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R7985A：2 A step-down switching regulator

The R7985A is a step-down switching regulator with a 2.5 A (minimum) current limited embedded power MOSFET, so it is able to deliver up to 2 A current to the load depending on the application conditions.

The input voltage can range from 4.5 V to 38 V, while the output voltage can be set starting from 0.6 V to V_IN.

Requiring a minimum set of external components, the device includes an internal 250 kHz switching frequency oscillator that can be externally adjusted up to 1 MHz. The large ambient temperature range makes it ideal for aerospace and defense applications.

The HSOP8 package with exposed pad allows the reduction of R_th(JA)down to 40 °C/W.

Key Features

• General features
  • 2 A DC output current
  • 4.5 V to 38 V input voltage
  • Output voltage adjustable from 0.6 V
  • Large ambient temperature range: -40 °C to 125 °C
  • 250 kHz switching frequency, programmable up to 1 MHz
  • Internal soft-start and enable
  • Low dropout operation: 100% duty cycle
  • Voltage feed-forward
  • Zero load current operation
  • Overcurrent and thermal protection
  • HSOP8 package
• 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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