MAX5900 Datasheet, PDF (1/11 Pages) Maxim Integrated Products – -100V SOT23 Simple Swapper Hot-Swap Controllers

19-1988; Rev 3; 8/03
-100V SOT23 Simple Swapper Hot-Swap
Controllers
General Description
The MAX5900/MAX5901 are SOT23 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
-100V and provide the simplest hot-swap solution by
eliminating all external components except an external
N-channel MOSFET.
The MAX5900/MAX5901 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 MAX5900/MAX5901 limit the inrush cur-
rent by gradually turning on the external MOSFET. Once
the external MOSFET is fully enhanced, the circuit break-
er function is enabled and the MAX5900/MAX5901 pro-
vide overcurrent protection by monitoring the voltage
drop across the external MOSFET’s on-resistance.
The MAX5900/MAX5901 include an undervoltage lock-
out (UVLO) function, ON/OFF control input, and a power-
good status output, PGOOD (MAX5900) or PGOOD
(MAX5901). A built-in thermal shutdown feature is also
included to protect the external MOSFET in case of over-
heating.
The MAX5900/MAX5901 offer latched or autoretry fault
management and are available with 200mV, 300mV, or
400mV circuit breaker thresholds. Both the MAX5900 and
MAX5901 are available in small SOT23 packages, and
are specified for the extended -40°C to +85°C tempera-
ture range. For specific ordering information see the
Selector Guide at the end of the data sheet.
_________________________Applications
o Re^Tq^eu^lei^cre^os^mN^LoⁱⁿE^ex^Cte^arn^da^sl Sense R^Ne^es^ti^ws^oto^rkr ^Switches
Network Routers
Servers
Base-Station Line
Cards
Typical Operating Circuits
BACKPLANE CIRCUIT CARD
GND
HOT-SWAP CONTROLLER
MAX5900
GND PGOOD
ON/OFF DRAIN
VEE
GATE
-48V
FUSE
IRF540NS
50W ISOLATED
POWER SUPPLY
V1+
LUCENT
JWO50A1
ON/OFF
V1-
Features
o Wide -9V to -100V Operation
o Requires No External Sense Resistor
o Drives External N-Channel MOSFET
o Limits Inrush Current
o Circuit Breaker Function
o Less than 1mA Quiescent Current
o ON/OFF Input Permits Load Power-Supply
Control and Sequencing
o Adjustable Undervoltage Lockout
o Power-Good Output with 100V Rating
o Latching or Automatic Retry Fault Management
o Thermal Shutdown Helps Protect the External
MOSFET
o Space-Saving 6-Pin SOT23 Package
Ordering Information
PART
TEMP RANGE PIN-PACKAGE
MAX5900_ _EUT-T*
MAX5901_ _EUT-T*
-40°C to +85°C
-40°C to +85°C
6 SOT23-6
6 SOT23-6
*For specific part numbers, see Selector Guide at end of data
sheet.
Pin Configuration
TOP VIEW
V_EE 1
6 ON/OFF
MAX5900
DRAIN 2 _MAX5901 5 PGOOD (PGOOD)
GATE 3
4 GND
SOT23-6
( ) ARE FOR MAX5901 ONLY.
Typical Operating Circuits 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.