LT3504 block DiagraM OUT1 PGOOD 3504 BD SW5 SW1 DA1 PG SKY V IN D5 Q5 Q1 SWITCH AND DRIVE POWER GOOD LOGIC BOOST SWITCH AND DRIVE FB1 0.72V NQ NQ S R S R TORS FROM OTHER CHANNELS 1SHOT SKYBAD ARA TOR TORS SHOWN 0.7V COMP Σ 0.7V Σ BOOST REGULA SLOPE GND CURRENT LIMIT FOLDBACK 0.8V ONE OF THE FOUR BUCK REGULA FB1 4.85V SLOPE SKY BOOST ERROR AMP V IN 0.8V 1SHOT RAMP SKYBAD LOCK TO CH3 0.1V A +– TO CH2, CH4 1µ 4.5V REF 2.2V SKY TUP/SHUTDOWN FREQUENCY TO CURRENT AR V IN ST ON 1 RUN/SS1 SKYBAD CLK1 CLK2 OSC 0 1.3µA 0.4V THERMAL SHUTDOWN PRECISION UVLO 1.44V RT/SYNC SYNC DETECT EN/UVLO V IN 3504fa 8 For more information www.linear.com/LT3504 Document Outline Features Description Applications Typical Application Absolute Maximum Ratings Pin Configuration Order Information Electrical Characteristics Typical Performance Characteristics Pin Functions Block Diagram Operation Applications Information Package Description Revision History Typical Application Related Parts
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