DATASHEET
ISL9120IR FN8743
Rev 1.00
February 2, 2016 Compact High Efficiency Low Power Buck-Boost Regulator
The ISL9120IR is a highly integrated buck-boost switching
regulator that accepts input voltages either above or below the
regulated output voltage. This regulator automatically
transitions between buck and boost modes without significant
output disturbance. The ISL9120IR also has automatic bypass
functionality for when the input voltage is generally within 1%
to 2% of the output voltage, there will be a direct bypass
connection between the VIN and VOUT pins. In addition to the
automatic bypass functionality, the ISL9120IR also has a
forced bypass functionality with the use of the BYPS pin. Features This device is capable of delivering up to 800mA of output
current (VIN = 2.5V, VOUT = 3.3V) and provides excellent
efficiency due to its adaptive current limit pulse frequency
modulation (PFM) control architecture. Adaptive multilevel current limit scheme to optimize
efficiency at low and high currents The ISL9120IR is designed for stand-alone applications and
supports a 3.3V fixed output voltage or variable output
voltages with an external resistor divider. The forced bypass
power saving mode can be chosen if voltage regulation is not
required. The device consumes less than 3.5ВµA of current over
the operating temperature range in the forced bypass mode. …
