LT3091
Info : RECOMMENDED FOR NEW DESIGNS
searchIcon
cartIcon

LT3091

–36V, 1.5A Negative Linear Regulator with Programmable Current Limit

Show More showmore-icon

Info : RECOMMENDED FOR NEW DESIGNS tooltip
Info : RECOMMENDED FOR NEW DESIGNS tooltip
Part Details
Part Models 28
1ku List Price Starting From $3.45
Features
  • Output Current: 1.5A
  • 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 a 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 1.5A)
  • Stable with 10μF Minimum Output Capacitor
  • Stable with Ceramic or Tantalum Capacitors
  • Thermally Enhanced 14-Lead 4mm × 3mm DFN, 16-Lead TSSOP, 7-Lead TO-220 and DD Packages
Additional Details
show more Icon

The LT3091 is a 1.5A, low dropout negative linear regulator that is easily paralleled 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 LT3091 features fast transient response, high PSRR and output noise as low as 18μVRMS. The LT3091 generates a wide output voltage range (0V to –32V) while maintaining unity gain operation. This yields virtually constant bandwidth, load regulation, PSRR and noise, independent of the programmed output voltage.

The LT3091 supplies 1.5A at a typical dropout voltage of 300mV. Operating quiescent current is nominally 1.2mA and drops to << 1μA in shutdown. A single resistor adjusts the LT3091’s precision programmable current limit. The device’s positive or negative current monitor either sources a current (0.25mA/A) or sinks a current (0.5mA/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 28
1ku List Price Starting From $3.45

close icon
Documentation

Documentation

Part Model Pin/Package Drawing Documentation CAD Symbols, Footprints, and 3D Models
LT3091EDE#PBF
  • HTML
  • HTML
LT3091EDE#TRPBF
  • HTML
  • HTML
LT3091EFE#PBF
  • HTML
  • HTML
LT3091EFE#TRPBF
  • HTML
  • HTML
LT3091ER#PBF
  • HTML
  • HTML
LT3091ER#TRPBF
  • HTML
  • HTML
LT3091ET7#PBF
  • HTML
  • HTML
LT3091HDE#PBF
  • HTML
  • HTML
LT3091HDE#TRPBF
  • HTML
  • HTML
LT3091HFE#PBF
  • HTML
  • HTML
LT3091HFE#TRPBF
  • HTML
  • HTML
LT3091HR#PBF
  • HTML
  • HTML
LT3091HR#TRPBF
  • HTML
  • HTML
LT3091HT7#PBF
  • HTML
  • HTML
LT3091IDE#PBF
  • HTML
  • HTML
LT3091IDE#TRPBF
  • HTML
  • HTML
LT3091IFE#PBF
  • HTML
  • HTML
LT3091IFE#TRPBF
  • HTML
  • HTML
LT3091IR#PBF
  • HTML
  • HTML
LT3091IR#TRPBF
  • HTML
  • HTML
LT3091IT7#PBF
  • HTML
  • HTML
LT3091MPDE#PBF
  • HTML
  • HTML
LT3091MPDE#TRPBF
  • HTML
  • HTML
LT3091MPFE#PBF
  • HTML
  • HTML
LT3091MPFE#TRPBF
  • HTML
  • HTML
LT3091MPR#PBF
  • HTML
  • HTML
LT3091MPR#TRPBF
  • HTML
  • HTML
LT3091MPT7#PBF
  • HTML
  • HTML

Filter by Model

reset

Reset Filters

Part Models

Product Lifecycle

PCN

Apr 6, 2022

- 22_0068

Laser Top Mark for ETSSOP and TSSOP Packages Assembled in ADPG [PNG] and UTL

LT3091EFE#PBF

PRODUCTION

LT3091EFE#TRPBF

PRODUCTION

LT3091HFE#PBF

PRODUCTION

LT3091HFE#TRPBF

PRODUCTION

LT3091IFE#PBF

PRODUCTION

LT3091IFE#TRPBF

PRODUCTION

LT3091MPFE#PBF

PRODUCTION

LT3091MPFE#TRPBF

PRODUCTION

Aug 10, 2022

- 22_0175

Laser Top Mark Conversion for DDPAK & TO220 Packages Assembled in ADPG. Country of Origin Code [MY] To Be Incorporated On Top Mark

