L6928D(2005) Datasheet PDF - STMicroelectronics

DESCRIPTION
The device is dc-dc monolithic regulator specifically designed to provide extremely high efficiency.
L6928D supply voltage can be as low as 2V allowing its use in single Li-ion cell supplied applications. Output voltage can be selected by an external divider down to 0.6V. Duty Cycle can saturate to 100% allowing low drop-out operation. The device is based on a 1.4MHz fixed-frequency, current mode-architecture.

FEATURES
■ 2V TO 5.5V BATTERY INPUT RANGE
■ HIGH EFFICIENCY: UP TO 95%
■ INTERNAL SYNCHRONOUS SWITCH
■ NO EXTERNAL SCHOTTKY REQUIRED
■ EXTREMELY LOW QUIESCENT CURRENT
■ 1µA MAX SHUTDOWN SUPPLY CURRENT
■ 800mA MAX OUTPUT CURRENT
■ ADJUSTABLE OUTPUT VOLTAGE FROM 0.6V
■ LOW DROP-OUT OPERATION: UP TO100% DUTY CYCLE
■ SELECTABLE LOW NOISE/LOW CONSUMPTION MODE AT LIGHT LOAD
■ POWER GOOD SIGNAL
■ ±1% OUTPUT VOLTAGE ACCURACY
■ CURRENT-MODE CONTROL
■ 1.4MHz SWITCHING FREQUENCY
■ EXTERNALLY SYNCHRONIZABLE FROM 1MHz TO 2MHz
■ OVP
■ SHORT CIRCUIT PROTECTION

APPLICATIONS
■ BATTERY-POWERED EQUIPMENTS
■ PORTABLE INSTRUMENTS
■ CELLULAR PHONES
■ PDAs AND HAND HELD TERMINALS
■ DSC
■ GPS