LTC2927 - Single Power Supply Tracking Controller
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
AEC-Q100 data available for specific 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.
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 |
|---|---|---|---|---|---|
| LTC2927CDDB#PBF | 3x2 DFN-8 | DDB | C | 05-08-1702 | Yes |
| LTC2927CDDB#TRMPBF | 3x2 DFN-8 | DDB | C | 05-08-1702 | Yes |
| LTC2927CDDB#TRPBF | 3x2 DFN-8 | DDB | C | 05-08-1702 | Yes |
| LTC2927CTS8#PBF | SOT-23 | TS8 | C | 05-08-1637 | Yes |
| LTC2927CTS8#TRMPBF | SOT-23 | TS8 | C | 05-08-1637 | Yes |
| LTC2927CTS8#TRPBF | SOT-23 | TS8 | C | 05-08-1637 | Yes |
| LTC2927IDDB#PBF | 3x2 DFN-8 | DDB | I | 05-08-1702 | Yes |
| LTC2927IDDB#TRMPBF | 3x2 DFN-8 | DDB | I | 05-08-1702 | Yes |
| LTC2927IDDB#TRPBF | 3x2 DFN-8 | DDB | I | 05-08-1702 | Yes |
| LTC2927ITS8#PBF | SOT-23 | TS8 | I | 05-08-1637 | Yes |
| LTC2927ITS8#TRMPBF | SOT-23 | TS8 | I | 05-08-1637 | Yes |
| LTC2927ITS8#TRPBF | SOT-23 | TS8 | I | 05-08-1637 | 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 | |
|---|---|---|---|---|---|---|
| LTC2927CDDB#PBF | 3x2 DFN-8 | C | $2.30 | Yes | ||
| LTC2927CDDB#TRMPBF | 3x2 DFN-8 | C | $2.30 | $1.63 | Yes | |
| LTC2927CDDB#TRPBF | 3x2 DFN-8 | C | $2.30 | $1.61 | Yes | |
| LTC2927CTS8#PBF | SOT-23 | C | $2.30 | Yes | ||
| LTC2927CTS8#TRMPBF | SOT-23 | C | $2.30 | $1.63 | Yes | |
| LTC2927CTS8#TRPBF | SOT-23 | C | $2.30 | $1.61 | Yes | |
| LTC2927IDDB#PBF | 3x2 DFN-8 | I | $2.73 | Yes | ||
| LTC2927IDDB#TRMPBF | 3x2 DFN-8 | I | $2.73 | $1.93 | Yes | |
| LTC2927IDDB#TRPBF | 3x2 DFN-8 | I | $2.73 | $1.91 | Yes | |
| LTC2927ITS8#PBF | SOT-23 | I | $2.73 | Yes | ||
| LTC2927ITS8#TRMPBF | SOT-23 | I | $2.73 | $1.93 | Yes | |
| LTC2927ITS8#TRPBF | SOT-23 | I | $2.73 | $1.91 | 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 |
|---|---|---|---|
| DC817A | LTC2927 | Single Pwr Supply Tracking 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 | |
|---|---|---|---|---|---|---|
| LTC2927ITS8#PBF | SOT-23 | I | $2.73 | Yes | ||
| LTC2927ITS8#TRMPBF | SOT-23 | I | $2.73 | $1.93 | Yes | |
| LTC2927ITS8#TRPBF | SOT-23 | I | $2.73 | $1.91 | Yes | |
| Buy Now • Request Samples | ||||||
Applications
- VCORE and VI/O Supply Tracking
- Microprocessor, DSP and FPGA Supplies
- Multiple Supply Systems
- Point-of-Load Supplies
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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:
LTC2927
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.
