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LM25069 Arkusz danych(PDF) 1 Page - Texas Instruments

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Numer części LM25069
Szczegółowy opis  Positive Low Voltage Power Limiting Hot Swap Controller
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Producent  TI1 [Texas Instruments]
Strona internetowa  http://www.ti.com
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LM25069 Arkusz danych(HTML) 1 Page - Texas Instruments

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Power
Good
UVLO/EN
OVLO
PWR
GND
TIMER
PGD
OUT
VIN
SENSE GATE
LM25069
VOUT
VSYS
LM25069
www.ti.com
SNVS607D – FEBRUARY 2009 – REVISED DECEMBER 2010
LM25069 Positive Low Voltage Power Limiting Hot Swap Controller
Check for Samples: LM25069
1
FEATURES
2
Operating range: +2.9V to +17V
Programmable fault timer avoids nuisance
trips
In-rush current limit for safe board insertion
into live power sources
Active high open drain POWER GOOD output
Programmable maximum power dissipation in
Available in latched fault and automatic restart
the external pass device
versions
Adjustable current limit
APPLICATIONS
Circuit breaker function for severe over-
Server Backplane Systems
current events
Base Station Power Distribution Systems
Internal high side charge pump and gate driver
for external N-channel MOSFET
Solid State Circuit Breaker
Adjustable under-voltage lockout (UVLO) and
PACKAGE
hysteresis
Adjustable over-voltage lockout (OVLO) and
MSOP-10
hysteresis
Initial insertion timer allows ringing and
transients to subside after system connection
DESCRIPTION
The LM25069 positive hot swap controller provides 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
LM25069 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). The POWER GOOD output indicates when the output voltage is within 1.3V of
the input voltage. The input under-voltage and over-voltage lockout levels and hysteresis are programmable, as
well as the initial insertion delay time and fault detection time. The LM25069-1 latches off after a fault detection,
while the LM25069-2 automatically restarts at a fixed duty cycle. The LM25069 is available in a 10 pin MSOP
package.
Typical Application
Figure 1. Positive Power Supply Control
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.
2
All trademarks are the property of their respective owners.
PRODUCTION DATA information is current as of publication date.
Copyright © 2009–2010, Texas Instruments Incorporated
Products conform to specifications per the terms of the Texas
Instruments standard warranty. Production processing does not
necessarily include testing of all parameters.


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