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LT3756 Datasheet(PDF) 1 Page - Linear Technology |
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LT3756 Datasheet(HTML) 1 Page - Linear Technology |
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1 / 26 page  LT3791-1 1 37911fa For more information www.linear.com/LT3791-1 Typical applicaTion FeaTures DescripTion 60V 4-Switch Synchronous Buck-Boost Controller TheLT®3791-1isasynchronous4-switchbuck-boostvolt- age/currentregulatorcontroller.Thecontrollercanregulate output voltage, output current, or input current with input voltages above, below, or equal to the output voltage. The constant-frequency, current mode architecture allows its frequency to be adjusted or synchronized from 200kHz to 700kHz. No top FET refresh switching cycle is needed in buck or boost operation. With 60V input, 60V output capability and seamless transitions between operating regions, the LT3791-1 is ideal for voltage regulator, bat- tery/super-capacitor charger applications in automotive, industrial, telecom, and even battery-powered systems. The LT3791-1 provides input current monitor, output current monitor, and various status flags, such as C/10 charge termination and shorted output flag. L , LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks of Linear Technology Corporation. All other trademarks are the property of their respective owners. 120W (24V 5A) Buck-Boost Voltage Regulator applicaTions n 4-Switch Single Inductor Architecture Allows VIN Above, Below or Equal to VOUT n Synchronous Switching: Up to 98.5% Efficiency n Wide VIN Range: 4.7V to 60V n 2% Output Voltage Accuracy: 1.2V ≤ VOUT < 60V n 6% Output Current Accuracy: 0V ≤ VOUT < 60V n Input and Output Current Regulation with Current Monitor Outputs n No Top FET Refresh in Buck or Boost n VOUT Disconnected from VIN During Shutdown n C/10 Charge Termination and Output Shorted Flags n Capable of 100W or greater per IC n 38-Lead TSSOP with Exposed Pad Efficiency vs Load Current n Automotive, Telecom, Industrial Systems n High Power Battery-Powered System LOAD CURRENT (A) 0 1 90 95 100 37911 TA01b 80 70 60 85 75 65 2 3 4 5 VIN = 12V VIN = 24V VIN = 54V VIN 12V TO 58V INTVCC TG1 BG1 SNSP SNSN BST1 BST2 BG2 PGND SW2 TG2 RT LT3791-1 SWI SHORT C/10 CCM 470nF IVINN VIN IVINP IVINMON ISMON CLKOUT PWMOUT TEST1 EN/UVLO OVLO VREF PWM CTRL 147k 200kHz VC SYNC SS SGND 1µF 499k 56.2k 100k 499k 27.4k INTVCC 0.1µF 33nF 10nF 37911 TA01a 0.004 ISP ISN FB 0.1µF 10µH 0.1µF 4.7µF 4.7µF 50V ×2 4.7µF 100V 47µF 80V 0.015 VOUT 24V 5A 73.2k 3.83k 5.1k + 220µF 35V + 100k 200k 0.003 50 |
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