ET82099 | ETEK Microelectronics

Synchronous Boost Converter, ET82099, ETEK Microelectronics

The ET82099 device is a synchronous boost converter with less than 1 µA ultra-low quiescent current. The device is designed for products powered by an alkaline battery, lithium battery, or rechargeable Li-Ion battery, for which high efficiency under light-load conditions is critical to achieve long battery life operation. The ET82099 offers adjustable output voltage. Hysteretic control topology has been employed to obtain maximal efficiency at minimal quiescent current. ET82099 consumes only 1 µA quiescent current in sleep mode and can achieve up to 80% efficiency at 100 µA load. It can also support up to 300 mA output current from 3.3 V to 5 V conversion, and achieve up to 93% at 200 mA load.

The ET82099 supplies both Down Mode and Pass-Through operations for different applications. In Down Mode, the output voltage can still be regulated at the target value even when the input voltage is higher than the output voltage. In Pass-Through Mode, the output voltage follows the input voltage. The ET82099 exits Down Mode and enters Pass-Through Mode when VIN > VOUT + 0.35 V. The ET82099 supports a true shutdown function when it is disabled, which disconnects the load from the input supply to reduce the current consumption.

Features

• Regulated Output Voltage in Down Mode
• True Disconnection During Shutdown

Applications

• Temperature sensors
• Pressure sensors
• Precision current sensing
• Strain gauge amplifiers
• Medical instrumentation
• Thermocouple amplifiers