Features

• Processed in Compliance with LTC Certified MIL-PRF-38535 Class V Flow
• High Voltage Operation: Up to 60V
• Output Voltages Up to 36V
• Synchronizable Up to 600kHz
• Adjustable Constant Frequency:  - 100kHz to 500kHz
• 100μA Shutdown Supply Current
• Capable of Driving Large Power MOSFETs
• Short-Circuit Protection and Soft-Start

Radiation Performance

• Total Ionizing Dose (TID) Tolerance, per TM1019.8, MIL-STD-883:
  - 200kRad (Si), per condition A at 50Rads(Si)/sec
  - 100kRad (Si), per condition D at 10mRads(Si)/sec
  - ELDRS Pass 100kRad(Si)
• Displacement Damage Defect (DDD) up to 1E12 Neutrons/cm2
• Single Event Transient (SET), Single Event Upset (SEU) and Single Event Latchup (SEL) tests up to a Linear Energy Transfer (LET) of 117.6 MeV.cm2 /mg to case temperatures of 100°C

Typical Application

Description

The RH3845 is a high voltage, synchronous, current mode controller used for medium to high power, high efficiency supplies. It offers a wide 4V to 60V input range (7.5V minimum start-up voltage). An onboard regulator simplifies the biasing requirements by providing IC power directly from V_IN.

Light load efficiency is also improved with the reverse inductor current inhibit function which supports discontinuous operation.  BurstMode® is not available in the space version of the part

Additional features include adjustable fixed operating frequency that can be synchronized to an external clock for noise sensitive applications, gate drivers capable of driving large N-channel MOSFETs, a precision undervoltage lockout, short-circuit protection and a programmable soft-start.

Third Party Vendor Availability

Linear Technology partners with third party vendors who assemble and test packaged products with LTC RH Dice inside