Datasheet LTC4367 (Analog Devices)
| Fabricante | Analog Devices |
| Descripción | 100V Overvoltage, Undervoltage and Reverse Supply Protection Controller |
| Páginas / Página | 22 / 1 — FEATURES. DESCRIPTION. Wide Operating Voltage Range: 2.5V to 60V. … |
| Formato / tamaño de archivo | PDF / 880 Kb |
| Idioma del documento | Inglés |
FEATURES. DESCRIPTION. Wide Operating Voltage Range: 2.5V to 60V. Overvoltage Protection to 100V
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Versión de texto del documento
LTC4367 100V Overvoltage, Undervoltage and Reverse Supply Protection Controller
FEATURES DESCRIPTION
n
Wide Operating Voltage Range: 2.5V to 60V
The LTC®4367 protects applications where power sup- n
Overvoltage Protection to 100V
ply input voltages may be too high, too low or even n
Reverse Supply Protection to –40V
negative. It does this by controlling the gate voltages of n
LTC4367: Blocks 50Hz and 60Hz AC Power
a pair of external N-channel MOSFETs to ensure that the n
LTC4367: 32ms Recovery from Fault
output stays within a safe operating range.The LTC4367 n
LTC4367-1: Fast 500µs Recovery from Fault
withstands voltages between –40V and 100V and has an n
No Input Capacitor or TVS Required for Most
operating range of 2.5V to 60V, while consuming only
Applications
70µA in normal operation. n Adjustable Undervoltage and Overvoltage Thresholds Two comparator inputs allow configuration of the over- n Controls Back-to-Back N-Channel MOSFETs voltage (OV) and undervoltage (UV) set points using an n Low Operating Current: 70µA external resistive divider. A shutdown pin provides external n Low Shutdown Current: 5µA control for enabling and disabling the MOSFETs as well n 8-Pin MSOP and 3mm × 3mm DFN Packages as placing the device in a low current shutdown state. A fault output indicates that the GATE pin is pulling low when
APPLICATIONS
the part is in shutdown or the input voltage is outside the UV and OV set points. n Portable Instrumentation n Industrial Automation The LTC4367 has a 32ms turn-on delay that debounces n Automotive Surge (Load Dump) Protection live connections and blocks 50Hz to 60Hz AC power. For n Network Equipment fast recovery after faults, the LTC4367-1 has a reduced turn-on delay of 500µs. L, LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks and ThinSOT is a trademark of Analog Devices, Inc. All other trademarks are the property of their respective owners.
TYPICAL APPLICATION 24V Automotive Application with +100V, –40V Protection Load Protected from Reverse and Overvoltage at VIN
V Si7942 IN VOUT OV = 36V +70V 24V 2A UV = 7V 20V/DIV VIN GATE VIN VOUT VALID WINDOW 464k GND SHDN V V OUT OUT 1500k UV –40V 121k FAULT 20V/DIV VIN OV OV = 36V UV = 7V 29.4k GND 4367 TA01a 200ms/DIV 4367 TA01b LTC4367 4367fb For more information www.linear.com/LTC4367 1
FEATURES DESCRIPTION
n
Wide Operating Voltage Range: 2.5V to 60V
The LTC®4367 protects applications where power sup- n
Overvoltage Protection to 100V
ply input voltages may be too high, too low or even n
Reverse Supply Protection to –40V
negative. It does this by controlling the gate voltages of n
LTC4367: Blocks 50Hz and 60Hz AC Power
a pair of external N-channel MOSFETs to ensure that the n
LTC4367: 32ms Recovery from Fault
output stays within a safe operating range.The LTC4367 n
LTC4367-1: Fast 500µs Recovery from Fault
withstands voltages between –40V and 100V and has an n
No Input Capacitor or TVS Required for Most
operating range of 2.5V to 60V, while consuming only
Applications
70µA in normal operation. n Adjustable Undervoltage and Overvoltage Thresholds Two comparator inputs allow configuration of the over- n Controls Back-to-Back N-Channel MOSFETs voltage (OV) and undervoltage (UV) set points using an n Low Operating Current: 70µA external resistive divider. A shutdown pin provides external n Low Shutdown Current: 5µA control for enabling and disabling the MOSFETs as well n 8-Pin MSOP and 3mm × 3mm DFN Packages as placing the device in a low current shutdown state. A fault output indicates that the GATE pin is pulling low when
APPLICATIONS
the part is in shutdown or the input voltage is outside the UV and OV set points. n Portable Instrumentation n Industrial Automation The LTC4367 has a 32ms turn-on delay that debounces n Automotive Surge (Load Dump) Protection live connections and blocks 50Hz to 60Hz AC power. For n Network Equipment fast recovery after faults, the LTC4367-1 has a reduced turn-on delay of 500µs. L, LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks and ThinSOT is a trademark of Analog Devices, Inc. All other trademarks are the property of their respective owners.
TYPICAL APPLICATION 24V Automotive Application with +100V, –40V Protection Load Protected from Reverse and Overvoltage at VIN
V Si7942 IN VOUT OV = 36V +70V 24V 2A UV = 7V 20V/DIV VIN GATE VIN VOUT VALID WINDOW 464k GND SHDN V V OUT OUT 1500k UV –40V 121k FAULT 20V/DIV VIN OV OV = 36V UV = 7V 29.4k GND 4367 TA01a 200ms/DIV 4367 TA01b LTC4367 4367fb For more information www.linear.com/LTC4367 1