LM5067_14 Datasheet, PDF (1/33 Pages) Texas Instruments – Negative Hot Swap / Inrush Current Controller with Power Limiting

LM5067
www.ti.com
SNVS532B – OCTOBER 2007 – REVISED SEPTEMBER 2009
LM5067 Negative Hot Swap / Inrush Current Controller with Power Limiting
Check for Samples: LM5067
FEATURES
1
•2 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
• 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
PACKAGE
• MSOP-10
• SO-14 (Latched Fault Version)
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 N-Channel MOSFET are programmable, ensuring operation within the
Safe Operating Area (SOA). In addition, the LM5067 provides circuit protection by monitoring for over-current
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.
1
Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of
Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
All trademarks are the property of their respective owners.
2
PRODUCTION DATA information is current as of publication date.
Products conform to specifications per the terms of the Texas
Instruments standard warranty. Production processing does not
necessarily include testing of all parameters.
Copyright © 2007–2009, Texas Instruments Incorporated