The LM5068 hot-swap controller provides intelligent control of power supply connections during the insertion and removal of circuit cards powered by live system backplanes.

The LM5068 provides both in-rush current control and short-circuit protection functions, and limits power supply transients in the backplane caused by the insertion of additional circuit cards. The LM5068 controls the external N-Channel MOSFET to provide programmable load current limiting and circuit breaker functions using a single external current sense resistor. The LM5068 issues a power good (PWRGD) signal at the conclusion of a successful power-on sequence. Input over-voltage or under -voltage fault conditions will cancel the PWRGD indication.

The LM5068-1 and -2 indicate power-good as an open-drain active HIGH PWRGD state. The LM5068-3 and -4 indicate power-good as an open-drain active LOW PWRGD state. The LM5068-1 and -3 latch off after a fault condition is detected while the LM5068-2 and -4 continuously re-try at intervals set by a programmable timer.

The LM5068 is available in a VSSOP-8 package.

• Safe Module Insertion and Removal from Live Backplanes
• In-Rush Current Limiting for Safe Board Insertion into Live Backplanes
• Fast Response to Over-Current Fault Conditions with Active Current Limiting
• -10V to -90V Input Range
• Programmable Under-Voltage/Over-Voltage Shutdown Protection with Adjustable Hysteresis
• Programmable Multi-Function Timer for Board Insertion De-Bounce Delay
• Fault Timer Avoids Nuisance Trips Caused by Short Duration Load Transients
• Active Gate Clamping During Initial Power Application
• Available in both Latched Fault and Automatic Re-Try Versions
• Available with either Active HIGH or Active LOW Power Good Flag

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• FET
• External
• Vin (Min) (V)
• -90
• Vin (Max) (V)
• -10
• Vabsmax_cont (V)
• -100
• Current limit (Min) (A)
• 0.01
• Current limit (Max) (A)
• 500
• Overcurrent response
• Circuit breaker, Current limiting
• Fault response
• Auto-retry, Latch-off

LM5068的完整型号有：LM5068MM-2/NOPB、LM5068MM-4/NOPB、LM5068MMX-2/NOPB，以下是这些产品的关键参数及官网采购报价：

LM5068MM-2/NOPB，工作温度：-40 to 105，封装：VSSOP (DGK)-8，包装数量MPQ：1000个，MSL 等级/回流焊峰值温度：Level-1-260C-UNLIM，引脚镀层/焊球材料：SN，TI官网LM5068MM-2/NOPB的批量USD价格：1.7（1000+）

LM5068MM-4/NOPB，工作温度：-40 to 105，封装：VSSOP (DGK)-8，包装数量MPQ：1000个，MSL 等级/回流焊峰值温度：Level-1-260C-UNLIM，引脚镀层/焊球材料：SN，TI官网LM5068MM-4/NOPB的批量USD价格：1.417（1000+）

LM5068MMX-2/NOPB，工作温度：-40 to 105，封装：VSSOP (DGK)-8，包装数量MPQ：3500个，MSL 等级/回流焊峰值温度：Level-1-260C-UNLIM，引脚镀层/焊球材料：SN，TI官网LM5068MMX-2/NOPB的批量USD价格：1.417（1000+）

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