LTC4230 - Triple Hot Swap Controller with Multifunction Current Control
Features
- Allows Safe Board Insertion and Removal from a Live Backplane
- Controls Three Supply Voltages from 1.7V to 16.5V with VCC1 >or= VCC2 >or= VCC3
- Programmable Soft-Start with Inrush Current Limiting, No External Gate Capacitor Required
- Faster Turn-Off Time with No Gate Capacitor
- Dual Level Overcurrent Fault Protection
- Programmable Overcurrent Response Time
- Programmable Overvoltage Protection
- Automatic Retry or Latched Mode Operation
- Independent N-Channel FET High Side Drivers
- User-Programmable Supply Voltage Power-Up Rate
- FBn Pin Monitors VOUTn and Signals RESETn
- Glitch Filter Eliminates Spurious RESETn Signals
Typical Application
Description
The LTC®4230 is a 3-channel Hot Swap™ controller that allows a board to be safely inserted and removed from a live backplane. Internal high side switch drivers control the gates of external N-channel MOSFETs for supply voltages ranging from 1.7V to 16.5V. The LTC4230 provides soft-start and inrush current limiting during the programmable start-up period.
On-chip current limit comparators provide dual level circuit breaker protection. The slow comparators trip at VCCn–50mV and activate in 10µs or are programmed by an external filter capacitor. The fast comparators trip at VCCn–150mV and typically respond in 500ns.
Each FBnpin monitors its own output supply voltage and signals its RESET pin. The ON pin turns the chip on and off and can be used for a reset function. The LTC4230 also provides additional functions including fault indication, autoretry or latchoff modes, programmable current limit response time based on the FAULT and FILTER pins’ functionality.
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 |
|---|---|---|---|---|---|
| LTC4230CGN#PBF | SSOP-20 | GN | C | 05-08-1641 (GN20) | Yes |
| LTC4230CGN#TRPBF | SSOP-20 | GN | C | 05-08-1641 (GN20) | Yes |
| LTC4230IGN#PBF | SSOP-20 | GN | I | 05-08-1641 (GN20) | Yes |
| LTC4230IGN#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 | |
|---|---|---|---|---|---|---|
| LTC4230CGN#PBF | SSOP-20 | C | $4.55 | $3.65 | Yes | |
| LTC4230CGN#TRPBF | SSOP-20 | C | $3.75 | Yes | ||
| LTC4230IGN#PBF | SSOP-20 | I | $5.30 | $4.25 | Yes | |
| LTC4230IGN#TRPBF | SSOP-20 | I | $4.35 | 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 |
|---|---|---|---|
| DC537A | LTC4230 triple hot swap cont. demo bd | $75.00 | |
| Buy Now | |||
Applications
- Electronic Circuit Breaker
- Hot Board Insertion and Removal (Either On Backplane or On Removable Card)
- Industrial High Side Switch/Circuit Breaker
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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:
LTC4230
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.
