LT8619-5 Datasheet

Part No.

In Stock

Price

Packaging

SPQ

Marking

MSL

Pins

Temp Range

Package Description

• Wide Input Voltage Range: 3V to 60V
• Fast Minimum Switch-On Time: 30ns
• Ultralow Quiescent Current Burst Mode Operation:
  • 6μA I_Q Regulating 12V_IN to 3.3V_OUT
  • 10mV_P-P Output Ripple at No Load
• Synchronizable/Programmable Fixed Frequency Forced Continuous Mode Operation: 300kHz to 2.2MHz
• Low Dropout: 360mV at 0.5A
• Low EMI
• High Efficiency Synchronous Operation:
  • 92% Efficiency at 0.5A, 5V_OUT from 12V_IN
  • 90% Efficiency at 0.5A, 3.3V_OUT from 12V_IN
• Accurate 1V Enable Pin Threshold
• Internal Soft-Start and Compensation
• Power Good Flag
• Small Thermally Enhanced 16-Lead MSOP Package and 10-Lead (3mm × 3mm) DFN Packages
• AEC-Q100 Qualified for Automotive Applications

• 12V Automotive Systems
• 12V and 24V Commercial Vehicles
• 48V Electric and Hybrid Vehicles
• Industrial Supplies

The LT8619-5 is a compact, high efficiency, high speed synchronous monolithic step-down switching regulator that consumes only 6μA of quiescent current. The LT8619-5 can deliver 1.2A 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 to 10mV_P-P. A SYNC pin allows forced continuous mode operation synchronized to an external clock. 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 LT8619-5, reducing the input supply current to below 0.6μA. The PG flag signals when V_OUT is within ±7.5% of the programmed output voltage. The LT8619-5 is available in a small 16-lead MSOP with exposed pad for low thermal resistance.