LT3085

RECOMMENDED FOR NEW DESIGNS

Adjustable 500mA Single Resistor Low Dropout Regulator

Part Models
14
1ku List Price
Starting From $2.10
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Part Details

  • Outputs May be Paralleled for Higher Current and Heat Spreading
  • Output Current: 500mA
  • Single Resistor Programs Output Voltage
  • 1% Initial Accuracy of SET Pin Current
  • Output Adjustable to 0V
  • Current Limit Constant with Temperature
  • Low Output Noise: 40μVRMS (10Hz to 100kHz)
  • Wide Input Voltage Range: 1.2V to 36V
  • Low Dropout Voltage: 275mV
  • < 1mV Load Regulation
  • < 0.001%/V Line Regulation
  • Minimum Load Current: 0.5mA
  • Stable with Minimum 2.2μF Ceramic Capacitor
  • Current Limit with Foldback and Overtemperature Protected
  • 8-Lead MSOP, and 6-Lead 2mm × 3mm DFN Packages
  • AEC-Q100 Qualified for Automotive Applications
LT3085
Adjustable 500mA Single Resistor Low Dropout Regulator
LT3085 Application Circuit LT3085 Pin Configuration LT3085 Pin Configuration LT3085 Performance Graph
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Hardware Ecosystem

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Positive Linear Regulators (LDO) 1
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Silicon Oscillators 1
LTC6902 PRODUCTION Multiphase Oscillator with Spread Spectrum Frequency Modulation
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Tools & Simulations

LTspice

LTspice® is a powerful, fast and free simulation software, schematic capture and waveform viewer with enhancements and models for improving the simulation of analog circuits.


Evaluation Kits

eval board
DC1401A

LT3085EDCB Demo Board | Single Resistor, Low Dropout Regulator, 1.7V ≤ VIN ≤ 25V, VOUT = 1.2V/1.8V/2.5V/3.3V/5V/Adjustable @ 500mA

Product Details

Demonstration circuit 1401A is an adjustable 500mA linear regulator featuring the LT3085. Architected as a precision current source and voltage follower, the LT3085 can be used in many applications requiring up to 500mA output current, adjustability down to 0V at the output and no heat sink. The device brings out the collector of the pass transistor to allow low dropout operation when used with multiple supplies. The demo board operates with an input voltage range from 1.7V to 25V (the maximum output voltage is limited by the output capacitor's voltage rating) and provides a jumper-selectable output voltage of 1.2V, 1.8V, 2.5V, 3.3V, 5V or a user-defined value.


For the LT3085 to regulate properly, the voltage on the control pin (VCONTROL) must be more than approximately 1.2V greater than the output voltage.


 


 


DC1401A
LT3085EDCB Demo Board | Single Resistor, Low Dropout Regulator, 1.7V ≤ VIN ≤ 25V, VOUT = 1.2V/1.8V/2.5V/3.3V/5V/Adjustable @ 500mA
DC1401A Evaluation Board DC1401A Evaluation Board - Top View DC1401A Evaluation Board - Bottom View DC1401A - Schematic

Reference Designs

DK-DEV-5CGTD9N Dev Kit
Altera Cyclone V GT FPGA Development Kit Circuits from the lab

Features and Benefits

  • Analog Devices has worked closely with FPGA and processor manufacturers to develop verified power solutions that optimize cost, size and efficiency in high performance applications
  • Our reference designs are supported by an intuitive design tool set and IP
  • Our team can provide designs for quick prototypes that can speed time to market in the most complex applications
SoCKit Dev Kit
Arrow/Terasic SoCKit Development Kit Circuits from the lab

Features and Benefits

  • Analog Devices has worked closely with FPGA and processor manufacturers to develop verified power solutions that optimize cost, size and efficiency in high performance applications
  • Our reference designs are supported by an intuitive design tool set and IP
  • Our team can provide designs for quick prototypes that can speed time to market in the most complex applications
Stratix 10 GX Signal Integrity Development Kit
Stratix 10 GX Signal Integrity Development Kit Circuits from the lab

Features and Benefits

  • Analog Devices has worked closely with Intel PSG to develop verified power solutions that optimize cost, size and efficiency in high performance applications.
  • The validated power solutions include uModules power products that address time and space constraints while delivering high efficiency, reliability, and low noise.
  • The actual power tree represents the best solution at time of design.
  • A recommended power tree has also been included to present the ideal solution at time of Stratix 10 GX SI development kit release. An updated alternate version of the power tree represents the latest solutions available from Analog Devices. For many applications, an intermediate rail is not ideal, so recommendations for an alternate power tree that allows for direct power conversion from 12V input is provided below.
DE1-SoC Dev Kit
Terasic DE1-SoC Development Kit Circuits from the lab

Features and Benefits

  • Analog Devices has worked closely with FPGA and processor manufacturers to develop verified power solutions that optimize cost, size and efficiency in high performance applications
  • Our reference designs are supported by an intuitive design tool set and IP
  • Our team can provide designs for quick prototypes that can speed time to market in the most complex applications
Altera Cyclone V GT FPGA Development Kit
DK-DEV-5CGTD9N Dev Kit
DK-DEV-5CGTD9N Block Diagram
DK-DEV-5CGTD9N Power Tree
DK-DEV-5CGTD9N Power Tree No TI DDR Regulator
Arrow/Terasic SoCKit Development Kit
SoCKit Dev Kit
SoCKit Block Diagram
SoCKit Development Kit Power Tree
Stratix 10 GX Signal Integrity Development Kit
Stratix 10 GX Signal Integrity Development Kit
Stratix 10 GX Signal Integrity Development Kit Block Diagram
Stratix 10 GX Signal Integrity Development Kit (Actual Power Tree representative of components used on board)
Stratix 10 GX Signal Integrity Development Kit (updated alternate Simplified Power Tree: 12Vin to required I/O voltages)
Terasic DE1-SoC Development Kit
DE1-SoC Dev Kit
DE1-SoC Block Diagram
DE1-SoC Power Tree

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