LTC2920 - Single/Dual Power Supply Margining Controller


  • Margin Voltage Precision <0.4%
  • 400:1 Current Programming Range
  • Symmetric/Asymmetric High and Low Voltage Margining
  • Single Control Pin per Supply-High, Float, Low
  • Single Current Setting Resistor per Supply
  • Wide VCC Compliance 2.3V < VCC < 6V
  • Wide Output Compliance 0.6V < VMARGIN < (VCC - 0.6V)
  • Single in 5-Pin ThinSOTTM (LTC2920-1)
  • Dual in 8-Pin MSOP (LTC2920-2)

Typical Application

LTC2920 Typical Application
LTC2920 Typical Application


The LTC2920 allows power supplies and power supply module output voltages to be precisely adjusted both up and down for automated PCB testing. The power supply output voltage is changed by sourcing or sinking current into the feedback node or voltage adjust pin of the power supply. This allows a system to test the correct operation of electrical components at the upper and/or lower power supply voltage limits specified for a given design (Power Supply "Margining").

The LTC2920 uses a single resistor to set the voltage margining current. The margining current is adjustable over a 400:1 range. Precision margin currents can be supplied to within 0.6V of ground or VCC.

The LTC2920-1 is a single margining controller. The LTC2920-2 has two independently controllable margining channels. Each channel has its own control pin and current setting resistor. The LTC2920-2 can be used to symmetrically margin two power supplies, or asymmetrically margin a single power supply.

Both the LTC2920-1 and LTC2920-2 feature a trimmed onboard voltage reference. Typical power supply margining accuracy is better than 0.4%.


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
LTC2920-1CS5#PBF SOT-23 S5 C 05-08-1635 Yes
LTC2920-1CS5#TRMPBF SOT-23 S5 C 05-08-1635 Yes
LTC2920-1CS5#TRPBF SOT-23 S5 C 05-08-1635 Yes
LTC2920-1IS5#PBF SOT-23 S5 I 05-08-1635 Yes
LTC2920-1IS5#TRMPBF SOT-23 S5 I 05-08-1635 Yes
LTC2920-1IS5#TRPBF SOT-23 S5 I 05-08-1635 Yes
LTC2920-2CMS8#PBF MS-8 MS8 C 05-08-1660 Yes
LTC2920-2CMS8#TRPBF MS-8 MS8 C 05-08-1660 Yes
LTC2920-2IMS8#PBF MS-8 MS8 I 05-08-1660 Yes
LTC2920-2IMS8#TRPBF MS-8 MS8 I 05-08-1660 Yes

LTC2920 Package Drawing
LTC2920 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
LTC2920-1CS5#PBF SOT-23 C $1.51 Yes
LTC2920-1CS5#TRMPBF SOT-23 C $1.51 $1.33 Yes
LTC2920-1CS5#TRPBF SOT-23 C $1.51 $1.31 Yes
LTC2920-1IS5#PBF SOT-23 I $1.71 Yes
LTC2920-1IS5#TRMPBF SOT-23 I $1.71 $1.53 Yes
LTC2920-1IS5#TRPBF SOT-23 I $1.71 $1.51 Yes
LTC2920-2CMS8#PBF MS-8 C $2.05 $1.75 Yes
LTC2920-2CMS8#TRPBF MS-8 C $1.81 Yes
LTC2920-2IMS8#PBF MS-8 I $2.35 $2.00 Yes
LTC2920-2IMS8#TRPBF MS-8 I $2.06 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.

Part Number Description Price Documentation
DC543A LTC2920-2CMS8 LTC1628CG | LTC2920 with Dual DC to DC Converter, 7V to 24V Input, 5V @ 12A max = Vout1, 3.3V @ 12A max = Vout2 $100.00
DC563A LTC2920 Single (-1) & Dual (-2) Margining Controller $50.00
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  • Automated PCB Production Testing
  • Automated Preventative Maintenance Testing
  • DC/DC Converter Module Margining

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