L6928 - ST Microelectronics

L6928 High efficiency monolithic synchronous step down regulator

The device is a DC-DC monolithic regulator specifically designed to provide high efficiency. The L6928 supply voltage can be as low as 2 V to be used 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 100% allowing low-dropout operation. The device is based on a 1.4 MHz fi.

Features

 2 V to 5.5 V battery input range
 High efficiency: up to 95%
 Internal synchronous switch
 No external Schottky diode 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 synchronized from 1 MHz to 2 MHz
 OVP
 Short-circuit protection
 Battery-powered equipment
 Portable in.