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MAX5948A：-48V Hot-Swap Controllers with External RSENSE

The MAX5948A/MAX5948B are hot-swap controllers that allow a circuit card to be safely hot plugged into a live backplane. The MAX5948A/MAX5948B operate from -20V to -80V and are well-suited for -48V power systems. The MAX5948A is pin- and function-compatible with both the LT1640AL and LT1640L. The MAX5948B is pin- and function-compatible with both the LT1640AH and LT1640H. The MAX5948A/MAX5948B provide a controlled turn-on to circuit cards preventing glitches on the power-supply rail and damage to board connectors and components. The MAX5948A/MAX5948B provide undervoltage, overvoltage, and overcurrent protection. These devices ensure the input voltage is stable and within tolerance before applying power to the load. Both the MAX5948A and MAX5948B protect a system against overcurrent and short-circuit conditions by turning off the external MOSFET in the event of a fault condition. Both devices feature an open-drain power-good status output, active-low PWRGD for MAX5948A or PWRGD for MAX5948B, that can be used to enable downstream converters. The MAX5948A/MAX5948B are available in an 8-pin SO package. Both devices are specified for the extended -40°C to +85°C temperature range.

Key Features Allow Safe Board Insertion and Removal from a Live -48V Backplane Pin- and Function-Compatible with LT1640AL/LT1640L (MAX5948A) Pin- and Function-Compatible with LT1640AH/LT1640H (MAX5948B) Withstand -100V Input Transients with No External Components Operate from -20V to -80V Programmable Inrush and Short-Circuit Current Limits Programmable Overvoltage Protection Programmable Undervoltage Lockout Power Up into a Shorted Load Power-Good Control Output

MAX5948A, MAX5948B: Block Diagram Applications/Uses Base-Station Line Cards Central-Office Switching Network Routers and Switches Server Line Cards

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Related Products

• MAX5921：-48V Hot-Swap Controllers with External RSENSE and High Gate Pulldown Current
• MAX5939：-48V Hot-Swap Controllers with External RSENSE and High Gate Pulldown Current
• MAX5920：-48V Hot-Swap Controller with External RSENSE

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