MAX34440ETL+ Maxim Integrated Products, MAX34440ETL+ Datasheet - Page 14

• Manufacturer Part Number: MAX34440ETL+
• Description: Supervisory Circuits PMBUS 6-CH POW SUPPLY MANAGER
• Manufacturer: Maxim Integrated Products

Specifications of MAX34440ETL+

• Minimum Operating Temperature: - 40 C
• Supply Voltage (max): 5.5 V
• Supply Voltage (min): 2.7 V
• Supply Current (typ): 2.5 mA
• Mounting Style: SMD/SMT
• Maximum Operating Temperature: + 85 C
• Package / Case: TQFN-40
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

PMBus 6-Channel Power-Supply Manager
The MAX34440 is a highly integrated system monitor
based upon a 16-bit MAXQ
ry-programmed functionality to monitor up to six power
supplies. The device provides power-supply closed-loop
control, and local/remote thermal-sensing facilities.
The power-supply manager monitors the power-supply
output voltage and constantly checks for user-pro-
grammable overvoltage and undervoltage thresholds. It
also can margin the power-supply output voltage up or
down by a user-programmable level. The margining is
performed in a closed-loop arrangement, whereby the
device automatically adjusts a pulse-width-modulated
(PWM) output and then measures the resultant output
voltage. The power-supply manager can also sequence
Table 1. PMBus Command Codes
MAXQ is a registered trademark of Maxim Integrated
Products, Inc.
14
CODE
2Ah
4Ah
00h
01h
02h
03h
10h
11h
12h
19h
20h
25h
26h
38h
40h
42h
43h
44h
46h
4Fh
51h
5Eh
5Fh
PAGE
OPERATION
ON_OFF_CONFIG
CLEAR_FAULTS
WRITE_PROTECT
STORE_DEFAULT_ALL
RESTORE_DEFAULT_ALL
CAPABILITY
VOUT_MODE
VOUT_MARGIN_HIGH
VOUT_MARGIN_LOW
VOUT_SCALE_MONITOR
IOUT_CAL_GAIN
VOUT_OV_FAULT_LIMIT
VOUT_OV_WARN_LIMIT
VOUT_UV_WARN_LIMIT
VOUT_UV_FAULT_LIMIT
IOUT_OC_WARN_LIMIT
IOUT_OC_FAULT_LIMIT
OT_FAULT_LIMIT
OT_WARN_LIMIT
POWER_GOOD_ON
POWER_GOOD_OFF
COMMAND NAME
Detailed Description
M
microcontroller with facto-
Read Byte
Read Byte
Send Byte
Send Byte
Send Byte
R/W Word
R/W Word
R/W Word
R/W Word
R/W Word
R/W Word
R/W Word
R/W Word
R/W Word
R/W Word
R/W Word
R/W Word
R/W Word
R/W Word
R/W Byte
R/W Byte
R/W Byte
R/W Byte
TYPE
PAGE
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
0–5
—
—
W
W
W
R
R
the supplies in any order at both power-up and power-
down. With the addition of an external current-sense
amplifier, the device can also monitor currents.
Thermal monitoring can be accomplished using up to
eight temperature sensors, including an on-chip ther-
mal sensor, four DS75LV digital thermometers, and a
MAX6695 dual remote/local thermal temperature sensor.
Communication with the DS75LV and MAX6695 tem-
perature sensors is conducted through a dedicated I
SMBus interface.
The device provides ALERT and FAULT output signals.
Host communications are conducted through a PMBus-
compatible communications port. Address input con-
nections are also provided to allow up to four MAX34440
devices to reside on the system’s I/O bus.
(NOTE 1)
PAGE
6–13
R/W
R/W
R/W
R/W
R/W
—
—
—
—
—
—
—
—
—
—
—
—
—
W
W
W
R
R
PAGE
R/W
R/W
R/W
255
—
—
—
—
—
—
—
—
—
—
—
—
—
—
W
W
W
W
R
R
NO. OF
BYTES
1
1
1
0
1
0
0
1
1
2
2
2
2
2
2
2
2
2
2
2
2
2
2
(NOTE 2)
STORED
FLASH
FIXED
N
N
N
N
N
N
N
Y
Y
Y
Y
Y
Y
Y
Y
Y
Y
Y
Y
Y
Y
Y
DEFAULT
(NOTE 2)
00h/10h
VALUE
0000h
0000h
7FFFh
0000h
7FFFh
7FFFh
0000h
0000h
7FFFh
0000h
7FFFh
7FFFh
0000h
0000h
1Ah
00h
00h
00h
40h
—
—
—
2
C/