ISL9123B Ultra-Low IQ Buck Regulator

Renesas Electronics ISL9123B Ultra-Low IQ Buck Regulator features an extremely low quiescent current consumption of 950nA in regulation mode. This buck regulator is capable of supplying output voltage down to 0.4V and supports a 1.8V to 5.5V input voltage range. The ISL9123B regulator delivers up to 600mA of output current (V_IN > 2.5V) and provides 86% efficiency at 10μA load (V_IN = 3.6V and V_OUT = 3.3V). This buck regulator requires a single EIA 0603 size inductor and a minimum of two external capacitors. Typical applications include smart watches and wristband devices, wireless earphones, Internet of Things (IoT) devices, water, gas, and oil meters, portable medical devices, and hearing aid devices.