LT4356-1 and LT4356-2 - Surge Stopper _ BDTIC a Leading Distributor in China

LT4356-1 and LT4356-2 - Surge Stopper

The LT4356 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 also monitors the voltage drop between the VCC and SNS pins to protect against overcurrent faults. An internal amplifier 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. After a cool down period, the GATE pin pulls up turning on the MOSFET again.

The auxiliary amplifier 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 for the LT4356-1 during shutdown. The LT4356-2 differs from the LT4356-1 during shutdown by reducing the quiescent current to 60μA and keeping alive the auxiliary amplifier for uses such as an undervoltage lockout or always-on regulator.

Features

Stops High Voltage Surges
Adjustable Output Clamp Voltage
Overcurrent Protection
Wide Operation Range: 4V to 80V
Reverse Input Protection to –60V
Low 7μA Shutdown Current, LT4356-1
Adjustable Fault Timer
Controls N-channel MOSFET
Shutdown Pin Withstands –60V to 100V
Fault Output Indication
Guaranteed Operation to 125°C
Auxiliary Amplifier for Level Detection Comparator or Linear Regulator Controller
Available in (4mm × 3mm) 12-Pin DFN, 10-Pin MSOP or 16-Pin SO Packages

Typical Application

Applications

Automotive/Avionic Surge Protection
Hot Swap/Live Insertion
High Side Switch for Battery Powered Systems
Intrinsic Safety Applications

Packaging

**Order Information**
Part Number	Package	Temp	Price(1-99)	Price (1k)*
LT4356CDE-1#PBF	4x3 DFN-12	C	$2.83	$1.98
LT4356CDE-1#TRPBF	4x3 DFN-12	C		$2.08
LT4356CDE-2#PBF	4x3 DFN-12	C	$2.83	$1.98
LT4356CDE-2#TRPBF	4x3 DFN-12	C		$2.08
LT4356CMS-1#PBF	MS-10	C	$2.83	$1.98
LT4356CMS-1#TRPBF	MS-10	C		$2.04
LT4356CS-1#PBF	SO-16	C	$2.83	$1.98
LT4356CS-1#TRPBF	SO-16	C		$2.04
LT4356CS-2#PBF	SO-16	C	$2.83	$1.98
LT4356CS-2#TRPBF	SO-16	C		$2.04
LT4356HDE-1#PBF	4x3 DFN-12	H	$3.70	$2.59
LT4356HDE-1#TRPBF	4x3 DFN-12	H		$2.69
LT4356HDE-2#PBF	4x3 DFN-12	H	$3.70	$2.59
LT4356HDE-2#TRPBF	4x3 DFN-12	H		$2.69
LT4356HMS-1#PBF	MS-10	H	$3.70	$2.59
LT4356HMS-1#TRPBF	MS-10	H		$2.65
LT4356HS-1#PBF	SO-16	H	$3.70	$2.59
LT4356HS-1#TRPBF	SO-16	H		$2.65
LT4356HS-2#PBF	SO-16	H	$3.70	$2.59
LT4356HS-2#TRPBF	SO-16	H		$2.65
LT4356IDE-1#PBF	4x3 DFN-12	I	$3.39	$2.38
LT4356IDE-1#TRPBF	4x3 DFN-12	I		$2.48
LT4356IDE-2#PBF	4x3 DFN-12	I	$3.39	$2.38
LT4356IDE-2#TRPBF	4x3 DFN-12	I		$2.48
LT4356IMS-1#PBF	MS-10	I	$3.39	$2.38
LT4356IMS-1#TRPBF	MS-10	I		$2.44
LT4356IS-1#PBF	SO-16	I	$3.39	$2.38
LT4356IS-1#TRPBF	SO-16	I		$2.44
LT4356IS-2#PBF	SO-16	I	$3.40	$2.38
LT4356IS-2#TRPBF	SO-16	I		$2.44

Demo Boards


Part Number	Description	Price
DC1018B-A	LT4356-1 Demo \| Overvoltage Protection Regulator with Auto-retry	$50.00
DC1018B-B	LT4356-2 Demo \| Overvoltage Protection Regulator with Auto-retry, Aux Amplifier remains on during Shutdown	$50.00