MAX8688ALETG+ Maxim Integrated Products, MAX8688ALETG+ Datasheet - Page 29

• 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

3) Responds as specified by IOUT_OC_FAULT_
4) Notifies the host using FLT assertion.
The IOUT_OC_WARN_LIMIT command sets the value of
the output current, in amperes, measured across ISN+
and ISN- that causes an output overcurrent warning.
The 2 data bytes are in DIRECT format. Valid values are
the same as the IOUT_OC_FAULT_LIMIT.
The default IOUT_OC_WARN_LIMIT value is 00h.
In response to the IOUT_OC_WARN_LIMIT being
exceeded, the MAX8688:
1) Sets the OTHER bit in the STATUS_BYTE.
2) Sets
3) Notifies the host using FLT assertion.
The OT_FAULT_LIMIT command sets the temperature,
in degrees Celsius, of the on-chip temperature sensor
at which an overtemperature fault is detected.
The 2 data bytes are in DIRECT format. Valid values are
from -142.5°C to +395.4°C.
The default OT_FAULT_LIMIT value is 00h.
In response to the OT_FAULT_LIMIT being exceeded,
the MAX8688:
• Sets the TEMPERATURE bit in the STATUS_BYTE.
• Sets the OT_FAULT bit in the MFR_FAULT_STATUS
• Responds as specified by OT_FAULT_RESPONSE
• Notifies the host using FLT assertion.
The OT_WARN_LIMIT command sets the temperature,
in degrees Celsius, of the on-chip temperature sensor
at which an overtemperature warning is detected.
The 2 data bytes are in DIRECT format. Valid values are
the same as the OT_FAULT_LIMIT.
The default OT_WARN_LIMIT value is 00h.
In response to the OT_WARN_LIMIT being exceeded,
the MAX8688:
• Sets the TEMPERATURE bit in the STATUS_BYTE.
• Sets the OT_WARN bit in the MFR_FAULT_STATUS
• Notifies the host through FLT using assertion.
RESPONSE bits in the MFR_FAULT_RESPONSE
register.
MFR_FAULT_STATUS register.
register.
bits in the MFR_FAULT_RESPONSE register.
register.
the
IOUT_OC_WARN
______________________________________________________________________________________
IOUT_OC_WARN_LIMIT (4Ah)
Digital Power-Supply Controller/Monitor
OT_FAULT_LIMIT (4Fh)
OT_WARN_LIMIT (51h)
bit
in
the
TON_DELAY sets the time, in milliseconds, from when a
start condition is received (a valid OPERATION com-
mand or through A3/ONOFF when enabled) until the
POL output voltage starts to rise. During TON_DELAY,
the POL is disabled (ENOUT deasserted) until
TON_DELAY expires. Also, the undervoltage fault and
warning are masked off during TON_DELAY.
The 2 data bytes are in DIRECT format. Valid values are
from 0 to 3276.7ms.
The default TON_DELAY value is 0ms.
The TON_RISE sets the time, in milliseconds, from
when the POL output voltage starts to rise until the volt-
age has entered the regulation band. During
TON_RISE, the voltage, current, and temperature-relat-
ed faults and warnings are masked off. Meanwhile, the
MAX8688 still responds to the PMBus command. If a
TON_RISE parameter results in the DAC outputting an
out-of-range value (valid range 0 to 4090) immediately
during TON_RISE, the CML flag is set and FLT asserts
to issue a warning.
In feedback mode, the MAX8688 leaves the S1 switch
on the DAC open during soft-start. It waits for the
TON_RISE time to expire before adjusting the DAC out-
put to equal the DACOUT feedback and then closes S1.
The 2 data bytes are in DIRECT format. In REFIN mode,
the TON_RISE parameter is a 16-bit value and the valid
values are from 0.01ms to 32.767ms. In FB mode, the
TON_RISE is a 14-bit value and the valid values are
from 0.01ms to 16.383ms (the upper 2 bits are
ignored).
The default TON_RISE value is 0.01ms. Setting any
value less than this minimum value defaults back to
0.01ms.
The TOFF_DELAY sets the time, in milliseconds, from
when a STOP condition is received (a soft-off OPERATION
command or through A3/ONOFF when enabled) until the
POL stops transferring energy to the output.
When commanded to turn off immediately through the
OPERATION command, the TOFF_DELAY value is
ignored. When commanded to turn off through
A3/ONOFF (when enabled), the TOFF_DELAY parame-
ter is used.
The 2 data bytes are in DIRECT format. Valid values are
from 0 to 3276.7ms.
The default TOFF_DELAY value is 0ms.
with PMBus Interface
TOFF_DELAY (64h)
TON_DELAY (60h)
TON_RISE (61h)
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