LT8610AB Datasheet

• LT8610 Feature Set, Plus:
  • 3.5A Maximum Output Current Fast
  • 30ns Minimum Switch-On Time
  • Improved Burst Mode Efficiency
  • Improved EMI
• Wide Input Voltage Range: 3.4V to 42V
• Ultralow Quiescent Current Burst Mode^® Operation:
  • 2.5μA I_Q Regulating 12V_IN to 3.3V_OUT
• Fixed Output Voltages: 3.3V, 5V
• High Efficiency Synchronous Operation:
  • 95% Efficiency at 1A, 5V_OUT from 12V_IN
  • 93% Efficiency at 1A, 3.3V_OUT from 12V_IN
• Low Dropout Under All Conditions: 200mV at 1A
• Safely Tolerates Inductor Saturation in Overload
• Adjustable and Synchronizable Frequency:
  • 200kHz to 2.2MHz
• Accurate 1V Enable Pin Threshold
• Output Soft-Start and Tracking
• Small Thermally Enhanced 16-Lead MSOP Package
• AEC-Q100 Qualified for Automotive Applications

• Automotive and Industrial Supplies
• GSM Power Supplies

The LT8610AB series are compact, high efficiency, high speed synchronous monolithic step-down switching regulators that consume only 2.5μA of quiescent current. Compared to the LT8610, they have higher maximum output currents of 3.5A and a faster minimum switch-on time of 30ns. The LT8610AB has even higher light load efficiency.

The other features of the LT8610 remain unchanged in the LT8610AB series. A SYNC pin allows synchronization to an external clock. The EN/UV pin has an accurate 1V threshold for V_IN undervoltage lockout or shut down. A capacitor on the TR/SS pin programs the output voltage ramp rate during startup. The PG flag signals when V_OUT is within ±9% of the programmed output voltage as well as fault conditions.