Rainbow Electronics MAX5970 - Manual

_______________________________________________________________ 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.
0V to 16V, Dual Hot-Swap Controller with 10-Bit
Current and Voltage Monitor and 4 LED Drivers MAX5970
19-5128; Rev 0; 1/10
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-
age and operates over the -40NC to +85NC extended
temperature range.
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
VariableSpeed/BiLevel is a trademark of Maxim Integrated Products, Inc.
PCI Express is a registered trademark of PCI-SIG Corp.
+Denotes a lead(Pb)-free/RoHS-compliant package.
*EP = Exposed pad.
EVALUATION KIT
AVAILABLE
PART TEMP RANGE PIN-PACKAGE
MAX5970ETX+ -40NC to +85NC 36 TQFN-EP*