LT3091ER#PBF

PRODUCTION

LT3091ER#TRPBF

PRODUCTION

LT3091ET7#PBF

PRODUCTION

LT3091HR#PBF

PRODUCTION

LT3091HR#TRPBF

PRODUCTION

LT3091HT7#PBF

PRODUCTION

LT3091IR#PBF

PRODUCTION

LT3091IR#TRPBF

PRODUCTION

LT3091IT7#PBF

PRODUCTION

LT3091MPR#PBF

PRODUCTION

LT3091MPR#TRPBF

PRODUCTION

LT3091MPT7#PBF

PRODUCTION

Filter by Model

reset

Reset Filters

Part Models

Product Lifecycle

PCN

Apr 6, 2022

- 22_0068

arrow down

Laser Top Mark for ETSSOP and TSSOP Packages Assembled in ADPG [PNG] and UTL

LT3091EFE#PBF

PRODUCTION

LT3091EFE#TRPBF

PRODUCTION

LT3091HFE#PBF

PRODUCTION

LT3091HFE#TRPBF

PRODUCTION

LT3091IFE#PBF

PRODUCTION

LT3091IFE#TRPBF

PRODUCTION

LT3091MPFE#PBF

PRODUCTION

LT3091MPFE#TRPBF

PRODUCTION

Aug 10, 2022

- 22_0175

arrow down

Laser Top Mark Conversion for DDPAK & TO220 Packages Assembled in ADPG. Country of Origin Code [MY] To Be Incorporated On Top Mark

LT3091ER#PBF

PRODUCTION

LT3091ER#TRPBF

PRODUCTION

LT3091ET7#PBF

PRODUCTION

LT3091HR#PBF

PRODUCTION

LT3091HR#TRPBF

PRODUCTION

LT3091HT7#PBF

PRODUCTION

LT3091IR#PBF

PRODUCTION

LT3091IR#TRPBF

PRODUCTION

LT3091IT7#PBF

PRODUCTION

LT3091MPR#PBF

PRODUCTION

LT3091MPR#TRPBF

PRODUCTION

LT3091MPT7#PBF

PRODUCTION

Software & Part Ecosystem

Software & Part Ecosystem

Evaluation Kit

Evaluation Kits 1

reference details image

DC2276A

LT3091EDE Demo Board | Negative LDO with Programmable Current Limit, –1.5V ≤ VIN ≤ –36V, VOUT = –1.25V/–2.5V/–5V/–12V/–15V @ 1.5A

zoom

DC2276A

LT3091EDE Demo Board | Negative LDO with Programmable Current Limit, –1.5V ≤ VIN ≤ –36V, VOUT = –1.25V/–2.5V/–5V/–12V/–15V @ 1.5A

LT3091EDE Demo Board | Negative LDO with Programmable Current Limit, –1.5V ≤ VIN ≤ –36V, VOUT = –1.25V/–2.5V/–5V/–12V/–15V @ 1.5A

Product Detail

Demonstration circuit DC2276A is a 1.5A low dropout negative linear regulator featuring the LT3091. This device is designed for applications requiring a negative output voltage, output adjustability from –32V down to 0V, and low dropout voltage. The input voltage range is –1.5V to –36V and the output voltage is jumper selectable and can be set to –1.25V, –2.5V, –5V, –12V or –15V.


The LT3091 features fast transient response, high PSRR and output noise as low as 18µVRMS. A single resistor adjusts the LT3091’s precision programmable current limit. The LT3091’s positive or negative current monitor either sources a current (0.25mA/A) or sinks a current (0.5mA/A) proportional to output current.

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.

Recently Viewed