LTC4214 - Negative Voltage Hot Swap Controllers
Features
- Allows Safe Board Insertion and Removal from a Live Backplane
- Controls Supplies from 0V to –16V
- Adjustable Analog Current Limit With Circuit Breaker Timer
- Fast Response Time Limits Peak Fault Current
- Adjustable Soft-Start Current Limit
- Adjustable Timer with Drain Voltage Accelerated Response
- Adjustable Undervoltage/Overvoltage Protection
- LTC4214-1: Latch Off After Fault
- LTC4214-2: Automatic Retry After Fault
- Available in the 10-Pin MSOP Package
Typical Application
Description
The LTC4214 negative voltage Hot Swap controller allows a board to be safely inserted and removed from a live backplane. Output current is controlled by three stages of current limiting: a timed circuit breaker, active current limiting and a fast feedforward path that limits peak current under worst-case catastrophic fault conditions.
Adjustable undervoltage and overvoltage detectors disconnect the load whenever the input supply exceeds the desired operating range. The LTC4214 controls negative supplies ranging from near zero to –16V. A multifunction timer delays initial start-up and controls the circuit breaker’s response time. This response time is accelerated by sensing excessive MOSFET drain voltage, keeping the MOSFET within its safe operating area (SOA). An adjustable soft-start circuit controls MOSFET inrush current at start-up. A power good status output can enable a power module at start-up or disable it if the circuit breaker trips.
The LTC4214-1 latches off after a circuit breaker fault times out. The LTC4214-2 provides automatic retry after a fault. The LTC4214 is available in the 10-pin MSOP 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 |
|---|---|---|---|---|---|
| LTC4214-1CMS#PBF | MS-10 | MS | C | 05-08-1661 | Yes |
| LTC4214-1CMS#TRPBF | MS-10 | MS | C | 05-08-1661 | Yes |
| LTC4214-1IMS#PBF | MS-10 | MS | I | 05-08-1661 | Yes |
| LTC4214-1IMS#TRPBF | MS-10 | MS | I | 05-08-1661 | Yes |
| LTC4214-2CMS#PBF | MS-10 | MS | C | 05-08-1661 | Yes |
| LTC4214-2CMS#TRPBF | MS-10 | MS | C | 05-08-1661 | Yes |
| LTC4214-2IMS#PBF | MS-10 | MS | I | 05-08-1661 | Yes |
| LTC4214-2IMS#TRPBF | MS-10 | MS | I | 05-08-1661 | 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 | |
|---|---|---|---|---|---|---|
| LTC4214-1CMS#PBF | MS-10 | C | $3.30 | $2.35 | Yes | |
| LTC4214-1CMS#TRPBF | MS-10 | C | $2.41 | Yes | ||
| LTC4214-1IMS#PBF | MS-10 | I | $3.75 | $2.65 | Yes | |
| LTC4214-1IMS#TRPBF | MS-10 | I | $2.71 | Yes | ||
| LTC4214-2CMS#PBF | MS-10 | C | $3.30 | $2.35 | Yes | |
| LTC4214-2CMS#TRPBF | MS-10 | C | $2.41 | Yes | ||
| LTC4214-2IMS#PBF | MS-10 | I | $3.75 | $2.65 | Yes | |
| LTC4214-2IMS#TRPBF | MS-10 | I | $2.71 | 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
- Hot Board Insertion
- Electronic Circuit Breaker
- Negative Power Supply Control
- Central Office Switching
- High Availability Servers
- Disk Arrays
- Optical Networking/Switching
- ECL
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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:
LTC4214-1
LTC4214-2
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.
