描述 Description

The ET82099 device is a synchronous boost converter with less than 1μA 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 condition is critical to achieve long battery life operation. The ET82099 offers adjustable output voltage.Hysteric control topology has been employed to obtain maximal efficiency at minimal quiescent current. ET82099 consumes only 1μA quiescent current in sleep mode and can achieve up to 80% efficiency at 100μA load. It can also support up to 300mA output current from 3.3V to 5V conversion, and achieve up to 93% at 200mA 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 target value even when input voltage is higher than output voltage. In Pass-Through Mode, the output voltage follows input voltage. The ET82099 exits Down Mode and enters into Pass-Through Mode when VIN>VOUT+0.35V. The ET82099 supports true shutdown function when it is disabled, which disconnects the load from the input supply to reduce the current consumption. They are available in WCSP6 ,DFN6 and SOT23-6 Package.

特性 Features

? 250nA Ultra-Low IQ into VIN Pin

? 500nA Ultra-Low IQ into VOUT Pin

? Operating Input Voltage from 0.7V to 5.5V

? Adjustable Output Voltage from 1.8V to 5.5V

? Minimum 0.8A Switch Peak Current Limit

? Regulated Output Voltage in Down Mode

? True Disconnection During Shutdown

? Up to 80% Efficiency at 100μA Load with 3.8V VIN and 5V Output

? Up to 93% Efficiency

應(yīng)用 Application

? LCD Bias
? Optical Heart Rate Monitor LED Bias
? Portable and Wearable Applications
? Low Power Wireless Applications
? Battery Powered Systems