80V Sync Buck-Boost Variable Input 2.8V to 80V Up to 250W IIN SET Input Current: Regulate or Monitor CSN CSP BG2 TG1 CSPIN VIN SET Fixed Output 1.3V to 80V Output Current: Regulate or Monitor BG1 CSNIN IOUT SET TG2 LT8705 CSPOUT CSNOUT FBIN VOUT SET FBOUT GND Four Regulation Loops (VOUT, I OUT, VIN and IIN) ® The LT 8705 is the latest in our growing family of single inductor buck-boost controllers. This wide input voltage range, high power controller is capable of delivering efficiencies up to 98.5% for a 48V, 5A output from an input voltage range of 2.8V to 80V. Using a single inductor and 4 external MOSFETs, the LT8705 can deliver output power up to 250W. Input or output voltage or current, any of these can be regulated with the devices’ 4 control loops. Its input regulation loop is ideal for high impedance sources such as solar panels. Features 36V to 80V Input; 48V, 5A Output 100 •Single Inductor •VOUT Range: 1.3V to 80V •VOUT, IOUT, VIN, IIN Feedback Loops •Current Monitors •Synchronous Rectification •Quad N-Channel MOSFET Gate Drivers •Solar-Powered Battery Charger Capable 1-800-4-LINEAR 98.0 97.0 Efficiency (%) •VIN Range: 2.8V to 80V Info & Free Samples www.linear.com/product/LT8705 99.0 •Very High Efficiency 96.0 95.0 94.0 93.0 VIN = 36V 92.0 VIN = 48V 91.0 VIN = 80V 90.0 0.5 1.00 2.00 3.00 4.00 Load Current (A) video.linear.com/138 5.00 , 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.