Features

• Wide Input Voltage Range: 3.0V to 42V
• Ultralow Quiescent Current Burst Mode® Operation:
  <2.5μA I_Q Regulating 12V_IN to 3.3V_OUT
  Output Ripple <10mV_P-P
• High Efficiency 2MHz Synchronous Operation:
• >92% Efficiency at 0.5A, 5V_OUT from 12V_IN
• 350mA Maximum Continuous Output
• Fast Minimum Switch-On Time: 45ns
• Adjustable and Synchronizable: 200kHz to 2.2MHz
• Spread Spectrum Frequency Modulation for Low EMI
• Allows Use of Small Inductors
• Low Dropout
• Peak Current Mode Operation
• Accurate 1V Enable Pin Threshold
• Internal Compensation
• Output Soft-Start and Tracking
• Small 10-Lead MSOP Package or 8-Lead 2mm × 2mm DFN Package

Typical Application

Description

The LT®8606 is a compact, high efficiency, high speed synchronous monolithic step-down switching regulator that consumes only 1.7μA of non-switching quiescent current. The LT8606 can deliver 350mA of continuous current. Top and bottom power switches are included with all necessary circuitry to minimize the need for external components. Low ripple Burst Mode operation enables high efficiency down to very low output currents while keeping the output ripple below 10mV_P-P. Internal compensation with peak current mode topology allows the use of small inductors and results in fast transient response and good loop stability. The EN/UV pin has an accurate 1V threshold and can be used to program V_IN undervoltage lockout or to shut down the LT8606 reducing the input supply current to 1μA. The PG pin signals when V_OUT is within ±8.5% of the programmed output voltage as well as fault conditions.

The LT8606 in the 10-lead MSOP allows selection of low I_Q Burst Mode operation, pulse skip or spread spectrum operation for low EMI, and can be synchronized to an external clock. The 8-lead 2mm × 2mm DFN package operates in Burst Mode operation. The MSOP has programmable soft-start and tracking.