MAX5902 Maxim, MAX5902 Datasheet
MAX5902
Manufacturer Part Number
MAX5902
Description
+72V SOT23 Simple Swapper Hot-Swap Controllers
Manufacturer
Maxim
Datasheet
1.MAX5902.pdf
(11 pages)
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The MAX5902/MAX5903 are SOT23 hot-swap con-
trollers 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 overcur-
rent protection. During startup the circuit breaker func-
tion 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 MOS-
FET’s on-resistance.
The MAX5902/MAX5903 include an undervoltage lock-
out (UVLO) function, ON/OFF control input and a
power-good status output, PGOOD (MAX5902) or
PGOOD (MAX5903). A built in thermal shutdown fea-
ture is also included to protect the external MOSFET in
case of overheating.
The MAX5902/MAX5903 offer latched or auto-retry fault
management and are available with 300mV, 400mV or
500mV circuit breaker thresholds. Both the MAX5902
and MAX5903 are available in a small SOT23 package,
and are specified for the extended -40°C to +85°C tem-
perature range. For specific ordering information refer
to the selector guide at the end of the data sheet.
19-1988; Rev 1; 9/02
For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at
1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com.
( ) ARE FOR MAX5903 ONLY.
TOP VIEW
Network Routers
Network Switches
Base Station Line
Cards
DRAIN
GATE
V
________________________________________________________________ Maxim Integrated Products
S
1
2
3
+72V SOT23 Simple Swapper Hot-Swap
General Description
SOT23-6
MAX5902
MAX5903
Pin Configuration
Servers
RAID
Industrial Systems
4
6
5
Applications
ON/OFF
PGOOD (PGOOD)
GND
o Wide +9V to +72V Operation
o Requires No External Sense Resistor
o Drives External P-Channel MOSFET
o Limits Inrush Current
o Circuit Breaker Function
o Less than 2mA Quiescent Current
o ON/OFF Input Permits Load Power-Supply
o Adjustable Undervoltage Lockout
o Power-Good Output with +72V Rating
o Latching or Automatic Retry Fault Management
o Thermal Shutdown Helps Protect the External
o Space-Saving SOT23-6 Package
Typical Operating Circuits continued at end of data sheet.
Simple Swapper is a trademark of Maxim Integrated Products Inc.
*For specific part numbers see Selector Guide at end of data
sheet.
BACKPLANE CIRCUIT CARD
+48V
GND
MAX5902_ _EUT*
MAX5903_ _EUT*
Control and Sequencing
MOSFET
PART
HOT-SWAP CONTROLLER
Typical Operating Circuits
V
ON/OFF
GND
S
MAX5902
PGOOD
DRAIN
GATE
Ordering Information
-40°C to +85°C
-40°C to +85°C
TEMP RANGE
IRFR5410
Controllers
PIN-PACKAGE
6-SOT23
6-SOT23
Features
V
ON/OFF
V
IN
IN
POWER SUPPLY
50W ISOLATED
(+)
(-)
JW050A1
LUCENT
1
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