LT3085 - Adjustable 500mA Single Resistor Low Dropout Regulator
- 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
The LT3085 is a 500mA low dropout linear regulator that can be paralleled to increase output current or spread heat on surface mounted boards. Designed as a precision current source and voltage follower, this new regulator finds use in many applications requiring high current, adjustability to zero, and no heat sink. The device also brings out the collector of the pass transistor to allow low dropout operation—down to 275mV—when used with a second supply.
A key feature of the LT3085 is the capability to supply a wide output voltage range. By using a reference current through a single resistor, the output voltage is programmed to any level between zero and 36V. The LT3085 is stable with 2.2μF of capacitance on the output, and the IC uses small ceramic capacitors that do not require additional ESR as is common with other regulators.
Internal protection circuitry includes current limiting and thermal limiting. The LT3085 is offered in the 8-lead MSOP and a low profile (0.75mm) 6-lead 2mm × 3mmDFN package (both with an Exposed Pad for better thermal characteristics).
PackagingFor complete and up to date package information and drawings, please refer to our packaging page
- Part numbers ending in PBF are lead free. Please contact LTC marketing for information on lead based finish parts.
- Part numbers containing TR or TRM are shipped in tape and reel or 500 unit mini tape and reel, respectively
- Please refer to our general ordering information or the product datasheet for more details
Package Variations and Pricing
|Buy Now • Request Samples|
Demo BoardsLinear Technology offers many demo boards free of charge to qualified customers. Contact your local sales office or distributor to inquire about a demo board. Certain demo boards are also available for sale via credit card on this website. Demo boards are for evaluation purposes only. It remains the customer’s responsibility to verify proper and reliable operation in the actual end application.
|DC1401A||LT3085EDCB Demo Board | Single Resistor, Low Dropout Regulator, 1.7V ≤ VIN ≤ 25V, Vout = 1.2V/1.8V/2.5V/3.3V/5V/Adj @ 500mA||$75.00|
- High Current All Surface Mount Supply
- High Efficiency Linear Regulator
- Post Regulator for Switching Supplies
- Low Parts Count Variable Voltage Supply
- Low Output Voltage Power Supplies
People Who Viewed This Product Also Viewed
- LT3080 - Adjustable 1.1A Single Resistor Low Dropout Regulator
- LT1763 - 500mA, Low Noise, LDO Micropower Regulators
- LT3092 - 200mA 2-Terminal Programmable Current Source
- LT3083 - Adjustable 3A Single Resistor Low Dropout Regulator
- LT3082 - 200mA Single Resistor Low Dropout Linear Regulator
- LT3080-1 - Parallelable 1.1A Adjustable Single Resistor Low Dropout Regulator
- LT1761 - 100mA, Low Noise, LDO Micropower Regulators in TSOT-23
- LT3081 - 1.5A Single Resistor Rugged Linear Regulator with Monitors
- LT1963A Series - 1.5A, Low Noise, Fast Transient Response LDO Regulators
- LTC6655 - 0.25ppm Noise, Low Drift Precision References
Please login to your MyLinear account for notifications of datasheet updates, new document releases and LTspice model announcements for your favorite products. If you do not have a MyLinear account you may Sign Up Now.
LTspice® IV is a powerful, fast and free simulation tool, schematic capture and waveform viewer with enhancements and models for improving the simulation of switching regulators. Click here to download LTspice IV
To launch a ready to run LTspice demonstration circuit for this part:
- Step 1: If you have not installed LTspice on this computer, download and install LTspice IV
- Step 2: Once LTspice is installed, click on the link(s) below to launch the simulation
- Step 3: If LTspice IV does not automatically open after clicking the link above, you can instead run the simulation by right clicking on the link and selecting "Save Target As." After saving the file to your computer, start LTspice and open the demonstration circuit by selecting 'Open' from the 'File' menu
To explore other ready to run LTspice demonstration circuits, please visit our Demo Circuits Collection.
Models for the following parts are available in LTspice IV: