DescripTion
The LT®8611 is a compact, high efficiency, high speed synchronous monolithic step-down switching regulator that consumes only 2.5µA of quiescent current. Top and bottom power switches are included with all necessary circuitry to minimize the need for external components. The built-in current sense amplifier with monitor and control pins allows accurate input or output current regulation and limiting. Low ripple Burst Mode operation enables high efficiency down to very low output currents while keeping the output ripple below 10mVP-P.

FEATUREs
Rail-to-Rail Current Sense Amplifier with Monitor
Wide Input Voltage Range: 3.4V to 42V
Ultralow Quiescent Current Burst Mode® Operation:
  2.5μA IQ Regulating 12VIN to 3.3VOUT
  Output Ripple < 10mVP-P
High Efficiency Synchronous Operation:
  96% Efficiency at 1A, 5VOUT from 12VIN
  94% Efficiency at 1A, 3.3VOUT from 12VIN
Fast Minimum Switch-On Time: 50ns
Low Dropout Under All Conditions: 200mV at 1A
Allows Use Of Small Inductors
Low EMI
Adjustable and Synchronizable: 200kHz to 2.2MHz
Current Mode Operation
Accurate 1V Enable Pin Threshold
Internal Compensation
Output Soft-Start and Tracking
Small Thermally Enhanced 3mm × 5mm 24-Lead QFN Package

APPLICATIONs
Automotive and Industrial Supplies
General Purpose Step-Down
CCCV Power Supplies