LTC4280
RECOMMENDED FOR NEW DESIGNSHot Swap Controller with I2C Compatible Monitoring
- Part Models
- 4
- 1ku List Price
- Starting From $5.98
Overview
- Allows Safe Insertion into Live Backplane
- 8-Bit ADC Monitors Current and Voltage
- I2C/SMBus Interface
- Wide Operating Voltage Range: 2.9V to 15V
- Adjustable Overcurrent Filter Time
- High Side Drive for External N-Channel MOSFET
- No External Gate Capacitor Required
- Input Overvoltage/Undervoltage Protection
- Optional Latchoff or Auto-Retry After Faults
- Alerts Host After Faults
- Inrush Current Limit with Foldback
- Available in 24-Pin 4mm × 5mm QFN Package
The LTC4280 Hot Swap™ controller allows a board to be safely inserted and removed from a live backplane. Using an external N-channel pass transistor, board supply voltage and inrush current are ramped up at an adjustable rate. An I2C interface and onboard ADC allow for monitoring of load current, voltage and fault status.
The device features adjustable analog foldback current limit and a FILTER pin which configures the time spent in overcurrent before declaring a fault. An I2C interface may configure the part to latch off or automatically restart after the LTC4280 detects a current limit fault.
The controller has additional features to interrupt the host when a fault has occurred, notify when output power is good, detect insertion of a load card, and power-up either automatically upon insertion or wait for an I2C command to turn on.
Applications
- Live Board Insertion
- Electronic Circuit Breakers
- Computers, Servers
- Platform Management
Documentation
Data Sheet 1
User Guide 1
Product Selector Card 2
ADI has always placed the highest emphasis on delivering products that meet the maximum levels of quality and reliability. We achieve this by incorporating quality and reliability checks in every scope of product and process design, and in the manufacturing process as well. "Zero defects" for shipped products is always our goal. View our quality and reliability program and certifications for more information.
| Part Model | Pin/Package Drawing | Documentation | CAD Symbols, Footprints, and 3D Models |
|---|---|---|---|
| LTC4280CUFD#PBF | 24-Lead QFN (4mm x 5mm x 0.75mm w/ EP) | ||
| LTC4280CUFD#TRPBF | 24-Lead QFN (4mm x 5mm x 0.75mm w/ EP) | ||
| LTC4280IUFD#PBF | 24-Lead QFN (4mm x 5mm x 0.75mm w/ EP) | ||
| LTC4280IUFD#TRPBF | 24-Lead QFN (4mm x 5mm x 0.75mm w/ EP) |
This is the most up-to-date revision of the Data Sheet.
Software Resources
Can't find the software or driver you need?
Request a Driver/SoftwareHardware Ecosystem
| Parts | Product Life Cycle | Description |
|---|---|---|
|
LTC4215 LTC4215-2 |
RECOMMENDED FOR NEW DESIGNS | Hot Swap Controller with I2C Compatible Monitoring |
| LTC4281 | RECOMMENDED FOR NEW DESIGNS | Hot Swap Controller with I2C Compatible Monitoring |
Tools & Simulations
LTspice
Models for the following parts are available in LTspice:
- LTC4280
Linduino 3
LTpowerPlay®
LTpowerPlay® is a powerful, Windows-based development environment supporting Linear Technology's Digital Power System Management (PSM) products.
Open ToolLTspice® is a powerful, fast and free simulation software, schematic capture and waveform viewer with enhancements and models for improving the simulation of analog circuits.
Linduino is Analog Devices’ Arduino compatible system for developing and distributing firmware libraries and example code for our integrated circuits. Each Linduino-supported product includes an example main program, defined in the LTSketchbook/Part Number folder and driver code, defined in the LTSketchbook/libraries folder.
Linduino code repository on GitHub and instructions on how to use the code.
Evaluation Kits
LTC4280 | Hot Swap Controller with ADC and I2C, 3 GPIOs (Requires DC590)