MAX5978
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MAX5978

0 to 16V, Hot-Swap Controller with 10-Bit Current, Voltage Monitor, and 4 LED Drivers

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Industry's First Hot-Swap Controller Operates Down to 0V and Integrates a Voltage and Current Monitor

Info: : PRODUCTION tooltip
Info: : PRODUCTION tooltip
Part Details
Part Models 2
1ku List Price Starting From $6.10
Features
  • Hot-Swap Controller Operates from 0 to 16V
  • 10-Bit ADC Monitors Load Voltage and Current
  • Circular Buffers Store 5ms of Current and Voltage Measurements
  • Internal Charge Pump Generates n-Channel MOSFET Gate Drive
  • Internal 500mA Gate Pulldown Current for Fast Shutdown
  • VariableSpeed/Bilevel™ Circuit-Breaker Protection
  • Precision-Voltage Enable Input
  • Alert Output Indicates Fault and Warning Conditions
  • Open-Drain Power-Good Output with Programmable Polarity
  • Open-Drain Fault Output
  • Four Open-Drain General-Purpose Outputs Sink 25mA to Directly Drive LEDs
  • Programmable LED Flashing Function
  • Latched-Off Fault Management
  • 400kHz I²C Interface
  • Small, 5mm x 5mm, 32-Pin TQFN-EP Package
Additional Details
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The MAX5978 hot-swap controller provides complete protection for systems with a supply voltage from 0 to 16V. The device includes four programmable LED outputs.

The IC provides two programmable levels of overcurrent circuit-breaker protection: a fast-trip threshold for a fast turn-off, and a lower slow-trip threshold for a delayed turn-off. The maximum overcurrent circuit-breaker threshold range is set with a trilevel logic input (IRNG), or by programming through the I²C interface.

The IC is an advanced hot-swap controller that monitors voltage and current with an internal 10-bit ADC, which is continuously multiplexed to convert the output voltage and current at 10ksps. Each 10-bit sample is stored in an internal circular buffer so that 50 past samples of each signal can be read back through the I²C interface at any time or after a fault condition.

The device includes five user-programmable digital comparators to implement overcurrent warning and two levels of overvoltage/undervoltage detection. When measured values violate the programmable limits, an external active-low ALERT output is asserted. In addition to the active-low ALERT signal, the IC can be programmed to deassert the power-good signal and/or turn off the external MOSFET.

The IC features four I/Os that can be independently configured as general-purpose input/outputs (GPIOs) or as open-drain LED drivers with programmable blinking. These four I/Os can be configured for any mix of LED driver or GPIO function.

The device is available in a 32-pin thin QFN-EP package and operates over the -40°C to +85°C extended temperature range.

Applications

  • Blade Servers
  • DC Power Metering
  • Disk Drives/DASD/Storage Systems
  • Network Switches/Routers
  • Soft-Switch for ASICs, FPGAs, and Microcontrollers
Part Models 2
1ku List Price Starting From $6.10

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Jun 20, 2016

- 1612

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