LT8604 Datasheet

• High Efficiency 2MHz Synchronous Operation
  • > 90% Efficiency at 50mA, 12V_IN to 5V_OUT
• Ultralow Quiescent Current Burst Mode Operation
  • < 2.5μA I_Q Regulating 24V_IN to 3.3V_OUT
  • Output Ripple < 10mV_P-P
• Wide Input Voltage Range: 3.2V to 42V
• Fast Minimum Switch-On Time: 35ns
• Adjustable (All) Switching Frequency: 200kHz to 2.2MHz
• Internal Compensation
• Output Soft-Start and Tracking
• Small 10-Lead 3mm × 2mm Side-Wettable DFN Package
• AEC-Q100 Qualified for Automotive Applications (LT8604)

• Industrial Sensors
• Industrial Internet of Things
• 4mA to 20mA Current Loops
• Flow Meters
• Automotive Housekeeping Supplies

The LT8604 is a compact, high speed synchronous monolithic step-down switching regulator that delivers up to 120mA to the output with high efficiency at a constant frequency, even up to 2.2MHz. It accepts a wide input voltage range up to 42V and consumes only 2.5μA of quiescent current when operating in Burst Mode. Top and bottom power switches are included with all necessary circuitry to minimize the need for external components.

The SYNC/MODE pin selects the regulator’s operation between forced continuous mode, for predictive interference in sampling systems, Burst Mode, for increased efficiency at light loads or spread spectrum for Low EMI. It also allows synchronization to an external clock to further increase signal to noise ratio in high-resolution acquisition systems.

A PG flag signals when V_OUT is within ±7.5% of the programmed output voltage and when in fault conditions. Thermal shutdown provides additional protection.