FTM Board Club
Ultra-Low Iq Buck-Boost Regulator with Bypass Evaluation Board for ISL9122AIINZ

The ISL9122A is a highly integrated non-inverting buck-boost switching regulator that accepts input voltages both above or below the regulated output voltage. 

It features an extremely low quiescent current consumption of 1300nA in Regulation mode, 120nA in Forced Bypass mode, and 8nA in Shutdown mode. It provides 80% efficiency at 10μA load and has a peak efficiency more than 97%. It supports input voltages from 1.8V to 5.5V.


• 1300nA quiescent current

• 84% efficiency at 10μA load

• 97% peak efficiency

• Input voltage range: 1.8V to 5.5V

• Output voltage range: 1.8V to 5.375V

• Output current: up to 500mA (VIN = 3.6V, VOUT = 3.3V)

• Selectable Forced and Auto Bypass power saving modes

• Seamless PWM/PFM and buck/boost transition

• Ultrasonic mode for acoustic noise suppression

• I2C Control and voltage adjustability

• Hysteretic controller

• Small 1.8mmx1.0mm WLCSP and 8 Ld DFN packages