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L6925D Arkusz danych(PDF) 1 Page - STMicroelectronics |
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L6925D Arkusz danych(HTML) 1 Page - STMicroelectronics |
1 / 5 page 1/5 L6925D September 2003 s 2.7V TO 5.5V BATTERY INPUT RANGE s HIGH EFFICIENCY: UP TO 95% s INTERNAL SYNCHRONOUS SWITCH s NO EXTERNAL SCHOTTKY REQUIRED s EXTREMELY LOW QUIESCENT CURRENT s 800mA MAX OUTPUT CURRENT s ADJUSTABLE OUTPUT VOLTAGE FROM 0.6V s LOW DROP-OUT OPERATION: UP TO100% DUTY CYCLE s SELECTABLE LOW NOISE/LOW CONSUMPTION MODE AT LIGHT LOAD s LOW BATTERY INPUT s LOW BATTERY OUTPUT s ±1% OUTPUT VOLTAGE ACCURACY s CURRENT-MODE CONTROL s 600kHz SWITCHING FREQUENCY s EXTERNALLY SYNCHRONIZABLE FROM 500kHz TO 1.4MHz s OVP s SHORT CIRCUIT PROTECTION APPLICATIONS s BATTERY-POWERED EQUIPMENTS s PORTABLE INSTRUMENTS s CELLULAR PHONES s PDAs AND HAND HELD TERMINALS s DSC s GPS DESCRIPTION The device is dc-dc monolithic regulator specifically designed to provide extremely high efficiency. The device has on UVLO set at 2.7V cause it is part- icurarly thought for single Li-ion cell applications. Output 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 600kHz fixed-frequency, current mode-architec- ture. Low Consumption Mode operation can be se- lected at light load conditions, allowing switching losses to be reduced. L6925D is externally synchro- nizable with a clock which makes it useful in noise- sensitive applications. LBI pin can be used to have a LBO signal when the Battery voltage is lower than a preset value. Other features like, Overvoltage protec- tion, Shortcircuit protection and Thermal Shutdown (150°C) are also present. MSOP8 ORDERING NUMBERS: L6925D (Tube) L6925013TR (Tape & Reel) HIGH EFFICIENCY MONOLITHIC SYNCHRONOUS STEP DOWN REGULATOR APPLICATION TEST CIRCUIT L 6.8 µH SYNC LX VFB C1 10 µF 6.3V C2 220pF C4 10 µF 6.3V R4 200K R2 600K R1 100K R3 100K VIN=2.7V to 5.5V VOUT=1.8V VCC LBI COMP GND LBO D01IN1238B 7 6 1 8 3 5 24 |
Podobny numer części - L6925D |
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Podobny opis - L6925D |
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