MAX16048ACB+ Maxim Integrated Products, MAX16048ACB+ Datasheet - Page 59

• Manufacturer Part Number: MAX16048ACB+
• Description: IC EE-PROG SYS MGR 8CH 64-TQFP
• Manufacturer: Maxim Integrated Products
• Type: System Managerr

Specifications of MAX16048ACB+

• Number Of Voltages Monitored: 8
• Output: Open Drain, Push-Pull
• Reset: Active Low
• Reset Timeout: Adjustable/Selectable
• Voltage - Threshold: Adjustable/Selectable
• Operating Temperature: -40°C ~ 125°C
• Mounting Type: Surface Mount
• Package / Case: 64-TQFP Exposed Pad, 64-eTQFP, 64-HTQFP, 64-VQFP
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

LOAD ADDRESS: This is an extension to the standard
IEEE 1149.1 instruction set to support access to the
memory in the MAX16046A/MAX16048A. When the
LOAD ADDRESS instruction latches into the instruction
register, TDI connects to TDO through the 8-bit memory
address test data register during the shift-DR state.
READ DATA: This is an extension to the standard IEEE
1149.1 instruction set to support access to the memory
in the MAX16046A/MAX16048A. When the READ DATA
instruction latches into the instruction register, TDI con-
nects to TDO through the 8-bit memory read test data
register during the shift-DR state.
WRITE DATA: This is an extension to the standard
IEEE 1149.1 instruction set to support access to the
memory in the MAX16046A/MAX16048A. When the
WRITE DATA instruction latches into the instruction reg-
ister, TDI connects to TDO through the 8-bit memory
write test data register during the shift-DR state.
REBOOT: This is an extension to the standard IEEE
1149.1 instruction set to initiate a software controlled
reset to the MAX16046A/MAX16048A. When the
REBOOT instruction latches into the instruction register,
the MAX16046A/MAX16048A resets and immediately
begins the boot-up sequence.
SAVE: This is an extension to the standard IEEE 1149.1
instruction set that triggers a fault log. The current ADC
conversion results along with fault information are
saved to EEPROM depending on the configuration of
the Critical Fault Log Control register (r47h).
SETEXTRAM: This is an extension to the standard IEEE
1149.1 instruction set that allows access to the extended
page. Extended registers include ADC conversion
results, DACOUT enables, and GPIO input/output data.
RSTEXTRAM: This is an extension to the standard IEEE
1149.1 instruction set. Use RSTEXTRAM to return to the
default page and disable access to the extended page.
SETEEPADD: This is an extension to the standard
IEEE 1149.1 instruction set that allows access to the
EEPROM page. Once the SETEEPADD command has
been sent, all addresses are recognized as EEPROM
addresses only. User EEPROM (r9Ch to rFFh) cannot
be accessed from the JTAG interface. Use the SMBus
interface to access user EEPROM.
RSTEEPADD: This is an extension to the standard IEEE
1149.1 instruction set. Use RSTEEPADD to return to the
default page and disable access to the EEPROM.
When the EEPROM has not been programmed using
the JTAG or I
System Managers with Nonvolatile Fault Registers
12-Channel/8-Channel EEPROM-Programmable
Unprogrammed Device Behavior
2
C interface, the default configuration of
Applications Information
______________________________________________________________________________________
the EN_OUT_ outputs is open-drain active-low. If it is
necessary to hold an EN_OUT_ high or low to prevent
premature startup of a power supply before the
EEPROM is programmed, connect a resistor to ground
or the supply voltage. Avoid connecting a resistor to
ground if the output is to be configured as open-drain
with a separate pullup resistor.
When V
impedance until V
driven low. All other outputs are high impedance until
V
copied into register memory, and after which the out-
puts assume their programmed states. If EN is driven by
external logic instead of from the center tap of a V
connected resistive divider, ensure that an active-high
pulse occurs on EN within 1.5ms of V
2.85V. If the external driving logic is in the high-imped-
ance state during power-up, this pulse can be created
by connecting an external pullup resistor to EN.
The MAX16046A/MAX16048A can margin or shift the
voltages on external power supplies to facilitate proto-
typing or manufacturing tests. There are several differ-
ent ways to margin power supplies: One method feeds
a current into the feedback node of a DC-DC converter
or LDO, and another method feeds a current into the
trim input on a DC-DC module.
See Figure 15 for the connections of the MAX16046A/
MAX16048A to a power supply using the feedback
node method. The output voltage, V
lated using the following formula:
where V
power supply and V
the MAX16046A/MAX16048A DACOUT_ output.
Select R
with no trim in effect (V
range bits such that V
within the DACOUT_ output range (see the DAC
Outputs section). The resistor R
control that the DACOUT_ voltage has on the output
voltage of the power supply. Large values of R
spond to a higher degree of resolution control over the
output voltage, and small values of R
lesser degree of resolution control.
CC
reaches 2.85V, when the EEPROM contents are
V
OUT
CC
1
REF
and R
is ramped from 0V, the RESET output is high
=
V
is the internal reference voltage of the
REF
2
Device Behavior at Power-Up
CC
to obtain the desired output voltage
⎛
⎜
⎜
⎝
1
DACOUT_
+
reaches 1.4V, at which point it is
Margining Power Supplies
REF
R
R
DACOUT_
3
1
+
falls approximately halfway
R
R
2
1
is the output voltage of
⎞
⎟
⎟
⎠
3
= V
−
varies the amount of
R
R
OUT
Feedback Method
REF
1
3
3
V
correspond to a
, can be calcu-
DACOUT_
CC
). Set the DAC
exceeding
3
corre-
CC
59
-