LT4220 - Dual Supply Hot Swap Controller
Features
- Hot Swap™ Controller for Positive and Negative Supplies
- Supply Tracking Mode
- ±2.7V to ±16.5V Operation
- Analog Current Limit with Foldback
- Allows Safe Board Insertion and Removal from a Live Backplane
- Open-Collector Power Good Comparators
- Automatic Retry or Latchoff After a Current Fault
- Dual Undervoltage Lockout Comparator Inputs
- Current Fault Indication
AEC-Q100 data available for specific packages
Typical Application
Description
The LT4220 16-pin dual voltage Hot Swap controller allows a board to be safely inserted and removed from a live backplane. The device operates with any combination of 2.7V to 16.5V and –2.7V to –16.5V supplies. Using two external N-channel pass transistors, the board supply voltages can be ramped up at an adjustable rate. A selectable tracking mode allows dual supply tracking control for ramping the positive and negative supplies together.
The LT4220 features foldback current limit and latches off both gates if either supply remains in current limit longer than an adjustable time amount. The IC can be configured for automatic restart after a delay set by the same timer.
A power good signal indicates when the output voltages monitored by the two FB comparators are within tolerance, and the gate drive signals are at their full on voltage.
The LT4220 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 |
|---|---|---|---|---|---|
| LT4220CGN#PBF | SSOP-16 | GN | C | 05-08-1641 (GN16) | Yes |
| LT4220CGN#TRPBF | SSOP-16 | GN | C | 05-08-1641 (GN16) | Yes |
| LT4220IGN#PBF | SSOP-16 | GN | I | 05-08-1641 (GN16) | Yes |
| LT4220IGN#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 | |
|---|---|---|---|---|---|---|
| LT4220CGN#PBF | SSOP-16 | C | $5.00 | $3.50 | Yes | |
| LT4220CGN#TRPBF | SSOP-16 | C | $3.56 | Yes | ||
| LT4220IGN#PBF | SSOP-16 | I | $4.90 | $4.00 | Yes | |
| LT4220IGN#TRPBF | SSOP-16 | I | $4.06 | 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 |
|---|---|---|---|
| DC665A | LT4220EGN | + / - 12V, 2A Hot Swap Controller with External FETs, Vin = + / - 12V, Vout = +12V/2a, -12V/2a | $75.00 | |
| Buy Now | |||
Designed for Automotive and Transportation Applications
AEC-Q100 data is available for these specific part numbers. Please contact your local sales representative for more information regarding reliability reports or to inquire about parts that are not included. For more information, view our Automotive and Transportation page
| Part Number | Package | Temp | Price (1-99) |
Price (1k)* |
RoHS | |
|---|---|---|---|---|---|---|
| LT4220IGN#PBF | SSOP-16 | I | $4.90 | $4.00 | Yes | |
| LT4220IGN#TRPBF | SSOP-16 | I | $4.06 | Yes | ||
| Buy Now • Request Samples | ||||||
Applications
- Live Board Insertion
- RAID Systems
- –5.2V ECL Supplies
- Industrial Controls
- Split Supply Systems
People Who Viewed This Product Also Viewed
- LTC4364 - Surge Stopper with Ideal Diode
- LTC4365 - Overvoltage, Undervoltage and Reverse Supply Protection Controller
- LT4363 - High Voltage Surge Stopper with Current Limit
- LT4356-1 and LT4356-2 - Surge Stopper
- LT3080 - Adjustable 1.1A Single Resistor Low Dropout Regulator
- LTC4412 - Low Loss PowerPath Controller in ThinSOT
- LT4320/LT4320-1 - Ideal Diode Bridge Controller
- LT1763 - 500mA, Low Noise, LDO Micropower Regulators
- LT1761 - 100mA, Low Noise, LDO Micropower Regulators in TSOT-23
- LTC4366 - High Voltage Surge Stopper
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
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:
LT4220
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.
