MAX5970

PRODUCTION

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

Data Sheet (Rev. 0) Product Selection Table

Part Models: 2
1ku List Price: price unavailable

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Overview

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

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.

Applications

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

Part Models: 2
1ku List Price: price unavailable

Documentation

Data Sheet 1

MAX5970: 0V to 16V, Dual Hot-Swap Controller with 10-Bit Current and Voltage Monitor and 4 LED Drivers Data Sheet (Rev.0) 02/23/2010

Technical Articles 2

Oscilloscope Math Functions Aid Hot-Swap Circuit Analysis 11/03/2011

The Art of Hot-Swapping in Telecom Systems: Avoid a Patchwork and Implement a More Effective Solution 09/20/2010

ADI has always placed the highest emphasis on delivering products that meet the maximum levels of quality and reliability. We achieve this by incorporating quality and reliability checks in every scope of product and process design, and in the manufacturing process as well. "Zero defects" for shipped products is always our goal. View our quality and reliability program and certifications for more information.

Part Model	Pin/Package Drawing	Documentation	CAD Symbols, Footprints, and 3D Models
MAX5970ETX+	36-LFCSP-6X6X0.75	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
MAX5970ETX+T	36-LFCSP-6X6X0.75	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys

This is the most up-to-date revision of the Data Sheet.

Software Resources

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Tools & Simulations

Software Development 1

MAX5970 EVKIT Software, 1.0.0

Evaluation Kits

Evaluation Kit for the MAX5970

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Features and Benefits

Safely Hot Swaps Two Independent 0 to 16V Power Supplies After Power-Up
Windows 2000-, Windows XP-, and Windows Vista (32-Bit)-Compatible Software
On-Board Microcontroller to Generate I²C Commands
Easy-to-Use, Menu-Driven Software
USB-PC Connection (Cable Included)

Product Details

The MAX5970 evaluation kit (EV kit) is an assembled and tested PCB used to evaluate the MAX5970 dual hot-swap controller, which provides protection for systems with two supply voltages between 0 and 16V. The on-board microcontroller, which is connected to the PC through the universal serial bus (USB) port, acts as the I²C master.

The EV kit also includes Windows® 2000-, Windows XP®-, and Windows Vista®-compatible software that provides a simple user interface for exercising the MAX5970 features. The program is menu-driven and offers a graphical user interface (GUI) complete with control buttons and status displays. The EV kit comes with the MAX5970ETX+ installed.