MAX8688ALETG/GH9-T Maxim Integrated, MAX8688ALETG/GH9-T Datasheet - Page 17

• Manufacturer Part Number: MAX8688ALETG/GH9-T
• Description: Current & Power Monitors & Regulators
• Manufacturer: Maxim Integrated

Specifications of MAX8688ALETG/GH9-T

• Supply Voltage - Max: 3.6 V
• Supply Voltage - Min: 3 V
• Operating Temperature Range: - 40 C to + 85 C

Figure 8 shows how the MAX8688 interfaces to an exter-
nal serial SOT23 EEPROM (such as Atmel AT24C01A)
using the A1/SCLE and A2/SDAE in applications where a
master controller does not exist or is not required. Using
the GUI, the user can select each MAX8688 device and
configure all the required output-voltage settings and
sequencing/tracking information. Once the configuration
is complete, the results can be saved to the external
EEPROM by using the STORE_DEFAULT_ALL command
and configuration restored on the MAX8688 power-on
reset. The EEPROM can also be preprogrammed prior to
board assembly in the manufacturing environment.
A3/ONOFF can be used as a control signal to turn on/off
the POL in a similar fashion as the OPERATION command.
Figure 8. Typical System Application with External EEPROM
V
A1
A2
A3
GND
CC
CONTROLLER
EEPROM
SYSTEM
______________________________________________________________________________________
CLKOUT
Digital Power-Supply Controller/Monitor
SCL
SDA
IRQ
33kΩ
33kΩ
0.1µF
3.3V
DVDD
DGND
A1/SCLE
A2/SDAE
A3/ONOFF
SCL
SDA
RST
FLT
CLKIO
Upon reset (power-on reset or applying the device
reset pulse to RST), the MAX8688 goes through an ini-
tialization process as shown in Figure 9.
After initialization, the MAX8688 constantly monitors the
PMBus and executes the PMBus command according-
ly. In addition, if the POL has been commanded to turn
on, the MAX8688 also monitors the POL output voltage,
current, and temperature at the MFR_SAMPLE_RATE.
The system controller monitors the POL health by issu-
ing various inquiries and status commands.
with PMBus Interface
MAX8688
DACOUT
ENOUT
ISN_C
AGND
AVDD
RS_C
REFO
ISN+
ISN-
RS+
RS-
1µF
0.1µF
MAX8688 Operation
REFIN
EN
VO+
R
LOAD
SENSE
POL
VO-
V
V
IN+
IN-
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