DESCRIPTION
The LTM®4609 is a high efficiency switching mode buckboost power supply. Included in the package are the switching controller, power FETs and support components. 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 fi nish the design.

FEATURES
■ Single Inductor Architecture Allows VIN Above, Below or Equal to VOUT
■ Wide VIN Range: 4.5V to 36V
■ Wide VOUT Range: 0.8V to 34V
■ IOUT: 4A DC (10A DC in Buck Mode)
■ Up to 98% Effi ciency
■ Current Mode Control
■ Power Good Output Signal
■ Phase-Lockable Fixed Frequency: 200kHz to 400kHz
■ Ultrafast Transient Response
■ Current Foldback Protection
■ Output Overvoltage Protection
■ Small, Low Profi le Surface Mount LGA Package (15mm × 15mm × 2.8mm)

APPLICATIONS
■ Telecom, Servers and Networking Equipment
■ Industrial and Automotive Equipment
■ High Power Battery-Operated Devices