Datasheet LTC4365 (Analog Devices)
| Fabricante | Analog Devices |
| Descripción | Overvoltage, Undervoltage and Reverse Supply Protection Controller |
| Páginas / Página | 20 / 1 — FEATURES. DESCRIPTION. Wide Operating Voltage Range: 2.5V to 34V. … |
| Revisión | B |
| Formato / tamaño de archivo | PDF / 1.1 Mb |
| Idioma del documento | Inglés |
FEATURES. DESCRIPTION. Wide Operating Voltage Range: 2.5V to 34V. Overvoltage Protection to 60V
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Versión de texto del documento
LTC4365 Overvoltage, Undervoltage and Reverse Supply Protection Controller
FEATURES DESCRIPTION
n
Wide Operating Voltage Range: 2.5V to 34V
The LTC®4365 protects applications where power supply n
Overvoltage Protection to 60V
input voltages may be too high, too low or even negative. n
Reverse Supply Protection to –40V
It does this by controlling the gate voltages of a pair of n
LTC4365: Blocks 50Hz and 60Hz AC Power
external N-channel MOSFETs to ensure that the output n
LTC4365-1: Fast (1ms) Recovery from Fault
stays within a safe operating range.The LTC4365 can n
No Input Capacitor or TVS Required for Most
withstand voltages between –40V and 60V and has an
Applications
operating range of 2.5V to 34V, while consuming only n Adjustable Undervoltage and Overvoltage 125µA in normal operation. Protection Range Two comparator inputs allow configuration of the over- n Charge Pump Enhances External N-Channel MOSFET voltage (OV) and undervoltage (UV) set points using an n Low Operating Current: 125µA external resistive divider. A shutdown pin provides external n Low Shutdown Current: 10µA control for enabling and disabling the MOSFETs as well n Compact 8-Lead, 3mm × 2mm DFN and as placing the device in a low current shutdown state. A TSOT-23 (ThinSOT™) Packages fault output provides status of the gate pin pulling low. A n AEC-Q100 Qualified for Automotive Applications fault is indicated when the part is in shutdown or the input voltage is outside the UV and OV set points.
APPLICATIONS
The LTC4365 has a 36ms turn-on delay that debounces live connections and blocks 50Hz to 60Hz AC power. For n Portable Instrumentation fast recovery after faults, the LTC4365-1 has a reduced n Industrial Automation 1ms turn-on delay. n Laptops n Automotive Surge Protection All registered trademarks and trademarks are the property of their respective owners. Protected by U.S. patents, including XXXXX, XXXXX.
TYPICAL APPLICATION 12V Automotive Application Load Protected from Reverse and Overvoltage at VIN
V SiSB46DN IN VOUT UV = 5V 12V 3A 30V OV = 18V VIN GATE VALID VIN VOUT WINDOW LTC4365 V 510k OUT GND VOUT SHDN 2740k UV FAULT 10V/DIV VIN 215k –30V OV 4365 TA01b OV = 18V 1s/DIV 84.5k GND UV = 5V 4365 TA01a Rev. B Document Feedback For more information www.analog.com 1 Document Outline Features Applications Typical Application Description Absolute Maximum Ratings Pin Configuration Order Information Electrical Characteristics Typical Performance Characteristics Pin Functions Block Diagram Operation Applications Information Package Description Revision History Typical Application Related Parts
FEATURES DESCRIPTION
n
Wide Operating Voltage Range: 2.5V to 34V
The LTC®4365 protects applications where power supply n
Overvoltage Protection to 60V
input voltages may be too high, too low or even negative. n
Reverse Supply Protection to –40V
It does this by controlling the gate voltages of a pair of n
LTC4365: Blocks 50Hz and 60Hz AC Power
external N-channel MOSFETs to ensure that the output n
LTC4365-1: Fast (1ms) Recovery from Fault
stays within a safe operating range.The LTC4365 can n
No Input Capacitor or TVS Required for Most
withstand voltages between –40V and 60V and has an
Applications
operating range of 2.5V to 34V, while consuming only n Adjustable Undervoltage and Overvoltage 125µA in normal operation. Protection Range Two comparator inputs allow configuration of the over- n Charge Pump Enhances External N-Channel MOSFET voltage (OV) and undervoltage (UV) set points using an n Low Operating Current: 125µA external resistive divider. A shutdown pin provides external n Low Shutdown Current: 10µA control for enabling and disabling the MOSFETs as well n Compact 8-Lead, 3mm × 2mm DFN and as placing the device in a low current shutdown state. A TSOT-23 (ThinSOT™) Packages fault output provides status of the gate pin pulling low. A n AEC-Q100 Qualified for Automotive Applications fault is indicated when the part is in shutdown or the input voltage is outside the UV and OV set points.
APPLICATIONS
The LTC4365 has a 36ms turn-on delay that debounces live connections and blocks 50Hz to 60Hz AC power. For n Portable Instrumentation fast recovery after faults, the LTC4365-1 has a reduced n Industrial Automation 1ms turn-on delay. n Laptops n Automotive Surge Protection All registered trademarks and trademarks are the property of their respective owners. Protected by U.S. patents, including XXXXX, XXXXX.
TYPICAL APPLICATION 12V Automotive Application Load Protected from Reverse and Overvoltage at VIN
V SiSB46DN IN VOUT UV = 5V 12V 3A 30V OV = 18V VIN GATE VALID VIN VOUT WINDOW LTC4365 V 510k OUT GND VOUT SHDN 2740k UV FAULT 10V/DIV VIN 215k –30V OV 4365 TA01b OV = 18V 1s/DIV 84.5k GND UV = 5V 4365 TA01a Rev. B Document Feedback For more information www.analog.com 1 Document Outline Features Applications Typical Application Description Absolute Maximum Ratings Pin Configuration Order Information Electrical Characteristics Typical Performance Characteristics Pin Functions Block Diagram Operation Applications Information Package Description Revision History Typical Application Related Parts