LT4356CMS-1#TRPBF Rectifier Diode Overvoltage Protection Regulator and Inrush Limiter
diode rectifier circuit
,signal schottky diode
LT4356CMS-1 Overvoltage Protection Regulator and Inrush Limiter
FEATURES
Stops High Voltage Surges
Adjustable Output Clamp Voltage
Overcurrent Protection n Wide Operation Range: 4V to 80V
Reverse Input Protection to –60V
Low 7μA Shutdown Current n Adjustable Fault Timer n Controls N-Channel MOSFET
Shutdown Pin Withstands –60V to 100V
Fault Output Indication
Spare Amplifi er for Level Detection Comparator or Linear Regulator Controller
Available in (4mm × 3mm) 12-Pin DFN or 10-Pin MSOP Packages
APPLICATIONS
Automotive/Avionic Surge Protection
Hot Swap/Live Insertion
High Side Switch for Battery Powered Systems
DESCRIPTION
The LT®4356-1 surge stopper protects loads from high voltage transients. It regulates the output during an overvoltage event, such as load dump in automobiles, by controlling the gate of an external N-Channel MOSFET. The output is limited to a safe value thereby allowing the loads to continue functioning. The LT4356-1 also monitors the voltage drop between the VCC and SNS pins to protect against overcurrent faults. An internal amplifi er limits the current sense voltage to 50mV. In either fault condition, a timer is started inversely proportional to MOSFET stress. If the timer expires, the FLT pin pulls low to warn of an impending power down. If the condition persists, the MOSFET is turned off. The spare amplifi er may be used as a voltage detection comparator or as a linear regulator controller driving an external PNP pass transistor. Back-to-back FETs can be used in lieu of a Schottky diode for reverse input protection, reducing voltage drop and power loss. A shutdown pin reduces the quiescent current to less than 7μA during shutdown.
TYPICAL APPLICATION
ABSOLUTE MAXIMUM RATINGS
VCC, SHDN ................................................ –60V to 100V
SNS ..............................VCC –30V or –60V to VCC + 0.3V
OUT, AOUT, FLT, EN .....................................–0.3V to 80V
GATE (Note 3) ................................ –0.3V to VOUT + 10V
FB, TMR, IN+ ................................................–0.3V to 6V
AOUT, EN, FLT .........................................................–3mA
Operating Temperature Range
LT4356C-1 ............................................... 0°C to 70°C
LT4356I-1 ............................................–40°C to 85°C
LT4356H-1 .........................................–40°C to 125°C
Storage Temperature Range
DE12 ..................................................–65°C to 125°C
MS .....................................................–65°C to 150°C
Lead Temperature (Soldering, 10 sec, MS10) ....... 300°C
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