MAX8688ALETG+ Maxim Integrated Products, MAX8688ALETG+ Datasheet - Page 33

• Manufacturer Part Number: MAX8688ALETG+
• Description: IC PWR SUPPLY CTRLR/MONTR 24TQFN
• Manufacturer: Maxim Integrated Products

Specifications of MAX8688ALETG+

• Applications: Power Supply Controller/Monitor
• Voltage - Supply: 3 V ~ 3.6 V
• Current - Supply: 6.7mA
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: 24-TQFN Exposed Pad
• Supply Voltage (max): 3.6 V
• Supply Voltage (min): 3 V
• Operating Temperature Range: - 40 C to + 85 C
• Mounting Style: SMD/SMT
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Voltage - Input: -
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant

The MFR_VOUT_PEAK command returns the maximum
actual measured (not commanded) output voltage in
volts across RS+ and RS-. If the filter mode is enabled,
instead of returning the instantaneous value, the filtered
output voltage is returned. To reset this value to 0, write
to this command with a data value of 0. Any other val-
ues written by this command are used as a comparison
for future peak updates.
The 2 data bytes are in DIRECT format. Valid values are
the same as VOUT_COMMAND.
The default MFR_VOUT_PEAK value is 0.
The MFR_IOUT_PEAK command returns the maximum
measured output current in amperes across ISN+ and
ISN-. To reset this value to 0, write to this command with
a data value of 0. Any other values written by this com-
mand are used as a comparison for future peak updates.
The 2 data bytes are in DIRECT format. Valid values are
the same as IOUT_OC_FAULT_LIMIT.
The default MFR_IOUT_PEAK value is 00h.
The MFR_TEMPERATURE_PEAK command returns the
maximum actual on-chip measured temperature in
degrees Celsius. To reset this value to its lowest value,
write to this command with a data value of 0FFFFh. Any
other values written by this command are used as a
comparison for future peak updates.
The 2 data bytes are in DIRECT format. Valid values are
the same as OT_FAULT_LIMIT.
The default MFR_TEMPERATURE_PEAK value is 00h.
The MFR_FILTER_MODE command is used to set V
sample count and sample delays.
Table 9. MFR_FILTER_MODE Bit
Definition
BITS
15:8
7:0
Sample
Sample
NAME
Count
Delay
BIT
MFR_TEMPERATURE_PEAK (D6h)
The upper byte defines the time interval
between each sample. The sampling delay is
1.75µs + MFR_FILTER_MODE[15:8] x 250ns.
The lower byte defines the number of
samples to acquire in each monitoring
sequence. The number of samples is
determined by 2^ MFR_FILTER_MODE[7:0].
______________________________________________________________________________________
Digital Power-Supply Controller/Monitor
MFR_FILTER_MODE (D7h)
MFR_VOUT_PEAK (D4h)
MFR_IOUT_PEAK (D5h)
DESCRIPTION
OUT
Whenever filtering is enabled (MFR_FILTER_MODE[7:0]
not equal to 0), voltage-related readings are computed
as an average over the sample count. Fault and warning
limits are compared against the averaged value to
determine if a fault/warning has occurred. The Sample
Delay bit value (MFR_FILTER_MODE[15:8]) sets the
time between successive voltage readings. Note that
when filtering is disabled (MFR_FILTER_MODE[7:0] =
0), the Sample Delay bit value is ignored.
The default MFR_FILTER_MODE value is 00h (1
Sample Count bit and no delay). When filtering is in
progress, the PMBus command is ignored.
When a warning or fault condition is detected, the
MAX8688 sets the corresponding bit in the
MFR_FAULT_STATUS register to 1 and notifies the host
using FLT assertion. The STATUS_BYTE is computed
from MFR_FAULT_STATUS[7:0].
This register is cleared to 0 together with the
STATUS_BYTE register by any of the fault/warning clear-
ing methods mentioned earlier in the CLEAR_FAULTS
command.
Table 10. MFR_FAULT_STATUS Bit
Definition
with PMBus Interface
BIT
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
0
Reserved. Read returns 0.
OT_WARN
OT_FAULT
IOUT_OC_WARN
IOUT_NC_FAULT
VOUT_UV_WARN
VOUT_UV_FAULT
VOUT_OV_WARN
Reserved. Read returns 0.
OFF
VOUT_OV_FAULT
IOUT_OC_FAULT
Reserved. Read returns 0.
TEMPERATURE. Set when either OT_WARN or
OT_FAULT is set.
CML
OTHER. Set when any bit (other than those
temperature related bits) in the high byte is set.
FAULT/WARNING BIT NAME
MFR_FAULT_STATUS (D8h)
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