MAX8688ALETG+ Maxim Integrated Products, MAX8688ALETG+ Datasheet - Page 30

• 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

Digital Power-Supply Controller/Monitor
with PMBus Interface
The TOFF_FALL command sets the time, in millisec-
onds, from the end of the turn-off delay time until the
output voltage is commanded to zero. Note that this
command can only be used with a device whose out-
put can sink enough current to cause the output volt-
age to decrease at a controlled rate.
When commanded to turn off immediately through the
OPERATION command, the TOFF_FALL value is
ignored. When commanded to turn off through the
OPERATION soft-off command or A3/ONOFF (when
enabled), the TOFF_FALL parameter is used. If a
TOFF_FALL parameter results in the DAC outputting an
out-of-range value (valid range 0 to 4090) immediately
during TOFF_FALL, the CML flag is set and FLT asserts
to issue a warning.
In feedback mode, this value is not used. The
MAX8688 disables ENOUT and opens the DAC switch
immediately after the TOFF_DELAY.
The 2 data bytes are in DIRECT format. Valid values are
from 0.01ms to 32.767ms.
The default TOFF_FALL value is 0.01ms. Setting any
value less than this minimum value defaults back to
0.01ms.
The STATUS_BYTE command returns 1 byte of informa-
tion with a summary of the most critical faults. In the
MAX8688, status information is binary. A value of 1 indi-
cates that a fault or warning has occurred and a 0 indi-
cates otherwise. Bits for unsupported features shall be
reported as 0.
Table 6. STATUS_BYTE Message Contents
30
BIT NUMBER
______________________________________________________________________________________
7
6
5
4
3
2
1
0
STATUS BIT NAME
TEMPERATURE
VOUT_OV
IOUT_OC
VIN_UV
OTHER
BUSY
CML
OFF
STATUS_BYTE (78h)
TOFF_FALL (65h)
A fault was declared because the device was busy and unable to respond.
(The MAX8688 does not support the BUSY bit. This bit always returns 0).
This bit is asserted if ENOUT is presently disabling the POL, regardless of the reason,
including simply not being enabled.
An output overvoltage fault has occurred.
An output overcurrent fault has occurred.
An input undervoltage fault has occurred.
(The MAX8688 does not support the VIN_UV bit. This bit always returns 0).
A temperature fault or warning has occurred.
A communication, memory, or logic fault has occurred.
A fault or warning not listed in bits [7:1] has occurred. See the MFR_FAULT_STATUS
(D8h) section for more information.
The
RESTORE_DEFAULT_ALL command. The STATUS_BYTE
message content is described in Table 6.
This command is read only.
The default STATUS_BYTE value is 40h (POL is off).
The READ_VOUT command returns the actual mea-
sured (not commanded) output voltage across RS+
and RS-. If filter mode is enabled, the filtered value is
returned.
The 2 data bytes are in DIRECT format. Valid values are
the same as VOUT_COMMAND.
The default READ_VOUT value is 00h.
The READ_IOUT command returns the measured out-
put current in amperes across ISN+ and ISN-.
The 2 data bytes are in DIRECT format. Valid values are
the same as IOUT_OC_FAULT_LIMIT.
The default READ_IOUT value is 00h.
The MAX8688 supports only one temperature reading,
READ_TEMPERATURE_1. The MAX8688 returns the
actual on-chip measured temperature in degrees
Celsius.
The 2 data bytes are in DIRECT format. Valid values are
the same as OT_FAULT_LIMIT.
The default READ_TEMPERATURE_1 value is 00h.
STATUS_BYTE
MEANING
READ_TEMPERATURE_1 (8Dh)
cannot
READ_VOUT (8Bh)
READ_IOUT (8Ch)
be
restored
by