LT4256-2IS8#TRPBF Hot Swap Voltage Controllers Hot Swap +48V Auto-Retry
♠ Product Description
| Product Attribute | Attribute Value |
| Manufacturer: | Analog Devices Inc. |
| Product Category: | Hot Swap Voltage Controllers |
| RoHS: | Details |
| Product: | Controllers & Switches |
| Current Limit: | Adjustable |
| Supply Voltage - Max: | 80 V |
| Supply Voltage - Min: | 10.8 V |
| Number of Channels: | 1 Channel |
| Operating Supply Current: | 1.8 mA |
| Minimum Operating Temperature: | - 40 C |
| Maximum Operating Temperature: | + 85 C |
| Mounting Style: | SMD/SMT |
| Package / Case: | SOIC-8 |
| Packaging: | Reel |
| Packaging: | Cut Tape |
| Packaging: | MouseReel |
| Power Fail Detection: | No |
| Brand: | Analog Devices |
| Height: | 1.75 mm |
| Product Type: | Hot Swap Voltage Controllers |
| Series: | LT4256-1 |
| Factory Pack Quantity: | 2500 |
| Subcategory: | PMIC - Power Management ICs |
| Unit Weight: | 0.006860 oz |
♠ LT4256-1/LT4256-2 Positive High Voltage Hot Swap Controllers
The LT® 4256-1/LT4256-2 are high voltage Hot SwapTM 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 VCC provides programmable undervoltage protection.
The LT4256 can be used as an upgrade to LT1641 designs. See Table 1 on page 14 for upgraded specifications.
The LT4256-1 and LT4256-2 are available in an 8-pin SO package that is pin compatible with the LT1641.
■ Allows Safe Board Insertion and Removal from a Live Backplane
■ Controls Supply Voltage from 10.8V to 80V
■ Foldback Current Limiting
■ Overcurrent Fault Detection
■ Drives an External N-Channel MOSFET
■ Programmable Supply Voltage Power-Up Rate
■ Undervoltage Protection
■ Latch Off Operation Mode (LT4256-1)
■ Automatic Retry (LT4256-2)
■ Available in an 8-Pin SO Package
■ Hot Board Insertion
■ Electronic Circuit Breaker/Power Bussing
■ Industrial High Side Switch/Circuit Breaker
■ 24V/48V Industrial/Alarm Systems
■ Ideally Suited for 12V, 24V and 48V Distributed Power Systems
■ 48V Telecom Systems
