasheet, please visit www.intersil.com/products/ISL91127 ISL91127 FN8418
Rev 3.00
January 5, 2017 High Efficiency Buck-Boost Regulator with 4.5A Switches
The ISL91127 is a high-current, buck-boost switching regulator
for systems using new battery chemistries. It uses Intersil’s
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. Features The ISL91127 is capable of delivering at least 2.1A 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 30ВµA optimize efficiency
under all load conditions. Input voltage range: 1.8V to 5.5V The ISL91127 supports stand-alone applications with a fixed
3.3V or 3.5V output voltage or adjustable output voltage with
an external resistor divider. Output voltages as low as 1V or as
high as 5.2V are supported. Fully protected for short-circuit, over-temperature, and
undervoltage The ISL91127 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. Applications Related Literature Accepts input voltages above or below regulated output …