LTM4609 Datasheet | Linear Technology

36VIN, 34VOUT High Efficiency Buck-Boost DC/DC µModule Regulator Features DESCRIPTION n Single Inductor Architecture Allows VIN Above, Below or Equal to VOUT n Wide VIN Range: 4.5V to 36V n Wide VOUT Range: 0.8V to 34V n IOUT: 4A DC (10A DC in Buck Mode) n Up to 98% Efficiency n Current Mode Control n Power Good Output Signal n Phase-Lockable Fixed Frequency: 200k Hz to 400k Hz n Ultrafast Transient Response n Current Foldback Protection n Output Overvoltage Protection n Small Surface Mount Footprint, Low Profile (15mm × 15mm × 2.82mm) LGA and (15mm × 15mm × 3.42mm) BGA Packages n Sn Pb (BGA) or Ro HS pliant (LGA and BGA) Finish The LTM®4609 is a high efficiency switching mode buckboost power supply. Included in the package are the switching controller, power FETs and support ponents. Operating over an input voltage range of 4.5V to 36V, the LTM4609 supports an output voltage range of 0.8V to 34V, set by a resistor. This high efficiency design delivers up to 4A continuous current in boost mode (10A in buck mode). Only the inductor, sense resistor, bulk input and output capacitors are needed to finish the design. The low profile package enables utilization of unused space on the bottom of PC boards for high density point of load regulation. The high switching frequency and current mode architecture enable a very fast transient response to line and load changes without sacrificing stability. The LTM4609 can be frequency synchronized with an external clock to reduce undesirable frequency harmonics. APPLICATIONS n Tele, Servers and Networking Equipment n Industrial and Automotive Equipment n High Power Battery-Operated Devices Fault protection Features include overvoltage and foldback current protection. The DC/DC µModule® regulator is offered in small 15mm × 15mm × 2.82mm LGA and 15mm × 15mm × 3.42mm BGA packages. The LTM4609 is available with Sn Pb (BGA) or Ro HS pliant terminal finish. All registered trademarks and trademarks are the property...