MAX5970:0V to 16V, Dual Hot-Swap Controller with 10-Bit Current and Voltage Monitor and 4 LED Drivers

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

The MAX5970 dual hot-swap controller provides complete protection for systems with two supply voltages from 0V to +16V. The MAX5970 includes four programmable LED outputs. The two hot-swap channels can be configured to operate as independent hot-swap controllers, or as a pair operating together so that both channels shut down if either channel experiences a fault. The MAX5970 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 independently for each channel with a trilevel logic input IRNG_, or by programming though the I²C interface. The MAX5970 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 of both hot-swap channels 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 per hot-swap channel to implement overcurrent warning and two levels of overvoltage/undervoltage detection. When any of the measured values violates the programmable limits, an external active-low ALERT output is asserted. In addition to the active-low ALERT signal, the MAX5970 can be programmed to deassert the power-good signal and/or turn off the external MOSFET. The MAX5970 features four I/Os that can be independently configured as general-purpose inputs/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 MAX5970 is available in a 36-pin thin QFN-EP package and operates over the -40°C to +85°C extended temperature range.

Key Features
  • Two Independent Hot-Swap Controllers Operate from 0V to +16V
  • 10-Bit ADC Monitors Voltage and Current of Each Channel
  • Circular Buffers Store 5ms of Current and Voltage Measurements
  • Two Independent Internal Charge Pumps Generate n-Channel MOSFET Gate Drives
  • Internal 500mA Gate Pulldown Current for Fast Shutdown
  • VariableSpeed/BiLevel™ Circuit-Breaker Protection
  • Independent Precision-Voltage Enable Inputs
  • Alert Output Indicates Fault and Warning Conditions
  • Independent Power-Good Outputs
  • Independent Fault Outputs
  • Four Open-Drain Outputs Sink 25mA to Directly Drive LEDs
  • Programmable LED Flashing Function
  • Autoretry or Latched Fault Management
  • 400kHz I²C Interface
  • Small 6mm x 6mm, 36-Pin TQFN-EP Package
MAX5970: Typical Application Circuit
MAX5970: Typical Application Circuit
Applications/Uses
  • Blade Servers
  • Disk Drives/DASD/Storage Systems
  • Single PCI Express® Hot-Plug Slot
  • Soft-Switch for ASICs, FPGAs, and Microcontrollers with Independent Core and I/O Voltages
DataSheet
titleDownload file
MAX5970 Data SheetMAX5970.pdf
Parametrics
Part NumberVIN
(V)
VIN
(V)
Circuit Breaker/ Current LimitCircuit Breaker/Current Limit Threshold
(mV)
Fault Condition ControlChannelsPositive/Negative RailFeaturesPackage/PinsBudgetary
Price
minmaxSee Notes
MAX59702.716Circuit Breaker25 to 100Programmable2PositiveInternal I2C ADC Measures Current and VoltageTQFN/36$6.54 @1k
Design kits & evaluation modules
Ordering Information
Part NumberStatusRecommended ReplacementPackageTempRoHS
MAX5970ETX+ActiveTQFN,;36 pin;37.2 mm²-40°C to +85°CLead Free
MAX5970ETX+TActiveTQFN,;36 pin;37.2 mm²-40°C to +85°CLead Free
MAX5970.pdf MAX5970
MAX5970.pdf MAX5970