Datasheet Nano EnergyTMUltra Low Iq Buck ConverterFor Low Power ApplicationsBD70522GULGeneral DescriptionKey Specifications The BD70522GUL is a Buck Converter featuring 180nA Input Voltage Range: 2.5V to 5.5V quiescent current and supports output current up to Output Voltage Range: 1.2V to 3.3V 500mA. The Constant ON-Time (COT) control with ULP Maximum Output Current: 500mA (Ultra Low Power) mode provides superior transient Operating Quiescent Current: 180nA (Typ) response and extends battery life by providing excellent Standby Current: 50nA (Typ) light load efficiency below 10µA load range. The output Operating Temperature Range: -40°C to +85°C voltage can be selected from 9 pre-set voltages by VSEL pins. When the input voltage gets close to the output PackageW(Typ) x D(Typ) x H(Max) voltage, the IC enters 100%ON mode where the VCSP50L1C 1.76mm x 1.56mm x 0.57mm switching operation stops. Features Nano EnergyTM 180nA (Typ) Quiescent Current Up to 90% Efficiency at 10µA Output Current Up to 500mA Output Current 9 Selectable Output Voltages (1.2V, 1.5V, 1.8V, 2.0V, 2.5V, 2.8V, 3.0V, 3.2V, 3.3V) Power Good Output 100%ON Mode for Low Input Voltage Discharge Function on VOUT Applications Smoke Detector Thermostat Portable Devices Wearable Devices Low-Iq Applications without Standby Switcher Energy Harvesting Typical Application Circuit VIN L1 VOUT 2.5V-5.5V 2.2μH 1.2V-3.3V VIN LX C C OUT IN EN VOUT LLUP VEN 22μF 10μF PU R VSEL1 PG VSEL1 VPG AGND VSEL2 VSEL2 PGND