DATASHEET
ISL91108 FN8448
Rev 1.00
November 12, 2014 High Efficiency Buck-Boost Regulator with 4.2A Switches
The ISL91108 is a highly-integrated buck-boost switching
regulator that accepts input voltages either above or below the
regulated output voltage. Unlike other buck-boost regulators,
this regulator automatically transitions between operating
modes without significant output disturbance.
This device is capable of delivering up to 2.7A of burst current
(PVIN = 3V, VOUT = 3.3V), and provides excellent efficiency due
to its fully synchronous 4-switch architecture. No load
quiescent current of only 27.5ВµA also optimizes efficiency
under light-load conditions. Forced PWM and/or
synchronization to an external clock may also be selected for
noise sensitive applications.
The ISL91108 is designed for standalone applications and
supports a 3.3V fixed output voltage or variable output
voltages with an external resistor divider. Output voltages as
low as 1V or as high as 5.2V are supported using an external
resistor divider.
The ISL91108 requires only a single inductor and very few
external components. Power supply solution size is minimized …
