DocumentationDatasheet
Design Note
Reliability Data
LT Journal
Press Release
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Features
- Flexible Power Supply Tracking
- Tracks Both Up and Down
- Power Supply Sequencing
- Supply Stability is Not Affected
- Low Pin Count
- Controls Single Supply without Series FETs
- Adjustable Ramp Rate
- Available in 8-Lead ThinSOT and 8-Lead (3mm × 2mm) DFN Packages
Typical Application
Description
The LTC2927 provides a simple solution to power supply tracking and sequencing requirements. By selecting a few resistors, the supply can be configured to ramp-up and ramp-down with differing ramp rates, voltage offsets, or time delays relative to other supplies or a master signal.By forcing current into a feedback node of an independent supply, the LTC2927 causes the output to track a ramp signal without inserting any pass element losses. Because the current is controlled in an open-loop manner, the LTC2927 does not affect the transient response or stability of the supply. The compact solution at point of load minimizes the trace length of the DC/DC circuit sensitive FB node. Furthermore, it presents a high impedance when power-up is complete, effectively removing it from the DC/DC circuit.
3x2 DFN-8,SOT-23
Package Variations and Pricing
| Part Number | Package | Pins | Temp | Price (1-99) |
Price (1k)* |
|---|---|---|---|---|---|
| LTC2927CDDB#PBF | DFN | 8 | C | $2.30 | |
| LTC2927CDDB#TRMPBF | DFN | 8 | C | $2.30 | $1.63 |
| LTC2927CDDB#TRPBF | DFN | 8 | C | $2.30 | $1.61 |
| LTC2927CTS8#PBF | SOT | 8 | C | $2.30 | |
| LTC2927CTS8#TRMPBF | SOT | 8 | C | $2.30 | $1.63 |
| LTC2927CTS8#TRPBF | SOT | 8 | C | $2.30 | $1.61 |
| LTC2927IDDB#PBF | DFN | 8 | I | $2.73 | |
| LTC2927IDDB#TRMPBF | DFN | 8 | I | $2.73 | $1.93 |
| LTC2927IDDB#TRPBF | DFN | 8 | I | $2.73 | $1.91 |
| LTC2927ITS8#PBF | SOT | 8 | I | $2.73 | |
| LTC2927ITS8#TRMPBF | SOT | 8 | I | $2.73 | $1.93 |
| LTC2927ITS8#TRPBF | SOT | 8 | I | $2.73 | $1.91 |
| LTC2927CTS8 | SOT | 8 | C | $4.60 | |
| LTC2927CTS8#TR | SOT | 8 | C | $4.60 | $3.22 |
| LTC2927CDDB | DFN | 8 | C | $4.60 | |
| LTC2927CDDB#TR | DFN | 8 | C | $4.60 | $3.22 |
| LTC2927ITS8 | SOT | 8 | I | $5.46 | |
| LTC2927ITS8#TR | SOT | 8 | I | $5.46 | $3.82 |
| LTC2927IDDB | DFN | 8 | I | $5.46 | |
| LTC2927IDDB#TR | DFN | 8 | I | $5.46 | $3.82 |
| LTC2927CDDB#TRM | DFN | 8 | C | $4.60 | $3.26 |
| LTC2927CTS8#TRM | SOT | 8 | C | $4.60 | $3.26 |
| LTC2927IDDB#TRM | DFN | 8 | I | $5.46 | $3.86 |
| LTC2927ITS8#TRM | SOT | 8 | I | $5.46 | $3.86 |
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 |
|---|---|---|---|
| DC817A | LTC2927 | Single Pwr Supply Tracking Controller | $50.00 |