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Linear Technology Corporation

The LT6658 "Refulator" is a precision voltage reference that offers high precision with high current capability. With two isolated outputs and separate supply pins, it provides outstanding power supply rejection and noise reduction. This versatile device eliminates the need for a regulator and simplifies board layout, making it an ideal choice for a wide range of applications.

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Linear Technology Corporation

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  1. Linear Technology Corporation LT6658 Precision Voltage References Drives up to 200mA Greg Zimmer

  2. Introducing the LT6658 “Refulator”Precision Voltage Reference with Dual High Current Output Buffers

  3. Combining Voltage Reference with Output BuffersWhy is the LT6658 Unique? • Offers Very High Precision with High Current Capability • Allows the ability to drive multiple circuits with a single reference • Allows the ability to operate as a precision voltage regulator • Offers significantly better load regulation than most voltage references • Offers Excellent AC Performance • Offers significant improvement over an op amp buffer that can become unstable • Can drive large capacitive loads (such as ADCs) without ringing or instability • Includes Two Isolated Outputs with Separate Supply Pins • The channel-to-channel isolation ensures noise on one output does not affect other • Ensures outstanding Power Supply Rejection (PSRR) • Tracking • Includes Two Functions in a Single Package • Eliminates a regulator (includes supporting components, board space and routing) • Localizes the power distribution to a single IC and simplifies board layout • Offers cost savings

  4. A Comprehensive Set of FeaturesProvides the Flexibility to Address Many Applications Wide Supply Range 5V up to 36V Separate Supply Inputs for Output Buffers Output Buffer Disable • -20mA to 50mA • Output • -20mA to 150mA • Output Internal 2.5V Precision Voltage Reference Output Sense Pins Used to Set Output Voltage from 2.5V to 6V Noise Reduction Band Limits Voltage Reference Noise

  5. LT6658 Features and Benefits

  6. ApplicationsCommon Configurations Separately Driving Reference Inputs and Supply Voltages Both Output Buffers Set for Gain=1 Combining Outputs for Maximum Output Current Programming Output Voltages (5V & 4.096V)

  7. The LT6658 Refulator SummarySummary Two Outputs • Source Current...............................................150mA and 50mA • Sink Current.................................................... 20mA Temperature Drift .....................................................10ppm/°C Accuracy...................................................................0.05% Load Regulation.......................................................0.1ppm/mA Output Tracking...................................................... ±150uV PSRR.........................................................................> 100dB at 10Hz Low Frequency Noise (0.1hz to 10Hz).................... 1.5ppm Maximum Supply......................................................36V Noise Reduction.......................................................YES Output Disable..........................................................YES Current Protection................................................... YES Thermal Protection..................................................YES Small Footprint.........................................................YES Temperature Range................................................. -40°C to 125°C

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