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L6926 数据表(PDF) 1 Page - STMicroelectronics |
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L6926 数据表(HTML) 1 Page - STMicroelectronics |
1 / 11 page 1/11 L6926 November 2004 1 FEATURES ■ 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 ■ 600kHz SWITCHING FREQUENCY ■ EXTERNALLY SYNCHRONIZABLE FROM 500kHz TO 1.4MHz ■ OVP ■ SHORT CIRCUIT PROTECTION 2 APPLICATIONS ■ BATTERY-POWERED EQUIPMENTS ■ PORTABLE INSTRUMENTS ■ CELLULAR PHONES ■ PDAs AND HAND HELD TERMINALS ■ DSC ■ GPS 3 DESCRIPTION The device is dc-dc monolithic regulator specifically designed to provide extremely high efficiency. L6926 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 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. L6926 is externally synchroni- zable with a clock which makes it useful in noise-sen- sitive applications. Other features like Powergood, 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 6.8 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 D01IN1305 7 6 1 8 3 5 24 Figure 1. Packages Table 1. Order Codes Part Number Package L6926 MSOP8 in Tube L6926013TR MSOP8 in Tape & Reel L6926D1 VFSON-8 in Tube L6926D1013TR VFSON8 in Tape & Reel VFSON8 (3x4.9x1mm) MSOP8 Rev. 4 |
类似零件编号 - L6926 |
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类似说明 - L6926 |
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