L6928(2011) Datasheet PDF - STMicroelectronics

Description
The device is DC-DC monolithic regulator specifically designed to provide extremely high efficiency. L6928 supply voltage can be as low as 2 V allowing its use in single Li-Ion cell supplied applications. Output voltage can be selected by an external divider down to 0.6 V. Duty cycle can saturate to 100% allowing low dropout operation. The device is based on a 1.4 MHz fixed frequency, current mode architecture.

FEATUREs
■ 2 V to 5.5 V battery input range
■ High efficiency: up to 95%
■ Internal synchronous switch
■ No external Schottky required
■ Extremely low quiescent current
■ 1 µA max shutdown supply current
■ 800 mA max output current
■ Adjustable output voltage from 0.6 V
■ Low dropout operation: up to 100% duty cycle
■ Selectable low noise/low consumption mode at light load
■ Power Good signal
■ ± 1% output voltage accuracy
■ Current-mode control
■ 1.4 MHz switching frequency
■ Externally synchronizable from 1 MHz to 2 MHz
■ OVP
■ Short-circuit protection

APPLICATIONs
■ Battery-powered equipment
■ Portable instruments
■ Cellular phones
■ PDAs and hand held terminals
■ DSC
■ GPS