LTC2920 - Single/Dual Power Supply Margining Controller
Features
- 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)
AEC-Q100 data available for specific packages
Typical Application
Description
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%.
Packaging
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 Drawing |
RoHS |
|---|---|---|---|---|---|
| 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 |
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 (1-99) |
Price (1k)* |
RoHS | |
|---|---|---|---|---|---|---|
| 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 | ||
| Buy Now • Request Samples | ||||||
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 | |
| Buy Now | |||
Designed for Automotive and Transportation Applications
AEC-Q100 data is available for these specific part numbers. Please contact your local sales representative for more information regarding reliability reports or to inquire about parts that are not included. For more information, view our Automotive and Transportation page
| Part Number | Package | Temp | Price (1-99) |
Price (1k)* |
RoHS | |
|---|---|---|---|---|---|---|
| LTC2920-2IMS8#PBF | MS-8 | I | $2.35 | $2.00 | Yes | |
| LTC2920-2IMS8#TRPBF | MS-8 | I | $2.06 | Yes | ||
| Buy Now • Request Samples | ||||||
Applications
- Automated PCB Production Testing
- Automated Preventative Maintenance Testing
- DC/DC Converter Module Margining
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Design Tools
LTspice
LTspice® software is a powerful, fast and free simulation tool, schematic capture and waveform viewer with enhancements and models for improving the simulation of switching regulators. Click here to download LTspice
Models for the following parts are available in LTspice:
LTC2920-1
LTC2920-2
Technical Support
- For immediate technical assistance, contact your local sales office or distributor or call 1-800-4-LINEAR (US customers only) or 408-432-1900.
- For less urgent requests, please complete our Technical Support Request Form. Please allow 2-3 business days for reply.
