LTC1647 - Dual Hot Swap Controllers
Features
- Allows Safe Board Insertion and Removal from a Live Backplane
- Programmable Electronic Circuit Breaker
- FAULT Output Indication
- Programmable Supply Voltage Power-Up Rate
- High Side Drive for External MOSFET Switches
- Controls Supply Voltages from 2.7V to 16.5V
- Undervoltage Lockout
Typical Application
Description
The LTC1647-1/LTC1647-2/LTC1647-3 are dual Hot Swap controllers that permit a board to be safely inserted and removed from a live backplane.
Using external N-channel MOSFETs, the board supply voltages can be ramped up at a programmable rate. A high side switch driver controls the MOSFET gates for supply voltages ranging from 2.7V to 16.5V. A programmable electronic circuit breaker protects against overloads and shorts. The ON pins are used to control board power or clear a fault.
The LTC1647-1 is a dual Hot Swap controller with a common VCC pin, separate ON pins and is available in an SO-8 package. The LTC1647-2 is similar to the LTC1647-1 but combines a fault status flag with automatic retry at the ON pins and is also available in the SO-8 package. The LTC1647-3 has individual VCC pins, ON pins and FAULT status pins for each channel and is available in a 16-lead 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 |
|---|---|---|---|---|---|
| LTC1647-1CS8#PBF | SO-8 | S8 | C | 05-08-1610 (S8) | Yes |
| LTC1647-1CS8#TRPBF | SO-8 | S8 | C | 05-08-1610 (S8) | Yes |
| LTC1647-1IS8#PBF | SO-8 | S8 | I | 05-08-1610 (S8) | Yes |
| LTC1647-1IS8#TRPBF | SO-8 | S8 | I | 05-08-1610 (S8) | Yes |
| LTC1647-2CS8#PBF | SO-8 | S8 | C | 05-08-1610 (S8) | Yes |
| LTC1647-2CS8#TRPBF | SO-8 | S8 | C | 05-08-1610 (S8) | Yes |
| LTC1647-2IS8#PBF | SO-8 | S8 | I | 05-08-1610 (S8) | Yes |
| LTC1647-2IS8#TRPBF | SO-8 | S8 | I | 05-08-1610 (S8) | Yes |
| LTC1647-3CGN#PBF | SSOP-16 | GN | C | 05-08-1641 (GN16) | Yes |
| LTC1647-3CGN#TRPBF | SSOP-16 | GN | C | 05-08-1641 (GN16) | Yes |
| LTC1647-3IGN#PBF | SSOP-16 | GN | I | 05-08-1641 (GN16) | Yes |
| LTC1647-3IGN#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 | |
|---|---|---|---|---|---|---|
| LTC1647-1CS8#PBF | SO-8 | C | $3.50 | $2.95 | Yes | |
| LTC1647-1CS8#TRPBF | SO-8 | C | $3.00 | Yes | ||
| LTC1647-1IS8#PBF | SO-8 | I | $4.00 | $3.40 | Yes | |
| LTC1647-1IS8#TRPBF | SO-8 | I | $3.45 | Yes | ||
| LTC1647-2CS8#PBF | SO-8 | C | $3.50 | $2.95 | Yes | |
| LTC1647-2CS8#TRPBF | SO-8 | C | $3.00 | Yes | ||
| LTC1647-2IS8#PBF | SO-8 | I | $4.00 | $3.40 | Yes | |
| LTC1647-2IS8#TRPBF | SO-8 | I | $3.45 | Yes | ||
| LTC1647-3CGN#PBF | SSOP-16 | C | $3.80 | $3.20 | Yes | |
| LTC1647-3CGN#TRPBF | SSOP-16 | C | $3.26 | Yes | ||
| LTC1647-3IGN#PBF | SSOP-16 | I | $4.35 | $3.70 | Yes | |
| LTC1647-3IGN#TRPBF | SSOP-16 | I | $3.76 | 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 |
|---|---|---|---|
| DC1358A | LTC1647-1 Dual Hot Swap Controller, 5V/5A Eval System | $50.00 | |
| Buy Now | |||
Applications
- Hot Board Insertion
- Electronic Circuit Breaker
- Portable Computer Device Bays
- Hot Plug Disk Drive
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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:
LTC1647-1
LTC1647-2
LTC1647-3
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.
