LTC7860
RECOMMENDED FOR NEW DESIGNSHigh Efficiency Switching Surge Stopper
- Part Models
- 8
- 1ku List Price
- Starting From $4.48
Overview
- High Efficiency VOUT Clamp Stops High Voltage Input Surges
- SWITCH-ON Mode 100% Duty Cycle for Normal Operation
- PROTECTIVE PWM Mode for Transients and Faults
- VIN Pin to SGND Range: 3.5V to 60V
- External Input Voltage is Extendable to 200V+
- Adjustable Output Voltage Clamp
- Adjustable Output Overcurrent Protection
- Power Inductor Improves Input EMI in Normal Operation
- Programmable Fault Timer
- Adjustable Soft-Start for Input Inrush Current Limiting
- 4.5% Retry Duty Cycle During Faults
- Adjustable Switching Frequency: 50kHz to 850kHz
- Optional Reverse Input Voltage Protection
- Available in Thermally Enhanced 12-lead MSOP Package
The LTC7860 high efficiency surge stopper protects loads from high voltage transients. High efficiency permits higher currents and smaller solution sizes. During an input overvoltage event, such as a load dump in vehicles, the LTC7860 controls the gate of an external MOSFET to act as a switching DC/DC regulator (PROTECTIVE PWM mode). This operation regulates the output voltage to a safe level, allowing the loads to operate through the input over-voltage event. During normal operation (SWITCH-ON mode), the LTC7860 turns on the external MOSFET continuously, passing the input voltage through to the output. An internal comparator limits the voltage across the current sense resistor and regulates the maximum output current to protect against overcurrent faults.
An adjustable timer limits the time that the LTC7860 can spend in overvoltage or overcurrent regulation. When the timer expires, the external MOSFET is turned off until the LTC7860 restarts after a cool down period. By strictly limiting the time in PROTECTIVE PWM Mode when the power loss is high, the components and thermal design can be optimized for normal operation and safely operate through high voltage input surges and/or overcurrent faults. An additional PMOS can be added for reverse battery protection.
Applications
- Industrial and Automotive Power
- Telecom Power
- Vehicle Power Including ISO7637
- Military Power Including MIL1275
Documentation
Data Sheet 1
User Guide 2
Technical Articles 1
Video 2
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 |
|---|---|---|---|
| LTC7860EMSE#PBF | 12-Lead MSOP w/ EP | ||
| LTC7860EMSE#TRPBF | 12-Lead MSOP w/ EP | ||
| LTC7860HMSE#PBF | 12-Lead MSOP w/ EP | ||
| LTC7860HMSE#TRPBF | 12-Lead MSOP w/ EP | ||
| LTC7860IMSE#PBF | 12-Lead MSOP w/ EP | ||
| LTC7860IMSE#TRPBF | 12-Lead MSOP w/ EP | ||
| LTC7860MPMSE#PBF | 12-Lead MSOP w/ EP | ||
| LTC7860MPMSE#TRPBF | 12-Lead MSOP w/ EP |
| Part Models | Product Lifecycle | PCN |
|---|---|---|
|
Jun 5, 2024 - 24_0003 Epoxy Change from Henkel 8290 to 8290A for MSOP Package (2) |
||
| LTC7860EMSE#PBF | PRODUCTION | |
| LTC7860EMSE#TRPBF | PRODUCTION | |
| LTC7860HMSE#PBF | PRODUCTION | |
| LTC7860HMSE#TRPBF | PRODUCTION | |
| LTC7860IMSE#PBF | PRODUCTION | |
| LTC7860IMSE#TRPBF | PRODUCTION | |
| LTC7860MPMSE#PBF | PRODUCTION | |
| LTC7860MPMSE#TRPBF | PRODUCTION | |
|
Feb 4, 2020 - 20_0129 Laser Mark Conversion for 12-Lead MSOP Packages Assembled in ADPG and UTAC |
||
| LTC7860EMSE#PBF | PRODUCTION | |
| LTC7860EMSE#TRPBF | PRODUCTION | |
| LTC7860HMSE#PBF | PRODUCTION | |
| LTC7860HMSE#TRPBF | PRODUCTION | |
| LTC7860IMSE#PBF | PRODUCTION | |
| LTC7860IMSE#TRPBF | PRODUCTION | |
| LTC7860MPMSE#PBF | PRODUCTION | |
| LTC7860MPMSE#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
| Parts | Product Life Cycle | Description |
|---|---|---|
| Hot Swap Controllers 1 | ||
| LT4363 | RECOMMENDED FOR NEW DESIGNS | High Voltage Surge Stopper with Current Limit |
Tools & Simulations
LTspice 2
- LTC7860 Demo Circuit - High Voltage, High Efficiency Switching Surge Stopper with Timer (7-100V to 34Vmax @ 10A)
- LTC7860 Demo Circuit - High Voltage Surge Suppressor with Timer (3.5-60V to 3.5-17V @ 5A)
Models for the following parts are available in LTspice:
- LTC7860
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.