LTC4221
RECOMMENDED FOR NEW DESIGNSDual Hot Swap Controller/Power Sequencer with Dual Speed, Dual Level Fault Protection
- Part Models
- 4
- 1ku List Price
- Starting From $5.17
Overview
- Allows Safe Board Insertion and Removal from a Live Backplane
- Configurable Power Supply Sequencing
- Soft-Start with Current Foldback Limits Inrush Current
- No External Gate Capacitor Required
- Adjustable Dual Level Circuit Breaker Protection
- Controls Supply Voltages from 1V to 13.5V
- Independent N-Channel MOSFET High Side Drivers
- FB Pin Monitors VOUT for Overvoltage Protection
- Latch Off or Automatic Retry on Current Fault
- FAULT and PWRGD Outputs
- Narrow 16-Pin SSOP Package
The LTC4221 is a 2-channel Hot Swap™ controller that allows a board to be safely inserted and removed from a live backplane. Using two independent high side gate drivers to control two external N-channel pass transistors, the output voltages can be ramped up with current foldback to limit the inrush current during the start-up period. No external compensation capacitors are required at the GATE pins. The two channels can be configured to ramp up and down separately or simultaneously for supply voltages ranging from 2.7V to 13.5V and 1V to 13.5V for channels 1 and 2 respectively.
Each channel has two current limit comparators that provide dual level and dual speed overcurrent circuit breaker protection after the start-up period. If any current sense voltage exceeds 100mV for 1µs or 25mV for the timeout delay (set by the CFILTER at the FILTER pin), then the FAULT latch is set and both GATE pins are pulled low.
The FB pins monitor the respective channel output voltages and provide the inputs for the PWRGD comparators as well as overvoltage protection.
Applications
- Electronic Circuit Breaker
- Power Supply Sequencing
- Live Board Insertion and Removal
- Industrial High Side Switch/Circuit Breaker
Documentation
Data Sheet 1
User Guide 1
Product Selector Card 1
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 |
|---|---|---|---|
| LTC4221CGN#PBF | 16-Lead SSOP (Narrow 0.15 Inch) | ||
| LTC4221CGN#TRPBF | 16-Lead SSOP (Narrow 0.15 Inch) | ||
| LTC4221IGN#PBF | 16-Lead SSOP (Narrow 0.15 Inch) | ||
| LTC4221IGN#TRPBF | 16-Lead SSOP (Narrow 0.15 Inch) |
| Part Models | Product Lifecycle | PCN |
|---|---|---|
|
Oct 3, 2024 - 24_0235 (QSOP/SSOP PKG) Migrating Bottom Trace Code Marking to Top Side Laser Marking |
||
| LTC4221CGN#PBF | PRODUCTION | |
| LTC4221CGN#TRPBF | PRODUCTION | |
| LTC4221IGN#PBF | PRODUCTION | |
| LTC4221IGN#TRPBF | PRODUCTION | |
|
Oct 11, 2022 - 22_0235 Epoxy Change from Henkel 8290 to 8290A for GN Package |
||
| LTC4221CGN#PBF | PRODUCTION | |
| LTC4221CGN#TRPBF | PRODUCTION | |
| LTC4221IGN#PBF | PRODUCTION | |
| LTC4221IGN#TRPBF | PRODUCTION | |
|
Apr 6, 2022 - 22_0066 Laser Top Mark for 16QSOP Assembled in ADPG [PNG] |
||
| LTC4221CGN#PBF | PRODUCTION | |
| LTC4221CGN#TRPBF | PRODUCTION | |
| LTC4221IGN#PBF | PRODUCTION | |
| LTC4221IGN#TRPBF | PRODUCTION | |
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 |
|---|---|---|
| Hot Swap Controllers 1 | ||
| LTC4226 | PRODUCTION | Wide Operating Range Dual Hot Swap Controller |
Tools & Simulations
LTspice
Models for the following parts are available in LTspice:
- LTC4221
LTspice® is a powerful, fast and free simulation software, schematic capture and waveform viewer with enhancements and models for improving the simulation of analog circuits.
Evaluation Kits
LTC4221 Dual Hot Swap Controller