Part # MAX5921-MAX5939 datasheet

Part Manufacturer: Maxim


Part Description: MAX5921 DS

Part Details:

19-2946; Rev 1; 2/06 -48V Hot-Swap Controllers with External RSENSE and High Gate Pulldown Current MAX5921/MAX5939 General Description Features The MAX5921/MAX5939 hot-swap controllers allow a cir- Allows Safe Board Insertion and Removal cuit card to be safely hot plugged into a live backplane. from a Live -48V Backplane The MAX5921/MAX5939 operate from -20V to -80V andare well suited for -48V power systems. These devices Pin-Compatible with LT1640 and LT4250 are pin compatible with both the LT1640 and LT4250 and Circuit Breaker Immunity to Input Voltage Steps provide improved features over these devices. and Current Spikes The MAX5921/MAX5939 provide a controlled turn-on to 450mA GATE Pulldown Current During Short- circuit cards preventing damage to board connectors,board components, and preventing glitches on the Circuit Condition power-supply rail. The MAX5921/MAX5939 provide Exponential GATE Pulldown Current undervoltage, overvoltage, and overcurrent protection.These devices ensure that the input voltage is stable Withstands -100V Input Transients with No and within tolerance before applying power to the load. External Components Both the MAX5921 and MAX5939 protect a system Programmable Inrush and Short-Circuit Current against overcurrent and short-circuit conditions by turn- Limits ing off the external MOSFET in the event of a fault con- Operates from -20V to -80V dition. The MAX5921/MAX5939 protect against inputvoltage steps by limiting the load current to a safe level Programmable Overvoltage Protection without turning off power to the load. Programmable Undervoltage Lockout The device features an open-drain power-good status with Built-In Glitch Filter output, PWRGD or PWRGD for enabling downstreamconverters (see Selector Guide). A built-in thermal shut- Overcurrent Fault Integrator down feature is also included to protect the external Powers Up into a Shorted Load MOSFET in case of overheating. The MAX5939 featuresa latched fault output. The MAX5921 contains built-in Power-Good Control Output autoretry circuitry after a fault condition. Thermal Shutdown Protects External MOSFET The MAX5921/MAX5939 are available in an 8-pin SOpackage and operate in the extended -40°C to +85°C Ordering Information temperature range. Applications PART TEMP RANGE PIN-PACKAGE MAX5921AESA -40°C to +85°C

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MAX5921-MAX5939.pdf Datasheet