LT3090
Info : RECOMMENDED FOR NEW DESIGNS
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LT3090

–36V, 600mA Negative Linear Regulator with Programmable Current Limit

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Info : RECOMMENDED FOR NEW DESIGNS tooltip
Info : RECOMMENDED FOR NEW DESIGNS tooltip
Part Details
Part Models 16
1ku List Price Starting From $2.60
Features
  • Output Current: 600mA
  • Single Resistor Sets Output Voltage
  • 50μA SET Pin Current: ±1% Initial Accuracy
  • Programmable Current Limit
  • Positive or Negative Output Current Monitor
  • Parallelable for Higher Current and Heat Spreading
  • Low Dropout Voltage: 300mV
  • Low Output Noise: 18μVRMS (10Hz to 100kHz)
  • Configurable as 3-Terminal Floating Regulator
  • Wide Input Voltage Range: –1.5V to –36V
  • Rail-to-Rail Output Voltage Range: 0V to –32V
  • Positive/Negative Shutdown Logic or UVLO
  • Programmable Cable Drop Compensation
  • Load Regulation: 1.2mV (1mA to 600mA)
  • Stable with 4.7μF Minimum Output Capacitor
  • Stable with Ceramic or Tantalum Capacitors
  • Thermally Enhanced 12-Lead MSOP and 10-Lead 0.75mm × 3mm × 3mm DFN Packages
Additional Details
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The LT3090 is a 600mA, low dropout negative linear regulator that is easily parallelable to increase output current or spread heat on surface mounted boards. Designed with a precision current reference followed by a high performance rail-to-rail voltage buffer, this regulator finds use in applications requiring precision output, high current with no heat sink, output adjustability to zero and low dropout voltage. The device can also be configured as a 3-terminal floating regulator.

The LT3090 features fast transient response, high PSRR and output noise as low as 18μVRMS. The LT3090 generates a wide output voltage range (0V to –32V) while maintaining unity gain operation. This yields virtually constant bandwidth, load regulation, PSRR and noise, regardless of the programmed output voltage.

The LT3090 supplies 600mA at a typical dropout voltage of 300mV. Operating quiescent current is nominally 1mA and drops to << 1μA in shutdown. A single resistor adjusts the LT3090’s precision programmable current limit. The LT3090’s positive or negative current monitor either sources a current (0.5mA/A) or sinks a current (1mA/A) proportional to output current. Built-in protection includes reverse output protection, internal current limit with foldback and thermal shutdown with hysteresis.

Applications

  • Post Regulator for Switching Supplies
  • Low Noise Instrumentation and RF Supplies
  • Rugged Industrial Supplies
  • Precision Power Supplies
Part Models 16
1ku List Price Starting From $2.60

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Documentation

Documentation

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Product Lifecycle

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Feb 4, 2020

- 20_0129

Laser Mark Conversion for 12-Lead MSOP Packages Assembled in ADPG and UTAC

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Feb 4, 2020

- 20_0129

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Laser Mark Conversion for 12-Lead MSOP Packages Assembled in ADPG and UTAC

LT3090EMSE#PBF

PRODUCTION

LT3090EMSE#TRPBF

PRODUCTION

LT3090HMSE#PBF

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LT3090HMSE#TRPBF

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Software & Part Ecosystem

Software & Part Ecosystem

Evaluation Kit

Evaluation Kits 1

reference details image

DC1948A

LT3090 Demo Board | Negative Linear Regulator with Prog Current Limit, -1.5V ≤ VIN ≤ -36V, VOUT = -1.25V/-2.5V/-5V/-12V/-15V/-18V @ 600mA

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DC1948A

LT3090 Demo Board | Negative Linear Regulator with Prog Current Limit, -1.5V ≤ VIN ≤ -36V, VOUT = -1.25V/-2.5V/-5V/-12V/-15V/-18V @ 600mA

LT3090 Demo Board | Negative Linear Regulator with Prog Current Limit, -1.5V ≤ VIN ≤ -36V, VOUT = -1.25V/-2.5V/-5V/-12V/-15V/-18V @ 600mA

Product Detail

Demonstration circuit 1948A is a 600mA low dropout negative linear regulator featuring the LT3090. This device is designed for applications requiring negative output voltage, high current with no heat sink, output adjustability to zero and low dropout voltage. The LT3090 features fast transient response, high PSRR and low output noise. The LT3090 supplies 600mA at a typical dropout voltage of 300mV. Operating quiescent current is nominally 1mA and drops to << 1μA in shutdown. A single resistor adjusts the LT3090’s precision programmable current limit. The LT3090’s positive or negative current monitor either sources a current (0.5mA/A) or sinks a current (1mA/A) proportional to output current. Built-in protection includes reverse output protection, internal current limit with foldback and thermal shutdown with hysteresis.

Tools & Simulations

Tools & Simulations 1

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.

To launch ready-to-run LTspice demonstration circuits for this part:

Step 1: Download and install LTspice on your computer.

Step 2: Click on the link in the section below to download a demonstration circuit.

Step 3: If LTspice does not automatically open after clicking the link below, 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.

Reference Designs

Reference Designs 2

Figure 1. CN0554 Simplified Block Diagram

±10 V Analog Input and ±15 V Analog Output for Raspberry Pi Platforms

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CN0554

±10 V Analog Input and ±15 V Analog Output for Raspberry Pi Platforms

CN0554

Circuits from the lab

tooltip Info:Circuits from the lab
±10 V Analog Input and ±15 V Analog Output for Raspberry Pi Platforms

Features and Benefits

  • 8-Psuedo differential inputs or 16-Single-ended inputs
  • Selectable Input Voltage range, up to ±13 V
  • 16 Single-ended Outputs
  • Up to ±15 V Outputs
  • All Power Rails Derived from the Raspberry Pi
View Detailed Reference Design external link

Design & Integration Tools

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3.71 M

Videos

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Feb 17, 2023

01:00

CN0554: 10V Analog Input and 15V Analog Output for Raspberry Pi

Figure 1. CN0511 Functional Block Diagram

DC to 5.5 GHz Signal Generator with +/-0.5 dB Calibrated Output Power

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CN0511

DC to 5.5 GHz Signal Generator with +/-0.5 dB Calibrated Output Power

CN0511

Circuits from the lab

tooltip Info:Circuits from the lab
DC to 5.5 GHz Signal Generator with +/-0.5 dB Calibrated Output Power

Features and Benefits

  • DC to 5.5 GHz Single Tone Generator
  • +/- 0.5 dB  Wideband Amplitude Calibration from 0 dBm to -40 dBm
  • 48-Bit Frequency Tuning Resolution (~43 uHz)
  • Onboard VCXO for Quick Bring Up
  • Compatible with Raspberry Pi 3B+, 4, Zero W, Zero 2W
View Detailed Reference Design external link

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