MAX5976A Datasheet, PDF (1/9 Pages) Maxim Integrated Products – 2.7V to 18V, 7A, Hot-Swap Solution Power-Good and Fault Outputs

19-5542; Rev 1; 4/11
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2.7V to 18V, 7A, Hot-Swap Solution
General Description
The MAX5976A/MAX5976B are integrated solutions for
hot-swap applications requiring the safe insertion and
removal of circuit line cards from a live backplane. The
devices integrate a hot-swap controller, 24mI power
MOSFET, and electronic circuit-breaker protection in a
single package. The ICs are designed for protection of
2.7V to 18V supply voltages.
The devices provide inrush current control and short-
circuit detection during startup. During normal operation,
the devices provide circuit-breaker protection against
overload and short-circuit conditions. The circuit-breaker
function disconnects the power to the load if the load
current exceeds the circuit-breaker limit. The devices
are factory-calibrated to deliver accurate overcurrent
protection with Q10% accuracy. During a fault condi-
tion, the MAX5976A enters an autoretry mode while the
MAX5976B latches off. Both versions feature a resistor-
adjustable variable speed circuit-breaker threshold and
overtemperature protection. Additional features include
power-good and fault indicator outputs.
The ICs are available in a 16-pin, 5mm x 5mm, TQFN-
EP package and fully specified over the -40^°C to +85^°C
operating temperature range.
RAID Systems
Storage Bridge Bay
Disk Drive Power
Server I/O Cards
Industrial
Applications
Features
S 2.7V to 18V Operating Voltage Range
S 24mI Internal Power MOSFET
S 7A Load Current Capability
S No Sense Resistor Required
S ±10% Circuit-Breaker Threshold Accuracy
S Adjustable Circuit-Breaker Current
S Variable Speed Circuit-Breaker Response
S Thermal Protection
S Power-Good and Fault Outputs
S Latch-Off or Automatic Retry Options
S Drive-Present Signal Input
S Active-Low and Active-High Enables
Ordering Information
PART
PIN PACKAGE
FAULT
MANAGEMENT
MAX5976AETE+ 16 TQFN-EP*
Autoretry
MAX5976BETE+ 16 TQFN-EP*
Latched Off
Note: All devices are specified over the -40°C to +85°C
operating temperature range.
+Denotes a lead(Pb)-free/RoHS-compliant package.
*EP = Exposed pad.
Typical Application Circuit
2.7V TO 18V
CIN
IN
TVS
R1
ON1
R2
RCB
CB
MAX5976A
MAX5976B
OUT
PRESDET
ON2
REG
CREG
PG
FAULT
GND
VIN
VPRESDET
REMOVABLE CARD
LOAD
(7A)
RON2
RPG
RFAULT
µP
2.7V TO 6V
________________________________________________________________ Maxim Integrated Products   1
For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642,
or visit Maxim’s website at www.maxim-ic.com.