DocumentationDatasheet
Reliability Data
LT Journal
cad_symbol
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)
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%.
SOT-23,MS-8
Package Variations and Pricing
| Part Number | Package | Pins | Temp | Price (1-99) |
Price (1k)* |
|---|---|---|---|---|---|
| LTC2920-1CS5#PBF | SOT | 5 | C | $1.51 | |
| LTC2920-1CS5#TRMPBF | SOT | 5 | C | $1.51 | $1.33 |
| LTC2920-1CS5#TRPBF | SOT | 5 | C | $1.51 | $1.31 |
| LTC2920-1IS5#PBF | SOT | 5 | I | $1.71 | |
| LTC2920-1IS5#TRMPBF | SOT | 5 | I | $1.71 | $1.53 |
| LTC2920-1IS5#TRPBF | SOT | 5 | I | $1.71 | $1.51 |
| LTC2920-2CMS8#PBF | MSOP | 8 | C | $2.05 | $1.75 |
| LTC2920-2CMS8#TRPBF | MSOP | 8 | C | $1.81 | |
| LTC2920-2IMS8#PBF | MSOP | 8 | I | $2.35 | $2.00 |
| LTC2920-2IMS8#TRPBF | MSOP | 8 | I | $2.06 | |
| LTC2920-1CS5 | SOT | 5 | C | $3.02 | |
| LTC2920-1CS5#TR | SOT | 5 | C | $3.02 | $2.62 |
| LTC2920-1IS5 | SOT | 5 | I | $3.42 | |
| LTC2920-1IS5#TR | SOT | 5 | I | $3.42 | $3.02 |
| LTC2920-2CMS8 | MSOP | 8 | C | $4.10 | $3.50 |
| LTC2920-2CMS8#TR | MSOP | 8 | C | $3.62 | |
| LTC2920-2IMS8 | MSOP | 8 | I | $4.70 | $4.00 |
| LTC2920-2IMS8#TR | MSOP | 8 | I | $4.12 | |
| LTC2920-1CS5#TRM | SOT | 5 | C | $3.02 | $2.66 |
| LTC2920-1IS5#TRM | SOT | 5 | I | $3.42 | $3.06 |
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 |