Datasheet

Data brief
For further information contact your local STMicroelectronics sales office.
November 2010 Doc ID 18237 Rev 1 1/4
4
STEVAL-ISA077V1
High efficiency synchronous rectifier step-up converter
demonstration board based on the L6920DB
Features
■ Up to 5.5 V operating input voltage
■ Internal synchronous rectifier
■ Adjustable output voltage from 1.8 V
■ 3.3 V and 5 V fixed output voltages
■ Low battery voltage detection
■ Reverse battery protection
■ 750 mA input current limit
■ Switching frequency up to 1 MHz
■ RoHS compliant
Description
The STEVAL-ISA077V1 demonstration board is
based on the L6920DB which is a high efficiency
monolithic step-up switching converter IC
especially designed for battery powered
applications, thanks to its minimum startup 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 the user 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.
STEVAL-ISA077V1
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