DocumentationDatasheet
Design Note
- DN497 - Protect Sensitive Circuits from Overvoltage and Reverse Supply Connections
- DN549 - Powering Altera Arria 10 FPGA and Arria 10 SoC: Tested and Verified Power Management Solutions
Reliability Data
Product Selector Card
LT Journal
- Avoid Debugging Cycles in Power Management for FPGA, GPU and ASIC Systems
- No Blocking Diode Needed to Protect Sensitive Circuits from Overvoltage and Reverse Supply Connections
Press Release
- Proven Power Solutions for Altera Arria 10 FPGA
- Supply Protection Controller Guards Against Overvoltage, Undervoltage & Reverse Polarity Faults
cad_symbol
ltspice
Features
- Wide Operating Voltage Range: 2.5V to 34V
- Overvoltage Protection to 60V
- Reverse Supply Protection to –40V
- LTC4365: Blocks 50Hz and 60Hz AC Power
- LTC4365-1: Fast (1ms) Recovery from Fault
- No Input Capacitor or TVS Required for Most Applications
- Adjustable Undervoltage and Overvoltage Protection Range
- Charge Pump Enhances External N-Channel MOSFET
- Low Operating Current: 125μA
- Low Shutdown Current: 10μA
- Compact 8-Lead, 3mm × 2mm DFN and TSOT-23 (ThinSOT™) Packages
Typical Application
Description
The LTC®4365 protects applications where power supply input voltages may be too high, too low or even negative. It does this by controlling the gate voltages of a pair of external N-channel MOSFETs to ensure that the output stays within a safe operating range.The LTC4365 can withstand voltages between –40V and 60V and has an operating range of 2.5V to 34V, while consuming only 125μA in normal operation.
Two comparator inputs allow configuration of the overvoltage (OV) and undervoltage (UV) set points using an external resistive divider. A shutdown pin provides external control for enabling and disabling the MOSFETs as well as placing the device in a low current shutdown state. A fault output provides status of the gate pin pulling low. A fault is indicated when the part is in shutdown or the input voltage is outside the UV and OV set points.
The LTC4365 has a 36ms turn-on delay that debounces live connections and blocks 50Hz to 60Hz AC power. For fast recovery after faults, the LTC4365-1 has a reduced 1ms turn-on delay.
3x2 DFN-8,SOT-23
Package Variations and Pricing
| Part Number | Package | Pins | Temp | Price (1-99) |
Price (1k)* |
|---|---|---|---|---|---|
| LTC4365CDDB#PBF | DFN | 8 | C | $2.18 | |
| LTC4365CDDB#TRMPBF | DFN | 8 | C | $2.18 | $1.54 |
| LTC4365CDDB#TRPBF | DFN | 8 | C | $2.13 | $1.49 |
| LTC4365CDDB-1#PBF | DFN | 8 | C | $2.18 | |
| LTC4365CDDB-1#TRMPBF | DFN | 8 | C | $2.18 | $1.54 |
| LTC4365CDDB-1#TRPBF | DFN | 8 | C | $2.13 | $1.49 |
| LTC4365CTS8#PBF | SOT | 8 | C | $2.18 | |
| LTC4365CTS8#TRMPBF | SOT | 8 | C | $2.18 | $1.54 |
| LTC4365CTS8#TRPBF | SOT | 8 | C | $2.13 | $1.49 |
| LTC4365CTS8-1#PBF | SOT | 8 | C | $2.18 | |
| LTC4365CTS8-1#TRMPBF | SOT | 8 | C | $2.18 | $1.54 |
| LTC4365CTS8-1#TRPBF | SOT | 8 | C | $2.13 | $1.49 |
| LTC4365HDDB#PBF | DFN | 8 | H | $2.63 | |
| LTC4365HDDB#TRMPBF | DFN | 8 | H | $2.63 | $1.85 |
| LTC4365HDDB#TRPBF | DFN | 8 | H | $2.58 | $1.80 |
| LTC4365HDDB-1#PBF | DFN | 8 | H | $2.63 | |
| LTC4365HDDB-1#TRMPBF | DFN | 8 | H | $2.63 | $1.85 |
| LTC4365HDDB-1#TRPBF | DFN | 8 | H | $2.58 | $1.80 |
| LTC4365HTS8#PBF | SOT | 8 | H | $2.63 | |
| LTC4365HTS8#TRMPBF | SOT | 8 | H | $2.63 | $1.85 |
| LTC4365HTS8#TRPBF | SOT | 8 | H | $2.58 | $1.80 |
| LTC4365HTS8-1#PBF | SOT | 8 | H | $2.63 | |
| LTC4365HTS8-1#TRMPBF | SOT | 8 | H | $2.63 | $1.85 |
| LTC4365HTS8-1#TRPBF | SOT | 8 | H | $2.58 | $1.80 |
| LTC4365IDDB#PBF | DFN | 8 | I | $2.39 | |
| LTC4365IDDB#TRMPBF | DFN | 8 | I | $2.39 | $1.69 |
| LTC4365IDDB#TRPBF | DFN | 8 | I | $2.34 | $1.64 |
| LTC4365IDDB-1#PBF | DFN | 8 | I | $2.39 | |
| LTC4365IDDB-1#TRMPBF | DFN | 8 | I | $2.39 | $1.69 |
| LTC4365IDDB-1#TRPBF | DFN | 8 | I | $2.34 | $1.64 |
| LTC4365ITS8#PBF | SOT | 8 | I | $2.39 | |
| LTC4365ITS8#TRMPBF | SOT | 8 | I | $2.39 | $1.69 |
| LTC4365ITS8#TRPBF | SOT | 8 | I | $2.34 | $1.64 |
| LTC4365ITS8-1#PBF | SOT | 8 | I | $2.39 | |
| LTC4365ITS8-1#TRMPBF | SOT | 8 | I | $2.39 | $1.69 |
| LTC4365ITS8-1#TRPBF | SOT | 8 | I | $2.34 | $1.64 |
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 |
|---|---|---|---|
| DC1555B | LTC4365CTS8 Demo Board: High Voltage NFET Driver for UV, OV and Reverse Supply Protection | $25.00 | |
| DC1555C-B | LTC4365CTS8-1 Demo Board | High Voltage NFET Driver for UV, OV and Reverse Supply Protection with 1ms Fault Recovery | $25.00 |