Datasheet MAX5902, MAX5903 (Maxim)

19-1988; Rev 3; 1/07
+72V, SOT23/TDFN, Simple Swapper Hot-Swap Controllers MAX5902/MAX5903 General Description Features
The MAX5902/MAX5903 are hot-swap controllers that ♦
Wide +9V to +72V Operation
allow a circuit card to be safely hot plugged into a live backplane without causing a glitch on the power-sup- ♦
Requires No External Sense Resistor
ply rail. These devices operate from +9V to +72V and ♦
Drives External p-Channel MOSFET
provide the simplest hot-swap solution by eliminating all external components except the external p-channel ♦
Limits Inrush Current
MOSFET. ♦
Circuit-Breaker Function
The MAX5902/MAX5903 limit the inrush current to the ♦
Less than 2mA Quiescent Current
load and provide a circuit-breaker function for overcurrent protection. During startup the circuit-breaker function is ♦
ON/
OFF
Input Permits Load Power-Supply
disabled and the MAX5902/MAX5903 limit the inrush cur-
Control and Sequencing
rent by gradually turning on the external MOSFET. Once the external MOSFET is fully enhanced, the circuit-break- ♦
Adjustable Undervoltage Lockout
er function is enabled and the MAX5902/MAX5903 pro- ♦
Power-Good Output with +72V Rating
vide overcurrent protection by monitoring the voltage drop across the external MOSFET’s on-resistance. ♦
Latching or Automatic Retry Fault Management
The MAX5902/MAX5903 include an undervoltage lock- ♦
Thermal Shutdown Helps Protect the External
out (UVLO) function, ON/OFF control input, and a
MOSFET
power-good status output, PGOOD (MAX5902) or PGOOD (MAX5903). A built-in thermal shutdown fea- ♦
Available in Two Small Packages
ture is also included to protect the external MOSFET in
6-Pin TDFN and SOT23
case of overheating. The MAX5902/MAX5903 offer latched or autoretry fault
Ordering Information
management and are available with 300mV, 400mV or
PIN- PKG
500mV circuit-breaker thresholds. Both the MAX5902 and
PART TEMP RANGE PACKAGE CODE
MAX5903 are available in small SOT23 and TDFN pack- ages, and are specified for the extended -40°C to +85°C
MAX5902
_ _EUT-T+* -40°C to +85°C 6 SOT23-6 U6F+6 temperature range. For specific ordering information, see MAX5902_ _ETT-T+* -40°C to +85°C 6 TDFN-6 T633+2 the Selector Guide at the end of the data sheet.
MAX5903
_ _EUT-T+* -40°C to +85°C 6 SOT23-6 U6F+6
Applications
MAX5903_ _ETT-T+* -40°C to +85°C 6 TDFN-6 T633+2 *For specific part numbers see the Selector Guide at end of Network Routers Servers data sheet. Network Switches RAID +Denotes lead-free package. Base Station Line Industrial Systems
Typical Operating Circuits
Cards
Pin Configurations
50W ISOLATED BACKPLANE CIRCUIT CARD POWER SUPPLY IRFR5410 TOP VIEW +48V HOT-SWAP CONTROLLER VS 1 6 ON/OFF VIN (+) LUCENT MAX5902 JW050A1 MAX5902 DRAIN 2 5 PGOOD (PGOOD) MAX5903 VS GATE ON/OFF DRAIN GND PGOOD ON/OFF GATE 3 4 GND VIN (-) GND
SOT23-6
Typical Operating Circuits continued at end of data sheet. ( ) ARE FOR MAX5903 ONLY. Pin Configurations continued at end of data sheet. Simple Swapper is a trademark of Maxim Integrated Products, Inc.
________________________________________________________________ Maxim Integrated Products 1 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.