LT4220
RECOMMENDED FOR NEW DESIGNSDual Supply Hot Swap Controller
- Part Models
- 4
- 1ku List Price
- Starting From $5.83
Overview
- 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
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.
Applications
- Live Board Insertion
- RAID Systems
- –5.2V ECL Supplies
- Industrial Controls
- Split Supply Systems
Documentation
Data Sheet 1
User Guide 1
Technical Articles 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 |
|---|---|---|---|
| LT4220CGN#PBF | 16-Lead SSOP (Narrow 0.15 Inch) | ||
| LT4220CGN#TRPBF | 16-Lead SSOP (Narrow 0.15 Inch) | ||
| LT4220IGN#PBF | 16-Lead SSOP (Narrow 0.15 Inch) | ||
| LT4220IGN#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 |
||
| LT4220CGN#PBF | PRODUCTION | |
| LT4220CGN#TRPBF | PRODUCTION | |
| LT4220IGN#PBF | PRODUCTION | |
| LT4220IGN#TRPBF | PRODUCTION | |
|
Oct 11, 2022 - 22_0235 Epoxy Change from Henkel 8290 to 8290A for GN Package |
||
| LT4220CGN#PBF | PRODUCTION | |
| LT4220CGN#TRPBF | PRODUCTION | |
| LT4220IGN#PBF | PRODUCTION | |
| LT4220IGN#TRPBF | PRODUCTION | |
|
Apr 6, 2022 - 22_0066 Laser Top Mark for 16QSOP Assembled in ADPG [PNG] |
||
| LT4220CGN#PBF | PRODUCTION | |
| LT4220CGN#TRPBF | PRODUCTION | |
| LT4220IGN#PBF | PRODUCTION | |
| LT4220IGN#TRPBF | PRODUCTION | |
This is the most up-to-date revision of the Data Sheet.
Software Resources
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Request a Driver/SoftwareHardware Ecosystem
Tools & Simulations
LTspice
Models for the following parts are available in LTspice:
- LT4220
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
LT4220EGN | + / - 12V, 2A Hot Swap Controller with External FETs, VIN = + / - 12V, VOUT = +12V/2a, -12V/2a