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L6928D013TR Datasheet(PDF) 1 Page - STMicroelectronics |
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L6928D013TR Datasheet(HTML) 1 Page - STMicroelectronics |
1 / 9 page 1/9 L6928D February 2005 1FEATURES ■ 2V TO 5.5V 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 ■ 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 2APPLICATIONS ■ BATTERY-POWERED EQUIPMENTS ■ PORTABLE INSTRUMENTS ■ CELLULAR PHONES ■ PDAs AND HAND HELD TERMINALS ■ DSC ■ GPS 3DESCRIPTION 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. Out- put voltage can be selected by an external divider down to 0.6V. Duty Cycle can saturate to 100% al- lowing low drop-out operation. The device is based on a 1.4MHz fixed-frequency, current mode-architec- ture. Low Consumption Mode operation can be se- lected at light load conditions, allowing switching losses to be reduced. L6928D is externally synchro- nizable with a clock which makes it useful in noise- sensitive applications. Other features like Power- good, Overvoltage protection, Shortcircuit protection and Thermal Shutdown (150°C) are also present. HIGH EFFICIENCY MONOLITHIC SYNCHRONOUS STEP DOWN REGULATOR Figure 2. Application Test Circuit L 4.7 µH SYNC LX VFB C1 10 µF 6.3V C2 220pF C4 10 µF 6.3V R2 200K R3 500K R1 100K VIN=2V to 5.5V VOUT=1.8V VCC RUN COMP GND PGOOD D01IN1528 7 6 1 8 3 5 24 Figure 1. Packages Table 1. Order Codes Part Number Package L6928D MSOP8 in Tube L6928D013TR MSOP8 in Tape & Reel MSOP8 Rev. 2 |
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