DATASHEET
ISL9110A FN8299
Rev 1.00
June 8, 2012 1.2A High Efficiency Buck-Boost Regulator Features The ISL9110A 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. Accepts Input Voltages Above or Below Regulated Output
Voltage Automatic and Seamless Transitions Between Buck and
Boost Modes This part is capable of delivering up to 1.2A output current,
and provides excellent efficiency due to its fully synchronous
4-switch architecture. No-load quiescent current of only 35ВµA
also optimizes efficiency under light-load conditions. Forced
PWM and/or synchronization to an external clock may also be
selected for noise sensitive applications. Input Voltage Range: 1.8V to 5.5V Output Current: Up to 1.2A High Efficiency: Up to 95% 35ВµA Quiescent Current Maximizes Light-load Efficiency The ISL9110A is designed for standalone applications and
supports 3.3V and 5V fixed output voltages 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. 2.5MHz Switching Frequency Minimizes External
Component Size The ISL9110A requires only a single inductor and very few
external components. Power supply solution size is minimized
by a 2.4mm x 1.6mm WLCSP package and a 2.5MHz
switching frequency, which further reduces the size of external …