MAX5947A/B/C

Pin- and Function-Compatible with the LT1641-2 (MAX5947B)
Provides Safe Hot Swap for +9V to +80V Power- Supply Range (MAX5947A/B/C)
Safe Board Insertion and Removal from Live Backplanes
Latched/Autoretry Management
 Active-Low or Active-High Power-Good Output
Programmable Foldback Current Limiting
High-Side Drive for an External N-Channel MOSFET
Built-In Thermal Shutdown
Undervoltage Lockout (UVLO)
Overvoltage Protection
User-Programmable Supply Voltage Power-Up Rate

Hot Board Insertion Electronic Circuit Breakers Industrial High-Side Switch/Circuit Breakers Network Routers and Switches 24V/48V Industrial/Alarm Systems

(Voltages Referenced to GND)
VCC.........................................................................-0.3V to +85V
SENSE, FB, ON ............................................-0.3V to (VCC + 0.3V)
TIMER, PWRGD, PWRGD...........................................-0.3V to +85V
GATE .......................................................................-0.3V to +95V
Maximum GATE Current ....................................-....50mA, +150mA
Maximum Current into Any Other Pin..................................±50mA
Continuous Power Dissipation (TA = +70)
8-Pin SO (derate 5.9mW/ above +70)...........................470mW
Operating Temperature Range ..................................-40to +85
Maximum Junction Temperature ...........................................+150
Storage Temperature Range .............................-......60 to +150
Lead Temperature (soldering, 10s) .......................................+300
ESD Rating (Human Body Model)..............................................2000V

The MAX5933AMAX5933F/MAX5947A/B/C fully integrated hot-swap controllers for +9V to +80V positive supply rails (MAX5947A/B/C), allow for the safe insertion and removal of circuit cards into live backplanes without causing glitches on the backplane power-supply rail. The MAX5947B is pin- and function-compatible with the LT1641-2. The other devices offer added features such as a choice of active-high or active-low power-good outputs (PWRGD/PWRGD), latched/autoretry fault management, and autoretry duty-cycle options of 3.75% or 0.94% (see the Selector Guide).

The MAX5933AMAX5933F are available with a default undervoltage lockout threshold of +31V and operate over a supply voltage range of +33V to +80V. The MAX5947A/B/C are available with a default undervoltage of +8.3V. All devices feature a programmable analog foldback current limit. If the device remains in current limit for more than a programmable time, the external n-channel MOSFET is either latched off (MAX5933A/ MAX5933C/MAX5947A) or is set to automatically restart after a timeout delay (MAX5933B/MAX5933D/MAX5933E/ MAX5933F/MAX5947B/MAX5947C).

The MAX5947A/B/C operates in the extended temperature range of -40 to +85. These devices are available in an 8-pin SO package.