LTC4241 - PCI-Bus with 3.3V Auxiliary Hot Swap Controller
Features
- Allows Safe Board Insertion and Removal from a Live PCI Slot
- Controls 3.3V, 5V, –12V, 12V and 3.3V Auxiliary Supplies
- Independent 3.3V Auxiliary Supply Hot Swap™ Controller
- Adjustable Foldback Current Limit with Circuit Breaker
- Adjustable Supply Voltage Power-Up Rate
- High Side Drive for External N-Channel FETs
- –12V and 12V On-Chip Switches
- Fault and Power Good Outputs
Typical Application
Description
The LTC®4241 is a Hot Swap controller that allows a board to be safely inserted and removed from a live PCI-bus slot. It has a primary controller that controls the four PCI supplies and an independent auxiliary controller to controlthe 3.3V auxiliary supply. External N-channel transistors are used to control the 3.3V, 5V and 3.3V auxiliary supplies while on-chip switches control the –12V and 12V supplies. The 3.3V, 5V and 3.3V auxiliary supplies can be ramped upat an adjustable rate. Electronic circuit breakers protect all five supplies against overcurrent faults. The foldback current limit feature reduces current spikes and power dissipation when shorts occur. The PWRGD output of the primary controller indicates when all four PCI supplies are within tolerance. The FAULT output indicates an overcurrent condition for any of the five supplies.
The LTC4241 is available in the 20-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 |
|---|---|---|---|---|---|
| LTC4241CGN#PBF | SSOP-20 | GN | C | 05-08-1641 (GN20) | Yes |
| LTC4241CGN#TRPBF | SSOP-20 | GN | C | 05-08-1641 (GN20) | Yes |
| LTC4241IGN#PBF | SSOP-20 | GN | I | 05-08-1641 (GN20) | Yes |
| LTC4241IGN#TRPBF | SSOP-20 | GN | I | 05-08-1641 (GN20) | 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 | |
|---|---|---|---|---|---|---|
| LTC4241CGN#PBF | SSOP-20 | C | $2.15 | $1.75 | Yes | |
| LTC4241CGN#TRPBF | SSOP-20 | C | $1.81 | Yes | ||
| LTC4241IGN#PBF | SSOP-20 | I | $2.55 | $2.05 | Yes | |
| LTC4241IGN#TRPBF | SSOP-20 | I | $2.11 | 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.Click here to view our complete list of demo boards
Applications
- PCI-Based Servers
- Computer Systems
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Design Tools
Linear Technology provides a variety of custom design simulation tools and device models to allow even novice designers to quickly and easily evaluate circuits using high performance switching regulators, amplifiers, data converters, filters and more. Please visit our Design Tools page to view and download:
- LTspice - A powerful SPICE simulator, schematic capture and waveform viewer with enhancements and models for easing the simulation of switching regulators
- LTpowerCAD - A complete power supply selection, synthesis and design tool
- LTpowerPlay - A development environment supporting Linear Technology's Digital Power System Management (PSM) products
- PScope & QuikEval - USB-based product demonstration and data acquisition system for use with our ADCs, DACs, and more
- Linduino - Arduino compatible system for developing and distributing firmware libraries and example code
- LinearLab Tools - A collection of Matlab and Python programs that provide direct access to Linear Technology’s data converter evaluation boards
- And More!
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.
