MAX5970EVKIT+【PDF 1/41 页】EVAL KIT MAX5970

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EVALUA

AVAILAB

19-5128; Rev 0; 1/10

TION KIT

0V to 16V, Dual Hot-Swap Controller with 10-Bit

Current and Voltage Monitor and 4 LED Drivers

General Description

The MAX5970 dual hot-swap controller provides com-

plete protection for systems with two supply voltages

from 0V to +16V. The MAX5970 includes four program-

mable LED outputs. The two hot-swap channels can be

configured to operate as independent hot-swap control-

lers, or as a pair operating together so that both chan-

nels shut down if either channel experiences a fault.

The MAX5970 provides two programmable levels of

overcurrent circuit-breaker protection: a fast-trip thresh-

old 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 program-

ming though the I 2 C 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 circu-

lar buffer so that 50 past samples of each signal can be

read back through the I 2 C interface at any time or after

a fault condition.

The device includes five user-programmable digital

comparators per hot-swap channel to implement over-

current warning and two levels of overvoltage/undervolt-

age detection. When any of the measured values violates

the programmable limits, an external ALERT output is

asserted. In addition to the 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 indepen-

dently configured as general-purpose inputs/outputs

(GPIOs) or as open-drain LED drivers with program-

mable 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 pack-

Features

S Two Independent Hot-Swap Controllers Operate

from 0V to +16V

S 10-Bit ADC Monitors Voltage and Current of Each

Channel

S Circular Buffers Store 5ms of Current and Voltage

Measurements

S Two Independent Internal Charge Pumps

Generate n-Channel MOSFET Gate Drives

S Internal 500mA Gate Pulldown Current for Fast

Shutdown

S VariableSpeed/BiLevel? Circuit-Breaker

Protection

S Independent Precision-Voltage Enable Inputs

S Alert Output Indicates Fault and Warning

Conditions

S Independent Power-Good Outputs

S Independent Fault Outputs

S Four Open-Drain Outputs Sink 25mA to Directly

Drive LEDs

S Programmable LED Flashing Function

S Autoretry or Latched Fault Management

S 400kHz I 2 C Interface

S Small 6mm x 6mm, 36-Pin TQFN-EP Package

Applications

Single PCI Express M Hot-Plug Slot

Blade Servers

Disk Drives/DASD/Storage Systems

Soft-Switch for ASICs, FPGAs, and Microcontrollers

with Independent Core and I/O Voltages

Ordering Information

age and operates over the -40 N C to +85 N C extended

temperature range.

PART

MAX5970ETX+

TEMP RANGE

-40 N C to +85 N C

PIN-PACKAGE

36 TQFN-EP*

+ Denotes a lead(Pb)-free/RoHS-compliant package.

* EP = Exposed pad.

VariableSpeed/BiLevel is a trademark of Maxim Integrated Products, Inc.

PCI Express is a registered trademark of PCI-SIG Corp.

_______________________________________________________________ Maxim Integrated Products 1

For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642,

or visit Maxim’s website at www.maxim-ic.com.

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