LM5085SDE/NOPB Part Information

Details for LM5085SDE/NOPB by Texas Instruments

Electronic & Electrical Components > Semiconductors - ICs > Power Management

Part Description

The LM5085 is a high efficiency PFET switching regulator controller that can be used to quickly and easily develop a small, efficient buck regulator for a wide range of applications. This high voltage controller contains a PFET gate driver and a high voltage bias regulator which operates over a wide 4.5-V to 75-V input range. The constant on-time regulation principle requires no loop compensation, simplifies circuit implementation, and results in ultrafast load transient response. The operating frequency remains nearly constant with line and load variations due to the inverse relationship between the input voltage and the on-time. The PFET architecture allows 100% duty cycle operation for a low dropout voltage. Either the RDS(ON) of the PFET or an external sense resistor can be used to sense current for overcurrent detection.

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Part Features

  • Adjustable Current Limit Using RDS(ON) or a Current Sense Resistor
  • Adjustable Output Voltage from 1.25 V
  • Capable of 100% Duty Cycle Operation
  • Integrated High Voltage Bias Regulator
  • Internal Soft-start Timer
  • LM5085-Q1 is an Automotive Grade Product that is AEC-Q100 Grade 1 Qualified (u201340u00b0C to 125u00b0C Operating Junction Temperature)
  • Nearly Constant Operating Frequency with Line and Load Variations
  • No Loop Compensation Required
  • Package:
  • Precision u00b12% Feedback Reference
  • Programmable Switching Frequency to 1MHz
  • Thermal Shutdown
  • Ultra-Fast Transient Response
  • Wide 4.5-V to 75-V Input Voltage Range

Part Specifications

Primary Input Voltage 75V
No. of Outputs 1
Output Voltage 75V
Output Current 500mA
No. of Pins 8
Operating Temperature Range -40°C to +125°C
MSL MSL 1 - Unlimited
RoHS Compliant

Alternative Part Descriptions

  • 4.5-75V Wide Vin, Constant On-Time Non-Synchronous PFET Buck Controller | Texas Instruments

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