LT4256 Series

Positive High Voltage Hot Swap Controllers

Manufacturer: Analog Devices Inc./Maxim Integrated

Catalog

Positive High Voltage Hot Swap Controllers

Part	Supplier Device Package	Operating Temperature [Max]	Operating Temperature [Min]	Package / Case	Package / Case	Package / Case	Number of Channels [custom]	Mounting Type	Features	Applications	Current - Supply	Voltage - Supply [Max]	Voltage - Supply [Min]	Type	Programmable Features	Secondary Attributes	Primary Attributes	Contents	Utilized IC / Part	Package / Case [x]	Package / Case [y]
Analog Devices Inc./Maxim Integrated LT4256-1CS8#PBF	8-SO	70 °C	0 °C	0.154 in	8-SOIC	3.9 mm	1	Surface Mount	Latched Fault	General Purpose	1.8 mA	80 V	10.8 VDC	Hot Swap Controller	Current Limit Fault Timeout Slew Rate UVLO
Analog Devices Inc./Maxim Integrated DC1354A-B														Power Management		On-Board LEDs	Auto-Retry	Board(s)	LT4256-2
Analog Devices Inc./Maxim Integrated LT4256-3CGN#PBF	16-SSOP	70 °C	0 °C		16-SSOP		1	Surface Mount		General Purpose	1.8 mA	80 V	10.8 VDC	Hot Swap Controller	Auto Retry Current Limit Fault Timeout Latched Fault OVP Slew Rate UVLO					0.154 in	3.9 mm
Analog Devices Inc./Maxim Integrated DC1354A-A														Power Management		On-Board LEDs	Latch-Off	Board(s)	LT4256-1

Catalog

Positive High Voltage Hot Swap Controllers

Description

The LT4256-1/LT4256-2 are high voltage Hot Swap™controllers that allow a board to be safely inserted and removed from a live backplane. An internal driver drives an external N-channel MOSFET switch to control supply voltages ranging from 10.8V to 80V.The LT4256-1/LT4256-2 features an adjustable analog foldback current limit. If the supply remains in current limit for more than a programmable time, the N-channel MOSFET shuts off and the PWRGD output asserts low. The LT4256-2 automatically restarts after a time-out delay. The LT4256-1 latches off until the UV pin is cycled low.The PWRGD output indicates when the output voltage rises above a programmed level. An external resistor string from VCCprovides programmable undervoltage protection.The LT4256 can be used as an upgrade to LT1641 designs.The LT4256-1 and LT4256-2 are available in an 8-pin SO package that is pin compatible with the LT1641.Retry / Latch OffFeaturesPackageLT4256-1Latch OffUVSO-8LT4256-2RetryUVSO-8LT4256-3Latch Off or RetryUV/OV, Open Circuit DetectSSOP-16ApplicationsHot Board InsertionElectronic Circuit Breaker/Power BussingIndustrial High Side Switch/Circuit Breaker24V/48V Industrial/Alarm SystemsIdeally Suited for 12V, 24V and 48V Distributed Power Systems48V Telecom Systems