MAX16047A Datasheet, PDF (33/61 Pages) Maxim Integrated Products – 12-Channel/8-Channel EEPROM-Programmable System Managers with Nonvolatile Fault Registers

12-Channel/8-Channel EEPROM-Programmable
System Managers with Nonvolatile Fault Registers
The MAX16047A/MAX16049A include selectable internal
100Ω pulldown resistors to ensure that tracked voltages
are not held high by large external capacitors during a
fault event. The pulldowns help to ensure that monitored
INS_ voltages are fully discharged before the next
power-up cycle is initiated. These pulldowns are high
impedance during normal operation. Set r4Eh[7:4] to ‘1’
to enable the pulldown resistors (Table 12). These pull-
down resistors may also be used with EN_OUT1–
EN_OUT4 channels not configured for closed-loop track-
ing, which is useful to discharge the output capacitors of
a DC-DC converter during shutdown. For this case, con-
figure the GPIO as an INS_ input and set the 100Ω pull-
down bit, but do not enable closed-loop tracking.
Connect the INS_ input to the output of the power supply.
Table 14. Power-Good (PG) Thresholds
REGISTER/
EEPROM
ADDRESS
64h
BIT RANGE
DESCRIPTION
[1:0]
[3:2]
[5:4]
[7:6]
00 = PG is asserted when monitored V_MON1 is 95% of V_INS1
01 = PG is asserted when monitored V_MON1 is 92.5% of V_INS1
10 = PG is asserted when monitored V_MON1 is 90% of V_INS1
11 = PG is asserted when monitored V_MON1 is 87.5% of V_INS1
00 = PG is asserted when monitored V_MON2 is 95% of V_INS2
01 = PG is asserted when monitored V_MON2 is 92.5% of V_INS2
10 = PG is asserted when monitored V_MON2 is 90% of V_INS2
11 = PG is asserted when monitored V_MON2 is 87.5% of V_INS2
00 = PG is asserted when monitored V_MON3 is 95% of V_INS3
01 = PG is asserted when monitored V_MON3 is 92.5% of V_INS3
10 = PG is asserted when monitored V_MON3 is 90% of V_INS3
11 = PG is asserted when monitored V_MON3 is 87.5% of V_INS3
00 = PG is asserted when monitored V_MON4 is 95% of V_INS4
01 = PG is asserted when monitored V_MON4 is 92.5% of V_INS4
10 = PG is asserted when monitored V_MON4 is 90% of V_INS4
11 = PG is asserted when monitored V_MON4 is 87.5% of V_INS4
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