LT8610AC-1 Datasheet

• LT8610 Feature Set, Plus:
  • 3V Minimum Input Voltage
  • 800mV Feedback Voltage
  • 3.5A Maximum Output Current
  • Fast 30ns Minimum Switch-On Time
  • Improved Burst Mode Efficiency
  • Improved EMI
• Wide Input Voltage Range: 3V to 42V
• Ultralow Quiescent Current Burst Mode^® Operation:
  • 2.5μA I_Q Regulating 12V_IN to 3.3V_OUT
• Low Dropout Under All Conditions: 200mV at 1A
• High Efficiency Synchronous Operation:
  • 95% Efficiency at 1A, 5V_OUT from 12V_IN
  • 93% Efficiency at 1A, 3.3V_OUT from 12V_IN
• Safely Tolerates Inductor Saturation in Overload
• Adjustable and Synchronizable Frequency:
  • LT8610AC-1: 1.5MHz to 2.2MHz
• Accurate 1.015V 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 LT8610AC-1 is a compact, high efficiency, high speed synchronous monolithic step-down switching regulator that consumes only 2.5μA of quiescent current. Compared to the LT8610AB, the LT8610AC-1 has a lower feedback voltage of 800mV and a lower minimum V_IN of 3V. The LT8610AC-1 has the same additional features of the LT8610AB as compared to the LT8610: higher maximum output current of 3.5A, faster minimum on time of 30ns, and higher light load efficiency.

The LT8610AC-1 has a SYNC pin for synchronization to an external clock. A capacitor on the TR/SS pin programs the output voltage ramp rate during startup. The PG flag signals when V_OUT is within ±8% of the programmed output voltage as well as fault conditions. The LT8610AC-1 has internal compensation optimized for high switching frequencies resulting in improved transient response compared to the LT8610AC. The LT8610AC-1 also has a feature which will soft-start the part when exiting dropout or brownout conditions reducing output voltage overshoot.