Features: · Wide -9V to -100V Operation
· Requires No External Sense Resistor
· Drives External N-Channel MOSFET
· Limits Inrush Current
· Circuit Breaker Function
· Less than 1mA Quiescent Current
· ON/OFF Input Permits Load Power-Supply Control and Sequencing
· Adjustable Undervoltage Lockout
· Power-Good Output with 100V Rating
· Latching or Automatic Retry Fault Management
· Thermal Shutdown Helps Protect the External MOSFET
· Space-Saving 6-Pin SOT23 PackageApplication·Requires No External Sense Resistor
·Telecom Line Cards
·Network Routers
·Base-Station Line
·Cards
·Network Switches
·ServersPinout
SpecificationsTerminal Voltage (with respect to GND, unless otherwise noted)
VEE, DRAIN, PGOOD, PGOOD ...............................-120V to +0.3V
ON/OFF to VEE .........................................................-0.3V to +4V
GATE to VEE .......................................................... -0.3V to +12V
Current into Any Pin...........................................................±3mA
Continuous Power Dissipation (TA = +70°C)
6-Pin SOT23 (derate 9.1mW/°C above +70°C).............727mW
Maximum Junction Temperature ....................................+150°C
Storage Temperature Range ........................ -60°C to +150°C
Lead Temperature..........................................................(Note 1)
Note 1: This device is constructed using a unique set of packaging techniques that impose a limit on the thermal profile the device can be exposed to during board level solder attach and rework. This limit permits only the use of solder profiles recommended in the industry standard specification, JEDEC 020A, paragraph 7.6, Table 3 for IR/VPR and convection reflow. Preheating is required. Hand or wave soldering is not allowed.
DescriptionThe 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 current by gradually turning on the external MOSFET. Once the external MOSFET is fully enhanced, the circuit breaker function is enabled and the MAX5900/MAX5901 provide overcurrent protection by monitoring the voltage drop across the external MOSFET's on-resistance.
The MAX5900/MAX5901 include an undervoltage lockout (UVLO) function, ON/OFF control input, and a powergood status output, PGOOD (MAX5900) or PGOOD (MAX5901). A built-in thermal shutdown feature is also included to protect the external MOSFET in case of overheating.
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 temperature range. For specific ordering information see the Selector Guide at the end of the data sheet.
MAX5900 Data Sheet
