SMH4811A_09 Datasheet, PDF (1/15 Pages) Summit Microelectronics, Inc. – Programmable Distributed Power Hot-Swap Controller for High-Availability Systems

SUMMIT
MICROELECTRONICS, Inc.
Programmable Distributed Power Hot-Swap Controller
for High-Availability Systems
SMH4811A
Preliminary
FEATURES
z Soft Starts Main Power Supply on Card Insertion
or System Power Up
z Senses Card Insertion via Short Pins or Ejector
Switches
z Master Enable to Allow System Control of
Power Up or Down
Š Can be used as a Temperature Sense Input
z Programmable Independent Controls of a DC/DC
Converter
Š Not Enabled until Host Supply Fully Soft
Started
Š Programmable Time Delay
Š Available Input to hold off Dependant En-
ables until Conditions are Satisfied
z Highly Programmable Circuit Breaker
Š Programmable Quick-Trip^TM Values
Š Programmable Current Limiting
Š Programmable Duty Cycle Times
Š Programmable Over-current Filter
z Programmable Host Voltage Fault Monitoring
Š Programmable Under-Voltage Hysteresis
Š Programmable UV/OV Voltage Filter
Š Programmable Fault Mode: Latched or Duty
Cycle
z Programmable Forced Shutdown Timer
z 2.5V and 5.0V Reference Outputs
Š Eliminates the Need for Other Primary
Voltages
Š Easy Expansion of External Monitor Func-
tions
z Internal Shunt Regulator Allows a Wide Supply
Range
SIMPLIFIED APPLICATION DRAWING
0V
Disable/Enable
Pin Detect
Pin Detect
PD1#
VDD
ENPG
UV
SMH4811A
OV
FAULT#
PG#
PD2#
VSS
CBSENSE VGATE 2.5VREF 5.0VREF
DC/DC
–48V
2044 SAD 5.1
©SUMMIT MICROELECTRONICS, Inc., 2006 • 757 North Mary Ave • Sunnyvale, CA 94085 • Phone [phone] • FAX [phone] • www.summitmicro.com
Characteristics subject to change without notice
2044 6.6 03/27/09
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