MAX34461EVKIT# Maxim Integrated, MAX34461EVKIT# Datasheet - Page 54

• Manufacturer Part Number: MAX34461EVKIT#
• Description: Power Management IC Development Tools MAX34461 Eval Kit
• Manufacturer: Maxim Integrated
• Type: Voltage Detectorsr

Specifications of MAX34461EVKIT#

• Rohs: yes
• Product: Evaluation Kits
• Tool Is For Evaluation Of: MAX34461
• Input Voltage: 3 V to 3.6 V
• Output Voltage: 3 V to 3.6 V
• Interface Type: USB
• Part # Aliases: 90-34461#EVK

The device detects two possible margining faults. First,
if the initial DAC step causes V
get value (either high or low depending on whether
the device has been instructed to margin high or low,
respectively), this creates a fault. Second, if the target
value cannot be reached when the DAC reaches full
scale, this also creates a fault. If either margining fault
occurs, the device continues attempting to margin the
power supply and does the following:
1) Sets the MARGIN bit in STATUS_WORD.
2) Sets the MARGIN_FAULT bit in STATUS_MFR_
3) Notifies the host through ALERT assertion (if enabled
If a communication error occurs between the device and
the external DS4424, a fault occurs when the device
attempts to set the DAC to full scale and the target
margin value is not reached.
The external components needed to realize the margin-
ing circuitry for the current DAC outputs are shown in
Figure 8
where IFB is the feedback node current.
Example:
Maxim Integrated
Figure 8. DAC Margining Circuit
PMBus 16-Channel Voltage Monitor and Sequencer
SPECIFIC (PAGES 0–15).
in MFR_MODE).
IFB = 500FA, margining range = Q15%
DAC “RFS” value = (7.75)/(500FA x 15%) = 103kI
Note: 40kI < RFS < 160kI
DAC “RFS” = (7.75)/(IFB x Margining Range)
POWER SUPPLY
and described in the formulas below:
FB/TRIM
V
DAC Margining Component Selection
OUT
I
FB
R
FS
OUT
OUT
FS
to exceed the tar-
Margining Faults
DS4424
The device can monitor up to five different temperature
sensors, four external sensors, plus its own internal tem-
perature sensor. The external temperature sensors are all
connected in parallel to the master I
MSCL pins). The device can support up to four DS75LV
devices.
Each of the enabled temperature sensors are measured
once per second. The internal temperature sensor is
averaged four times to reduce the effect of noise. Each
time the device attempts to read a temperature sensor,
it checks for faults. For the internal temperature sensor,
a fault is defined as reading greater than +130NC or less
than -60NC. For the I
defined as a communication access failure. Temperature-
sensor faults are reported by setting the temperature
reading to 7FFFh. A temperature-sensor fault results in
the setting of the TEMPERATURE bit in STATUS_WORD
and ALERT is asserted (if enabled in MFR_MODE). No
bits are set in STATUS_TEMPERATURE. On reset of
the device, if it cannot initialize the external DS75LV
device, the TEMPERATURE bit in STATUS_WORD is set
and ALERT is asserted (if enabled in MFR_MODE), but
the device does not attempt to reinitialize the DS75LV
until 8000h is written to MFR_TEMP_SENSOR_CONFIG.
Reading disabled temperature sensors returns a fixed
value of 0000h.
Up to four DS75LV digital temperature sensors can be
controlled by the device. The A0–A2 pins on the DS75LV
should be configured as shown in
stat function on the DS75LV is not used and hence the
O.S. output should be left open circuit.
Table 32. DS75LV Address Pin
Configuration
PAGE
17
18
19
20
21
MAX34461 internal
DS75LV (address 90h)
DS75LV (address 92h)
DS75LV (address 94h)
DS75LV (address 96h)
TEMP SENSOR
MAX34461
Temperature-Sensor Operation
2
C temperature sensors, a fault is
MAX34461
PIN CONFIGURATION
Table
A2
DS75LV ADDRESS
—
0
0
0
0
2
C port (MSDA and
32. The thermo-
A1
—
0
0
1
1
A0
—
0
1
0
1
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