LTC1646 - CompactPCI Dual Hot Swap Controller
Features
- Allows Safe Board Insertion and Removal from a Live, CompactPCI™ Bus
- Controls 3.3V and/or 5V Supplies
- Programmable Foldback Current Limit During Power-Up
- Dual Level Circuit Breakers Protect Supplies from Overcurrent and Short-Circuit Faults
- Local_PCI_RST# Logic On-Chip
- PRECHARGE Output Biases I/O Pins During Card Insertion and Extraction
- User Programmable Supply Voltage Power-Up Rate
- 15V High Side Drive for External N-Channels
- PWRGD, RESETOUT and FAULT Outputs
Typical Application
Description
The LTC1646 is a hot swap controller that allows a board to be safely inserted and removed from a live CompactPCI bus slot. Two external N-Channel transistors control the 3.3V and 5V supplies. The supplies can be ramped-up in current limit or at a programmable rate. Electronic circuit breakers protect both supplies against overcurrent fault conditions. The PWRGD output indicates when all of the supply voltages are within tolerance. The OFF/ON pin is used to cycle the board power or reset the circuit breaker. The PRECHARGE output can be used to bias the bus I/O pins during card insertion and extraction. PCI_RST# is logically combined on-chip with HEALTHY# in order to generate LOCAL_PCI_RST# which can be used to reset the CPCI card logic if either of the supply voltages is not within tolerance.The LTC1646 is available in the 16-pin narrow SSOP package.
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 |
|---|---|---|---|---|---|
| LTC1646CGN#PBF | SSOP-16 | GN | C | 05-08-1641 (GN16) | Yes |
| LTC1646CGN#TRPBF | SSOP-16 | GN | C | 05-08-1641 (GN16) | Yes |
| LTC1646IGN#PBF | SSOP-16 | GN | I | 05-08-1641 (GN16) | Yes |
| LTC1646IGN#TRPBF | SSOP-16 | GN | I | 05-08-1641 (GN16) | 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 | |
|---|---|---|---|---|---|---|
| LTC1646CGN#PBF | SSOP-16 | C | $4.65 | $3.40 | Yes | |
| LTC1646CGN#TRPBF | SSOP-16 | C | $3.46 | Yes | ||
| LTC1646IGN#PBF | SSOP-16 | I | $5.35 | $3.90 | Yes | |
| LTC1646IGN#TRPBF | SSOP-16 | I | $3.96 | 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 |
|---|---|---|---|
| DC369A | LTC1646CGN | Compact PCI-Bus Dual Hot-Swap Controller, 3.3V and 5V Inputs, 3.3Vout @ 7.6A, 5Vout @ 5A | $50.00 | |
| Buy Now | |||
Applications
- CompactPCI Bus Removable Boards
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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:
LTC1646
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.
