LM25061/9 Hot Swap Controllers


Positive Low Voltage Power Limiting Hot Swap Controllers - Now Available at Digi-Key

National Semiconductor's LM25061/9 positive hot swap controllers provide intelligent control of the power supply voltage to the load during insertion and removal of circuit cards from a live system backplane or other "hot" power sources. The LM25061/9 provide in-rush current control to limit system voltage droop and transients. The current limit and power dissipation, in the external series N-Channel MOSFET, are programmable, ensuring operation within the Safe Operating Area (SOA). The POWER GOOD output indicates when the output voltage exceeds a programmable threshold. The input under-voltage level and hysteresis are programmable, as well as the initial insertion delay time and fault detection time. The LM25061/9-1 latches off after a fault detection, while the LM25061/9-2 automatically restarts at a fixed duty cycle. The LM25061/9 are available in a 10 pin MSOP package.
LM25061 Datasheet     LM25069 Datasheet
National Semiconductor LM25061 Hot Swap Controllers
  • Features
  • Applications
  • Diagram
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Features
  • Operating range: +2.9V to +17V
  • In-rush current limit for safe board insertion into live power sources
  • Programmable maximum power dissipation in the external pass device
  • Adjustable current limit
  • Circuit breaker function for severe over-current events
  • Internal high side charge pump and gate driver for external N-channel MOSFET
  • Adjustable under-voltage lockout (UVLO) 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
  • Base station power distribution systems
  • Solid state circuit breaker

 
RoHS Compliant


Typical Application Diagram

National Semiconductor LM25061 Hot Swap Controllers Application Diagram
National Semiconductor LM25069 Hot Swap Controllers Application Diagram



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 Available in Tape & Reel (TR-ND), Cut Tape (CT-ND), and custom Digi-Reel® (DKR-ND)
Digi-Key
Part Number
National Semi
Part Number
Functionality
Description
Package / Case
LM25061PMME-1/NOPB
Latches off after a fault detection
10-MSOP, Micro10™,
10-uMAX, 10-uSOP
LM25061PMME-2/NOPB
Automatically restarts at a fixed duty cycle
10-MSOP, Micro10™,
10-uMAX, 10-uSOP
LM25069PMME-1/NOPB
Latches off after a fault detection
10-MSOP, Micro10™,
10-uMAX, 10-uSOP
LM25069PMME-2/NOPB
Automatically restarts at a fixed duty cycle
10-MSOP, Micro10™,
10-uMAX, 10-uSOP