MAX5970ETX+ Maxim Integrated Products, MAX5970ETX+ Datasheet - Page 18

• Manufacturer Part Number: MAX5970ETX+
• Description: IC CTLR HOT-SWAP DUAL 36TQFN
• Manufacturer: Maxim Integrated Products
• Type: Hot-Swap Controllerr

Specifications of MAX5970ETX+

• Applications: General Purpose, PCI Express
• Internal Switch(s): No
• Voltage - Supply: 2.7 V ~ 16 V
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: 36-WFQFN Exposed Pad
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

0V to 16V, Dual Hot-Swap Controller with 10-Bit
Current and Voltage Monitor and 4 LED Drivers
The MAX5970 provides a great deal of system flexibil-
ity because the current-sense range, DAC setting, and
threshold ratio can be changed on the fly for systems
that must protect a wide range of interchangeable
load devices, or for systems that control the allocation
of power to smart loads. Table 6 shows the specified
Table 6. Specified Current-Sense and Circuit-Breaker Threshold Ranges
Table 7a. IRNG Inputs Status Register Format
Table 7b. Setting Current-Sense Range
18
Description:
Register Title:
Register Address:
IRNG_ INPUT
Unconnected
bit 7
_____________________________________________________________________________________
IRNG_ PIN STATE
—
High
Low
Open
High
Low
bit 6
OUTPUT RANGE (mV)
—
FAST-TRIP DAC
40 to 100
10 to 25
20 to 50
Fast-trip threshold maximum range setting bits, from IRNG_ three-state inputs
Status 2
0x33
bit 5
—
Chx_IRNG1
1
0
0
bit 4
—
GAIN (2-BIT) (V
(DEFAULT = 11)
ifast2slow
00 (125%)
01 (150%)
10 (175%)
11 (200%)
00 (125%)
01 (150%)
10 (175%)
11 (200%)
00 (125%)
01 (150%)
10 (175%)
11 (200%)
IRNG1
CH1_
R/W
bit 3
ranges for the fast-trip and slow-trip thresholds for all
combinations of current-sense range and threshold ratio.
When an overcurrent event causes the MAX5970 to shut
down a channel, a corresponding open-drain FAULT_
output alerts the system. Figure 2 shows the operation
and fault-management flowchart for one
MAX5970.
FAST
Chx_IRNG0
/V
SLOW
0
1
0
IRNG0
CH1_
R/W
bit 2
)
SLOW-TRIP THRESHOLD RANGE
IRNG1
CH0_
R/W
bit 1
MAXIMUM CURRENT-SENSE
16.00 to 40.00
13.33 to 33.33
11.48 to 28.57
10.00 to 25.00
32.00 to 80.00
26.67 to 66.67
22.86 to 57.14
20.00 to 50.00
8.00 to 20.00
6.67 to 16.67
5.71 to 14.29
5.00 to 12.50
SIGNAL (mV)
(mV)
IRNG0
CH0_
R/W
bit 0
100
25
50
channel of the
RESET
VALUE
—