The L6920DB is a high efficiency monolithic step-up switching converter IC especially designed for battery powered applications, thanks to its minimum start-up of 0.8 V, and a minimum operating voltage of 0.6 V. It requires only three external components to realize the conversion from battery voltage to the selected output voltage. It has a minimum output voltage of 1.8 V, which is enough to supply even the most advanced ASICs and microprocessors. The high switching frequency allows users to choose small inductors and output capacitors for their designs. Supervisory functions include Reference Voltage, Low Battery Detection, and Shutdown, which are provided with overcurrent protection.
This document is an application note (AN2206) published by STMicroelectronics in March 2007. It focuses on the L6920DB, a monolithic step-up switching converter IC designed for battery-powered applications. The IC features a minimum start-up voltage of 0.8 V and a minimum operating voltage of 0.6 V, requiring only three external components to convert battery voltage to a selected output voltage. Key supervisory functions include reference voltage, low battery detection, shutdown, and overcurrent protection.
| Minimum start-up voltage | 0.8 V |
|---|---|
| Minimum operating voltage | 0.6 V |
| Minimum output voltage | 1.8 V |
| Maximum switching frequency | approximately 1MHz |
| Peak current limit | 800 mA typ. |
| Low battery detection threshold | 1.23 V |
The minimum operating voltage is 0.6 V.
It requires only three external components.
The maximum reachable switching frequency is approximately 1MHz.