LTC4362-1
LTC4362-2
RECOMMENDED FOR NEW DESIGNS
1.2A Overvoltage/Overcurrent Protector
- Part Models
- 8
- 1ku List Price
- Starting From $2.47
Overview
- 2.5V to 5.5V Operation
- Overvoltage Protection Up to 28V
- Internal 40mΩ N-Channel MOSFET and 31mΩ RSENSE
- Avalanche Rated MOSFET Requires No Input Capacitor or TVS for Most Applications
- <1μs Overvoltage Turn-Off, Gentle Shutdown
- 2% Accurate 5.8V Overvoltage Threshold
- 20% Accurate 1.5A Overcurrent Threshold
- Input Withstands Up to ±25kV HBM ESD with 1μF COUT
- Controlled Power-Up dV/dt Limits Inrush Current
- Reverse Voltage Protection Driver
- Low Current Shutdown
- Latchoff (LTC4362-1) or Auto-Retry (LTC4362-2) After Overcurrent
- Available in 8-Lead DFN 2mm × 3mm Package
The LTC4362 monolithic overvoltage/overcurrent protector safeguards 2.5V to 5.5V systems from power supply overvoltage. It is designed for portable devices with multiple power supply options including wall adaptors, car battery adaptors and USB ports.
The LTC4362 controls an internal 40mΩ N-channel MOSFET in series with the input power supply. During overvoltage transients, the LTC4362 turns off the MOSFET within 1μs, isolating downstream components from the input supply. In most applications, the LTC4362 rides through inductive cable transients without requiring transient voltage suppressors or other external components. An internal current sense resistor is used to implement overcurrent protection.
The LTC4362 has a delayed start-up at plug-in and controlled dV/dt ramp-up for inrush current limiting. A PWRGD pin provides power good monitoring for VIN. The LTC4362 features a soft-shutdown controlled by the ON pin and drives an optional external P-channel MOSFET for negative voltage protection. Following an overvoltage condition, the LTC4362 automatically restarts with a 130ms delay. After an overcurrent fault, the LTC4362-1 remains off while the LTC4362-2 automatically restarts after a 130ms delay.
Applications
- USB Protection
- Handheld Computers
- Cell/Smart Phones
- MP3/MP4 Players
- Digital Cameras
Documentation
Data Sheet 1
User Guide 1
Technical Articles 1
Video 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 |
|---|---|---|---|
| LTC4362CDCB-1#TRMPBF | 8-Lead DFN (2mm x 3mm w/ EP) | ||
| LTC4362CDCB-1#TRPBF | 8-Lead DFN (2mm x 3mm w/ EP) | ||
| LTC4362CDCB-2#TRMPBF | 8-Lead DFN (2mm x 3mm w/ EP) | ||
| LTC4362CDCB-2#TRPBF | 8-Lead DFN (2mm x 3mm w/ EP) | ||
| LTC4362IDCB-1#TRMPBF | 8-Lead DFN (2mm x 3mm w/ EP) | ||
| LTC4362IDCB-1#TRPBF | 8-Lead DFN (2mm x 3mm w/ EP) | ||
| LTC4362IDCB-2#TRMPBF | 8-Lead DFN (2mm x 3mm w/ EP) | ||
| LTC4362IDCB-2#TRPBF | 8-Lead DFN (2mm x 3mm w/ EP) |
This is the most up-to-date revision of the Data Sheet.
Software Resources
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Request a Driver/SoftwareHardware Ecosystem
| Parts | Product Life Cycle | Description |
|---|---|---|
| LT4363 | RECOMMENDED FOR NEW DESIGNS | High Voltage Surge Stopper with Current Limit |
|
LTC4361-1 LTC4361-2 |
RECOMMENDED FOR NEW DESIGNS | Overvoltage/Overcurrent Protection Controller |
Tools & Simulations
LTspice
Models for the following parts are available in LTspice:
- LTC4362-1
- LTC4362-2
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
LTC4362CDCB-2 Demo Board | Monolithic Overvoltage and Overcurrent Protector with Auto-Retry