LT1185
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LT1185

Low Dropout Regulator

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LTspice LT1185 Demo Circuit - Negative Regulator with 3.5A Current Limit (6-16V to -5V @ 3A) Download 1.00KB LTspice LT1185 - LDO Linear Regulators Download 1.09 KB
Part Models 12
1ku List Price Starting From $4.75
Features
  • Low Resistance Pass Transistor: 0.25Ω
  • Dropout Voltage: 0.75V at 3A
  • ±1% Reference Voltage
  • Accurate Programmable Current Limit
  • Shutdown Capability
  • Internal Reference Available
  • Full Remote Sense
  • Low Quiescent Current: 2.5mA
  • Good High Frequency Ripple Rejection
  • Available in 5-Lead TO-220 and DD Packages
Additional Details
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The LT1185 is a 3A low dropout regulator with adjustable current limit and remote sense capability. It can be used as a positive output regulator with floating input or as a standard negative regulator with grounded input. The output voltage range is 2.5V to 25V, with ±1% accuracy on the internal reference voltage.

The LT1185 uses a saturation-limited NPN transistor as the pass element. This device gives the linear dropout characteristics of a FET pass element with significantly less die area. High efficiency is maintained by using special anti-saturation circuitry that adjusts base drive to track load current. The “on resistance” is typically 0.25Ω.

Accurate current limit is programmed with a single 1/8W external resistor, with a range of zero to three amperes. A second, fixed internal limit circuit prevents destructive currents if the programming current is accidentally over-ranged. Shutdown of the regulator output is guaranteed when the program current is less than 1µA, allowing external logic control of output voltage.

The LT1185 has all the protection features of our previous regulators, including power limiting and thermal shutdown.

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file View Data Sheet
Documentation View All Documentation
LTspice LT1185 Demo Circuit - Negative Regulator with 3.5A Current Limit (6-16V to -5V @ 3A) Download 1.00KB LTspice LT1185 - LDO Linear Regulators Download 1.09 KB
Part Models 12
1ku List Price Starting From $4.75
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LT1185

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Data Sheet

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UPDATED 08/28/2007
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LT1185: Low Dropout Regulator Data Sheet

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Application Note

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UPDATED 08/20/2007
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AN46 - Efficiency and Power Characteristics of Switching Regulator Circuits redirect icon

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Reliability Data

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UPDATED 03/26/2018
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R006 Reliability Data redirect icon

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Documentation

Documentation

ADI has always placed the highest emphasis on delivering products that meet the maximum levels of quality and reliability. We achieve this by incorporating quality and reliability checks in every scope of product and process design, and in the manufacturing process as well. "Zero defects" for shipped products is always our goal. View our quality and reliability program and certifications for more information.

Part Model Pin/Package Drawing Documentation CAD Symbols, Footprints, and 3D Models
LT1185CQ#PBF 5-Lead DD Pak external-link
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LT1185CQ#TRPBF 5-Lead DD Pak external-link
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  • Material Declaration external-link
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  • Reliablity Data external-link
LT1185CT#06PBF 5-Lead TO-220 (Flow 06) external-link
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  • Material Declaration external-link
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  • Reliablity Data external-link
LT1185CT#30PBF 5-Lead TO-220 (Flow 30) external-link
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  • Material Declaration external-link
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  • Reliablity Data external-link
LT1185CT#33PBF 5-Lead TO-220 (Flow 33) external-link
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  • Material Declaration external-link
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LT1185CT#PBF 5-Lead TO-220 external-link
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LT1185IQ#PBF 5-Lead DD Pak external-link
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  • Material Declaration external-link
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LT1185IQ#TRPBF 5-Lead DD Pak external-link
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  • Material Declaration external-link
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  • Reliablity Data external-link
LT1185IT#06PBF 5-Lead TO-220 (Flow 06) external-link
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  • Material Declaration external-link
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  • Reliablity Data external-link
LT1185IT#30PBF 5-Lead TO-220 (Flow 30) external-link
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  • Material Declaration external-link
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LT1185IT#31PBF 5-Lead TO-220 (Flow 31) external-link
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LT1185IT#PBF 5-Lead TO-220 external-link
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Laser Top Mark Conversion for DDPAK & TO220 Packages Assembled in ADPG. Country of Origin Code [MY] To Be Incorporated On Top Mark

LT1185CQ#PBF

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

LT1185CQ#PBF

PRODUCTION

LT1185CQ#TRPBF

PRODUCTION

LT1185CT#06PBF

PRODUCTION

LT1185CT#30PBF

PRODUCTION

LT1185CT#33PBF

PRODUCTION

LT1185CT#PBF

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LT1185IQ#PBF

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LT1185IQ#TRPBF

PRODUCTION

LT1185IT#06PBF

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LT1185IT#30PBF

PRODUCTION

LT1185IT#31PBF

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PRODUCTION

pdf

PCN22_0175_Form

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xls

Material_Report

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xlsm

Delta Qualification Matrix

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Software & Part Ecosystem

Software & Part Ecosystem

Parts Product Life Cycle Description

Negative Linear Regulators (LDO)1
LT3015 Series
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1.5A, Low Noise, Negative Linear Regulator with Precision Current Limit

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.

spice tool Lt Spice

LT1185 Demo Circuit - Negative Regulator with 3.5A Current Limit (6-16V to -5V @ 3A) Download

1.00K

spice tool Lt Spice

LT1185 - LDO Linear Regulators Download

1.09 K

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