LTC3872-1

LTC3872-1 No RSENSE Current Mode Boost DC/DC Controller Features n No Current Sense Resistor Required n VOUT up to 60V n Constant Frequency 550kHz Operation n Internal Soft-Start and Optional External Soft-Start n Adjustable Current Limit n Pulse Skipping at Light Load n VIN Range: 2.75V to 9.8V n ±1.5% Voltage Reference Accuracy n Current Mode Operation for Excellent Line and Load Transient Response n Low Profile (1mm) SOT-23 and 2mm × 3mm DFN Packages Applications n Telecom Power Supplies n 42V Automotive Systems n 24V Industrial Controls n IP Phone Power Supplies Description The LTC®3872-1 is a constant frequency current mode boost DC/DC controller that drives an N-channel power MOSFET and requires very few external components. The No RSENSETM architecture eliminates the need for a sense resistor, improves efficiency and saves board space. The LTC3872-1 provides excellent AC and DC load and line regulation with ±1.5% output voltage accuracy. It incorporates an und...