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LM5067

National Semiconductor
Part Number LM5067
Manufacturer National Semiconductor
Description Negative Hot Swap / Inrush Current Controller
Published Feb 8, 2010
Detailed Description LM5067 Negative Hot Swap / Inrush Current Controller with Power Limiting September 9, 2009 LM5067 Negative Hot Swap / ...
Datasheet PDF File LM5067 PDF File

LM5067
LM5067

Overview
LM5067 Negative Hot Swap / Inrush Current Controller with Power Limiting September 9, 2009 LM5067 Negative Hot Swap / Inrush Current Controller with Power Limiting General Description The LM5067 negative hot swap controller provides intelligent control of the power supply connections during insertion and removal of circuit cards from a live system backplane or other “hot” power sources.
The LM5067 provides in-rush current control to limit system voltage droop and transients.
The current limit and power dissipation in the external series pass NChannel MOSFET are programmable, ensuring operation within the Safe Operating Area (SOA).
In addition, the LM5067 provides circuit protection by monitoring for overcurrent and over-voltage conditions.
The POWER GOOD output indicates when the output voltage is close to the input voltage.
The input under-voltage and over-voltage lockout levels and hysteresis are programmable, as well as the fault detection time.
The LM5067-1 latches off after a fault detection, while the LM5067-2 automatically attempts restarts at a fixed duty cycle.
The LM5067 is available in a 10 pin MSOP package and a 14 pin SOIC package.
■ ■ ■ ■ ■ Adjustable current limit Circuit breaker function for severe over-current events Adjustable under-voltage lockout (UVLO) and hysteresis Adjustable over-voltage lockout (OVLO) and hysteresis Initial insertion timer allows ringing and transients to subside after system connection ■ Programmable fault timer avoids nuisance trips ■ Active high open drain POWER GOOD output ■ Available in latched fault and automatic restart versions Applications ■ ■ ■ ■ ■ ■ ■ Server Backplane Systems In-Rush Current Limiting Solid State Circuit Breaker Transient Voltage Protector Solid State Relay Under-voltage Lock-out Power Good Detector/Indicator Features ■ Wide operating range: -9V to -80V ■ In-rush current limit for safe board insertion into live power sources ■ Programmable maximum power dissipation in the external pass device...


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