LTC1642A - Hot Swap Controller
Features
- Adjustable Undervoltage and Overvoltage Protection
- Foldback Current Limit
- Adjustable Current Limit Time-Out
- VCC: 2.97V to 16.5V Normal Operation, Protected Against Surges to 33V
- Single Channel NFET Driver
- Latch Off or Automatic Retry on Current Fault
- Driver for SCR Crowbar on Overvoltage
- Adjustable Reset Timer
- Reference Output with Uncommitted Comparator
- 16-Pin SSOP Package
Typical Application
Description
The LTC1642A is a 16-pin Hot Swap controller that allows a board to be safely inserted and removed from a live backplane. Using an external N-Channel pass transistor, the board supply voltage can be ramped up at an adjustable rate. A high side switch driver controls the N-Channel gate for supply voltages ranging from 2.97V to 16.5V.
The SENSE pin allows foldback limiting of the load current, with circuit breaker action after an adjustable delay time. The delay allows the part to power-up in current limit. The CRWBR output can be used to trigger an SCR for crowbar protection of the load if the input supply exceeds an adjustable threshold. The RESET output can generate a system reset with adjustable delay when the supply voltage falls below an adjustable threshold. The ON pin cycles the board power. The LTC1642A is available in the 16-pin SSOP package.
Hot Swap is a trademark of Linear Technology Corporation.
| Notes |
|
| LTC1642 | |
| LTC1642A | Recommended for applications where VCC is higher than 12V |
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 |
|---|---|---|---|---|---|
| LTC1642ACGN#PBF | SSOP-16 | GN | C | 05-08-1641 (GN16) | Yes |
| LTC1642ACGN#TRPBF | SSOP-16 | GN | C | 05-08-1641 (GN16) | Yes |
| LTC1642AIGN#PBF | SSOP-16 | GN | I | 05-08-1641 (GN16) | Yes |
| LTC1642AIGN#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 | |
|---|---|---|---|---|---|---|
| LTC1642ACGN#PBF | SSOP-16 | C | $4.15 | $3.50 | Yes | |
| LTC1642ACGN#TRPBF | SSOP-16 | C | $3.56 | Yes | ||
| LTC1642AIGN#PBF | SSOP-16 | I | $5.00 | $4.20 | Yes | |
| LTC1642AIGN#TRPBF | SSOP-16 | I | $4.26 | 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
- InfiniBandTM Systems
People Who Viewed This Product Also Viewed
- LTC4364 - Surge Stopper with Ideal Diode
- LT4356-1 and LT4356-2 - Surge Stopper
- LT4363 - High Voltage Surge Stopper with Current Limit
- LT4356MP-1 and LT4356MP-2 - Surge Stopper
- LTC4370 - Two-Supply Diode-OR Current Balancing Controller
- LTC4365 - Overvoltage, Undervoltage and Reverse Supply Protection Controller
- LTC1642 - Hot Swap Controller
- LT4320/LT4320-1 - Ideal Diode Bridge Controller
- LTC4217 - 2A Integrated Hot Swap Controller
- LTC4361-1/LTC4361-2 - Overvoltage/Overcurrent Protection Controller
Product Notifications
Please login to your MyLinear account for notifications of datasheet updates, new document releases and LTspice model announcements for your favorite products. If you do not have a MyLinear account you may Sign Up Now.
Forgot your password? Click here.
Need help? Email mylinear@linear.com with questions and comments.
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.
