LT3083 - Adjustable 3A Single Resistor Low Dropout Regulator

The LT3083 is a 3A low dropout linear regulator that can be paralleled to increase output current or spread heat on surface mounted boards. Architected 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 310mV—when used with multiple supplies.

A key feature of the LT3083 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 23V (DD-PAK and TO-220 packages). The LT3083 is stable with 10μF of capacitance on the output, and the IC is stable with 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 LT3083 is offered in the 16-lead TSSOP (with an exposed pad for better thermal characteristics), 12-lead 4mm × 4mm DFN (also with an exposed pad), 5-lead TO-220, and 5-lead surface mount DD-PAK packages.

Features
  • Outputs May be Paralleled for Higher Current and Heat Spreading
  • Output Current: 3A
  • Single Resistor Programs Output Voltage
  • 50μA Set Pin Current: 1% Initial Accuracy
  • Output Adjustable to 0V
  • Low Output Noise: 40μVRMS (10Hz to 100kHz)
  • Wide Input Voltage Range: 1.2V to 23V (DD-Pak and TO-220 Packages)
  • Low Dropout Voltage: 310mV
  • <1mV Load Regulation
  • <0.001%/V Line Regulation
  • Minimum Load Current: 1mA
  • Stable with Minimum 10μF Ceramic Capacitor
  • Current Limit with Foldback and Overtemperature Protection
  • Available in 16-Lead TSSOP, 12-Lead 4mm × 4mm DFN, 5-Lead TO-220 and 5-Lead Surface Mount DD-PAK Packages
Typical Application
LT3083 Typical Application
LT3083 Typical Application
Applications
  • 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
Packaging
LT3083 Package Drawing
LT3083 Package Drawing
LT3083 Package Drawing
LT3083 Package Drawing
Order Information
Part NumberPackageTempPrice(1-99)Price (1k)*
LT3083EDF#PBF4x4 DFN-12E$5.43$3.80
LT3083EDF#TRPBF4x4 DFN-12E$3.86
LT3083EFE#PBFTSSOP-16E$5.62$3.93
LT3083EFE#TRPBFTSSOP-16E$3.99
LT3083EQ#PBFDDPAK-5E$5.90$4.13
LT3083EQ#TRPBFDDPAK-5E$4.19
LT3083ET#PBFTO-220E$5.90$4.13
LT3083IDF#PBF4x4 DFN-12I$6.29$4.40
LT3083IDF#TRPBF4x4 DFN-12I$4.46
LT3083IFE#PBFTSSOP-16I$6.47$4.53
LT3083IFE#TRPBFTSSOP-16I$4.59
LT3083IQ#PBFDDPAK-5I$6.76$4.73
LT3083IQ#TRPBFDDPAK-5I$4.79
LT3083IT#40PBFTO-220I$7.21$5.18
LT3083IT#PBFTO-220I$6.76$4.73
LT3083IT#TRPBFTO-220I$4.79
LT3083MPDF4x4 DFN-12MP$14.66$10.26
LT3083MPDF#PBF4x4 DFN-12MP$14.66$10.26
LT3083MPDF#TR4x4 DFN-12MP$14.72$10.32
LT3083MPDF#TRPBF4x4 DFN-12MP$14.72$10.32
LT3083MPFETSSOP-16MP$15.17$10.62
LT3083MPFE#PBFTSSOP-16MP$15.17$10.62
LT3083MPFE#TRPBFTSSOP-16MP$10.68
LT3083MPQDDPAK-5MP$15.94$11.16
LT3083MPQ#PBFDDPAK-5MP$15.94$11.16
LT3083MPQ#TRDDPAK-5MP$16.00$11.22
LT3083MPQ#TRPBFDDPAK-5MP$16.00$11.22
LT3083MPT#PBFTO-220MP$15.94$11.16
LT3083MPT#TRPBFTO-220MP$11.22
Demo Boards
Part NumberDescriptionPrice
DC1585ALT3083EQ Demo Board | Single Resistor Prog Low Dropout Linear Regulator, 1.7V ≤ VIN ≤ 23V, Vout = 1.2V/1.5V/1.8V/2.5V/3.3V/5.0V @ 3A$175.00
Datasheet
Reliability Data
Product Selector Card
LT Journal
Press Release
CAD Symbol
Ad
LTspice
Related Products
LT3083 - Adjustable 3A Single Resistor Low Dropout Regulator
多个 3A 线性稳压器并联可分散功耗和热量
大电流 LDO 应用具增强的热性能以减少了热点
表面贴装 3A LDO 非常容易并联,在不产生任何热点的情况下提供大的 IOUT
R531 - Reliability Data
New 3-Terminal Regulators Add Functionality
New Linear Regulators Solve Old Problems
Surface Mount 3A LDO is Easily Paralleled for High IOUT without Any Hot Spots
LT3083 Footprints and Symbols
Not Your Dad's LDO
LT3083 Demo Circuit - Single Resistor Low Dropout Regulator (10V to 6.0V@3A)
LT8614/LT3083 Demo Circuit - Hybrid Wide Dimming Ratio Linear LED Current Controller (3.4-42V to 41V @ 3A Max)
XML 地图 | Sitemap 地图