VideosDocumentationDatasheet
Reliability Data
Product Selector Card
LT Journal
Press Release
cad_symbol
ltspice
Features
- 2.5V to 5.5V Operation
- Overvoltage Protection Up to 80V
- No Input Capacitor or TVS Required for Most Applications
- 2% Accurate 5.8V Overvoltage Threshold
- <1μs Overvoltage Turn-Off, Gentle Shutdown
- Controls N-Channel MOSFET
- Adjustable Power-Up dV/dt Limits Inrush
- Reverse Voltage Protection (LTC4360-2)
- Power Good Output
- Low Current Shutdown (LTC4360-1)
- Available in a Tiny 8-Lead SC70 Package
Typical Application
Description
The LTC4360 overvoltage protection controller 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 LTC4360 controls an external N-channel MOSFET in series with the input power supply. During overvoltage transients, the LTC4360 turns off the MOSFET within 1μs, isolating downstream components from the input supply. Inductive cable transients are absorbed by the MOSFET and load capacitance. In most applications, the LTC4360 provides protection from transients up to 80V without requiring transient voltage suppressors or other external components.
The LTC4360 has a delayed start-up and an adjustable dV/dt ramp-up for inrush current limiting. A PWRGD pin provides power good monitoring for VIN. Following an overvoltage condition, the LTC4360 automatically restarts with a start-up delay. The LTC4360-1 features a soft shutdown controlled by the ON pin, while the LTC4360-2 controls an optional external P-channel MOSFET for negative voltage protection.
SC-70,
Package Variations and Pricing
| Part Number | Package | Pins | Temp | Price (1-99) |
Price (1k)* |
|---|---|---|---|---|---|
| LTC4360CSC8-1#PBF | SC70 | 8 | C | $1.64 | |
| LTC4360CSC8-1#TRMPBF | SC70 | 8 | C | $1.64 | $1.20 |
| LTC4360CSC8-1#TRPBF | SC70 | 8 | C | $1.64 | $1.15 |
| LTC4360CSC8-2#PBF | SC70 | 8 | C | $1.64 | |
| LTC4360CSC8-2#TRMPBF | SC70 | 8 | C | $1.64 | $1.20 |
| LTC4360CSC8-2#TRPBF | SC70 | 8 | C | $1.64 | $1.15 |
| LTC4360ISC8-1#PBF | SC70 | 8 | I | $1.81 | |
| LTC4360ISC8-1#TRMPBF | SC70 | 8 | I | $1.81 | $1.32 |
| LTC4360ISC8-1#TRPBF | SC70 | 8 | I | $1.81 | $1.27 |
| LTC4360ISC8-2#PBF | SC70 | 8 | I | $1.81 | |
| LTC4360ISC8-2#TRMPBF | SC70 | 8 | I | $1.81 | $1.32 |
| LTC4360ISC8-2#TRPBF | SC70 | 8 | I | $1.81 | $1.27 |
Linear Technology offers many demo boards free of charge to qualified customers. Contact your local sales office or distributor to inquire about a demo board. Certain demo boards are also available for sale via credit card on this website. Demo boards are for evaluation purposes only. It remains the customer’s responsibility to verify proper and reliable operation in the actual end application.
| Part Number | Description | Price | Documentation |
|---|---|---|---|
| DC1505A | LTC4360-1/LTC4360-2 Overvoltage Protection Controller with Shutdown/Reverse Voltage Protection | $50.00 |