LT3791-1 Datasheet | Linear Technology

LT3791-1 60V 4-Switch Synchronous Buck-Boost Controller Features 4-Switch Single Inductor Architecture Allows VIN Above, Below or Equal to VOUT n Synchronous Switching: Up to 98.5% Efficiency n Wide V Range: 4.7V to 60V IN n2% Output Voltage Accuracy: 1.2V ≤ V OUT < 60V n6% Output Current Accuracy: 0V ≤ V OUT < 60V n Input and Output Current Regulation with Current Monitor Outputs n No Top FET Refresh in Buck or Boost n V OUT Disconnected from VIN During Shutdown n C/10 Charge Termination and Output Shorted Flags n Capable of 100W or greater per IC n38-Lead TSSOP with Exposed Pad n Description The LT®3791-1 is a synchronous 4-switch buck-boost voltage/current regulator controller. The controller can regulate 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 200k Hz to 700k Hz. 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, battery/super-capacitor charger applications in automotive, industrial, tele, 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. Applications Automotive, Tele, Industrial Systems n High Power Battery-Powered System n Typical Application 120W (24V 5A) Buck-Boost Voltage Regulator VIN 12V TO 58V 0.003Ω VIN IVINN IVINP TEST1 EN/UVLO OVLO 56.2k 27.4k 100k INTVCC 200k SHORT C/10 CCM IVINMON ISMON CLKOUT PWMOUT VREF PWM 100k CTRL SS SYNC V C 33n F 10n F 5.1k RT SGND 147k 200k Hz LT3791-1 INTVCC...