DESCRIPTION

The device is dc-dc monolithic regulator specifically designed to provide extremely high efficiency.

L6926D 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 600kHz fixed-frequency, current mode-architecture. Low Consumption Mode operation can be selected at light load conditions, allowing switching losses to be reduced. L6926D is externally synchronizable with a clock which makes it useful in noisesensitive applications. Other features like Powergood, Overvoltage protection, Shortcircuit protection and Thermal Shutdown (150°C) are also present.

■ 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

■ 600kHz SWITCHING FREQUENCY

■ EXTERNALLY SYNCHRONIZABLE FROM 500kHz TO 1.4MHz

■ OVP

■ SHORT CIRCUIT PROTECTION

APPLICATIONS

■ BATTERY-POWERED EQUIPMENTS

■ PORTABLE INSTRUMENTS

■ CELLULAR PHONES

■ PDAs AND HAND HELD TERMINALS

■ DSC