LT1009 Series - 2.5V Reference


Typical Application

LT1009 Typical Application
LT1009 Typical Application


The LT1009 is a precision trimmed 2.5V shunt regulator diode featuring a maximum initial tolerance of only ±5mV. The low dynamic impedance and wide operating current range enhances its versatility. The 0.2% reference tolerance is achieved by on-chip trimming which not only minimizes the initial voltage tolerance but also minimizes the temperature drift.

Even though no adjustments are needed with the LT1009, a third terminal allows the reference voltage to be adjusted ±5% to calibrate out system errors. In many applications, the LT1009 can be used as a pin-to-pin replacement of the LM136 and the external trim network eliminated.

For a lower drift 2.5V reference, see the LT1019 data sheet.


CAD Symbols and Footprints: The downloadable Zip file below contains the schematic symbol and PCB footprints.

For complete and up to date package information and drawings, please refer to our packaging page

Part Number Package Code Temp Package
LT1009CMS8#PBF MS-8 MS8 C 05-08-1660 Yes
LT1009CMS8#TRPBF MS-8 MS8 C 05-08-1660 Yes
LT1009CZ#PBF TO-92 Z C 05-08-1410 Yes
LT1009CZ#TRPBF TO-92 Z C 05-08-1410 Yes
LT1009IS8#PBF SO-8 S8 I 05-08-1610 (S8) Yes
LT1009IS8#TRPBF SO-8 S8 I 05-08-1610 (S8) Yes
LT1009IZ#PBF TO-92 Z I 05-08-1410 Yes
LT1009IZ#TRPBF TO-92 Z I 05-08-1410 Yes
LT1009MH TO-46 H M 05-08-1340 No
LT1009S8#PBF SO-8 S8 C 05-08-1610 (S8) Yes
LT1009S8#TRPBF SO-8 S8 C 05-08-1610 (S8) Yes

LT1009 Package Drawing
LT1009 Package Drawing
LT1009 Package Drawing

Order Info

  • Part numbers ending in PBF are lead free. Solder plated terminal finish (SnPb) versions are non-standard and special terms and conditions and pricing applies if available. Please contact LTC marketing for information.
  • 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

Part Number Package Temp Price
LT1009CMS8#PBF MS-8 C $2.25 $1.85 Yes
LT1009CMS8#TRPBF MS-8 C $1.91 Yes
LT1009CZ#PBF TO-92 C $1.58 $1.30 Yes
LT1009CZ#TRPBF TO-92 C $1.36 Yes
LT1009IS8#PBF SO-8 I $3.00 $2.45 Yes
LT1009IS8#TRPBF SO-8 I $2.51 Yes
LT1009IZ#PBF TO-92 I $2.75 $2.25 Yes
LT1009IZ#TRPBF TO-92 I $2.31 Yes
LT1009MH TO-46 M $22.00 No
LT1009S8#PBF SO-8 C $2.08 $1.75 Yes
LT1009S8#TRPBF SO-8 C $1.81 Yes
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* The USA list pricing shown is for BUDGETARY USE ONLY, shown in United States dollars (FOB USA per unit for the stated volume), and is subject to change. International prices may differ due to local duties, taxes, fees and exchange rates. For volume-specific price or delivery quotes, please contact your local Linear Technology sales office or authorized distributor.

Demo Boards

Linear 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.

Click here to view our complete list of demo boards


  • Reference for 5V Systems
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  • Digital Voltmeters
  • Current Loop Measurement and Control Systems
  • Power Supply Monitor

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