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R6986：38 V 2 A synchronous step-down switching regulator with 30 uA quiescent current

The R6986 device is a step-down monolithic switching regulator able to deliver up to 2 A DC. The output voltage adjustability ranges from 0.85 V to V_IN. The 100% duty cycle, the wide input voltage range and the large ambient temperature range make it ideal for aerospace and defense applications. The “Low Consumption Mode” (LCM) is designed for always-on applications, so it maximizes the efficiency at light load with controlled output voltage ripple. The “Low Noise Mode” (LNM) makes the switching frequency constant and minimizes the output voltage ripple overload current range. The output voltage supervisor manages the reset phase for any digital load (μC, FPGA.). The RST open collector output can also implement output voltage sequencing during the power-up phase. The synchronous rectification, designed for high efficiency at medium - heavy load, and the high switching frequency capability make the size of the application compact. Pulse by pulse current sensing on both power elements implements an effective constant current protection.

Key Features

• General features
  • 2 A DC output current
  • 4 V to 38 V operating input voltage
  • Large ambient temperature range: -40 °C to 125 °C
  • Low consumption mode or low noise mode
  • 30 μA IQ at light load (LCM VOUT = 3.3 V)
  • 8 μA IQ-SHTDWN
  • Adjustable fSW (250 kHz - 2 MHz)
  • Output voltage adjustable from 0.85 V to VIN
  • Embedded output voltage supervisor
  • Synchronization
  • Adjustable soft-start time
  • Internal current limiting
  • Overvoltage protection
  • Output voltage sequencing
  • Peak current mode architecture
  • RDSON HS = 180 mΩ, RDSON LS = 150 mΩ
  • Thermal shutdown
• Aerospace and defense features
  • Suitable for use in aerospace and defense applications
  • Dedicated traceability and part marking
  • Production parts approval documents available
  • Adapted extended life time and obsolescence management
  • Extended product change notification process
  • Designed and manufactured to meet sub-ppm quality goals
  • Advanced mold and frame designs for superior resilience in harsh environments (acceleration, EMI, thermal, humidity)
  • Extended screening capability on request

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