The MAX5902/MAX5903 are hot-swap controllers that
allow a circuit card to be safely hot plugged into a live
backplane without causing a glitch on the power-supply
rail. These devices operate from +9V to +72V and
provide the simplest hot-swap solution by eliminating all
external components except the external p-channel
MOSFET.
The MAX5902/MAX5903 limit the inrush current to the
load and provide a circuit-breaker function for overcurrent
protection. During startup the circuit-breaker function is
disabled and the MAX5902/MAX5903 limit the inrush current
by gradually turning on the external MOSFET. Once
the external MOSFET is fully enhanced, the circuit-breaker
function is enabled and the MAX5902/MAX5903 provide
overcurrent protection by monitoring the voltage
drop across the external MOSFET's on-resistance.
The MAX5902/MAX5903 include an undervoltage lockout
(UVLO) function, ON/active-low OFF control input, and a
power-good status output, active-low PGOOD (MAX5902) or
PGOOD (MAX5903). A built-in thermal shutdown feature
is also included to protect the external MOSFET in
case of overheating.
The MAX5902/MAX5903 offer latched or autoretry fault
management and are available with 300mV, 400mV or
500mV circuit-breaker thresholds. Both the MAX5902 and
MAX5903 are available in small SOT23 and TDFN packages,
and are specified for the extended -40°C to +85°C
temperature range. For specific ordering information, see
the Selector Guide at the end of the data sheet.
주요기능
애플리케이션/용도
Wide +9V to +72V Operation
Requires No External Sense Resistor
Drives External p-Channel MOSFET
Limits Inrush Current
Circuit-Breaker Function
Less than 2mA Quiescent Current
ON/Active-Low OFF Input Permits Load Power-Supply
Control and Sequencing
Adjustable Undervoltage Lockout
Power-Good Output with +72V Rating
Latching or Automatic Retry Fault Management
Thermal Shutdown Helps Protect the External
MOSFET
Notes: **This pricing is BUDGETARY, for comparing similar parts. Prices are in
U.S. dollars and subject to change. Quantity pricing may vary
substantially and international prices may differ due to local
duties, taxes, fees, and exchange rates. For volume-specific prices
and delivery, please see the price and availability page
or contact an authorized distributor.
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