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

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

Product Details

Key Features

Parametric specs for Hot Swap Controllers
VIN (V) (min) 2.7
VIN (V) (max) 16
# Channels 1
Circuit Breaker/ Current Limit Circuit Breaker
Circuit Breaker/Current Limit Threshold (mV) Adjustable
Fault Condition Control Programmable
Positive/Negative Rail Positive
Features Internal I2C ADC Measures Current and Voltage
VariableSpeed/BiLevel Current Limit
Package/Pins TQFN/32
Budgetary
Price (See Notes)
6.1
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Simplified Block Diagram

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Parameters

Parametric specs for Hot Swap Controllers
VIN (V) (min) 2.7
VIN (V) (max) 16
# Channels 1
Circuit Breaker/ Current Limit Circuit Breaker
Circuit Breaker/Current Limit Threshold (mV) Adjustable
Fault Condition Control Programmable
Positive/Negative Rail Positive
Features Internal I2C ADC Measures Current and Voltage
VariableSpeed/BiLevel Current Limit
Package/Pins TQFN/32
Budgetary
Price (See Notes)
6.1

Key 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

Applications/Uses

  • Blade Servers
  • DC Power Metering
  • Disk Drives/DASD/Storage Systems
  • Network Switches/Routers
  • Soft-Switch for ASICs, FPGAs, and Microcontrollers

Description

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.

Simplified Block Diagram

MAX5978: Functional Diagram MAX5978: Functional Diagram Zoom icon

Technical Docs

Support & Training

Search our knowledge base for answers to your technical questions.

Filtered Search

Our dedicated team of Applications Engineers are also available to answer your technical questions. Visit our support portal .

Sampling:
Selecting the Sample button above will redirect to the third-party ADI Sample Site. The part selected will carry over to your cart on this site once logged in. Please create a new account there if you have never used the site before. Contact SampleSupport@analog.com with any questions regarding this Sample Site.