MAX5903

Terminal Voltage (with respect to GND unless otherwise noted)
VS, DRAIN, PGOOD, PGOOD...................................-0.3V to +76V
ON/OFF ..................................................................-0.3V to +4V
GATE to V_S ...........................................................-12V to +0.3V
Current into any Pin ........................................................±3mA
Continuous Power Dissipation at T_A = +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.

The MAX5902/MAX5903 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 +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/OFF control input and a power-good status output, 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 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 temperature range. For specific ordering information refer to the selector guide at the end of the data sheet.