DESCRIPTION
The LTC®3772 is a constant frequency current mode step-down DC/DC controller in a low profile 8-lead SOT-23 (ThinSOTTM) and a 3mm × 2mm DFN package. The No RSENSETM architecture eliminates the need for a current sense resistor, improving efficiency and saving board space.

FEATURES
■ No Current Sense Resistor Required
■ 40µA No-Load Quiescent Current
■ High Output Currents Easily Achieved
■ Internal Soft-Start Ramps VOUT
■ Wide VIN Range: 2.75V to 9.8V
■ Low Dropout: 100% Duty Cycle
■ Constant Frequency 550kHz Operation
■ Low Ripple Burst Mode® Operation at Light Load
■ Output Voltage as Low as 0.8V
■ ±1.5% Voltage Reference Accuracy
■ Current Mode Operation for Excellent Line and Load
   Transient Response
■ Only 8µA Supply Current in Shutdown
■ Low Profile 8-Lead SOT-23 (1mm) and
   (3mm × 2mm) DFN (0.75mm) Packages

APPLICATIONS
■ 1- or 2-Cell Li-Ion Battery-Powered Applications
■ Wireless Devices
■ Portable Computers
■ Distributed Power Systems