MAX8688ALETG+ Maxim Integrated Products, MAX8688ALETG+ Datasheet - Page 9

• 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

Figure 1. MAX8688 Functional Diagram
For many applications, it is desirable to control the out-
put voltage of a POL power supply to a much higher
accuracy than the offered standard 1% overtempera-
ture specification. Many designs are required to
access information such as output voltage, output cur-
rent, and temperature of individual power supplies in a
board, for monitoring system health as well as logging
fault information to help in failure analysis. Moreover, it
is desirable to sequence startup and shutdown of multi-
ple power supplies in an application with programma-
ble start, stop delays, and soft-start ramp rates to avoid
MAXQ is a registered trademark of Maxim Integrated Products, Inc.
0.1µF
3.3V
_______________________________________________________________________________________
Digital Power-Supply Controller/Monitor
A1/SCLE
A2/SDAE
A3/ONOFF
SCL
SDA
RST
FLT
CLKIO
Detailed Description
DVDD
DGND
PMBus COMMAND AND
STATUS REGISTERS
CONTROLLER
SMBus
MAXQ
POWER MONITOR
MAX8688
®
µC
INTERNAL REFERENCE
TEMP SENSOR
ADC
DAC
latchup and stressing of ESD structures. The MAX8688
solves these problems by providing the required func-
tions in a small compact IC that is capable of interfac-
ing with a master controller through an on-board
PMBus interface. Up to 127 MAX8688s can reside on
the same PMBus bus, each controlling its own POL,
under command from the system controller, as shown
in Figure 2. Long traces from POLs located at various
system board locations for voltage sensing and current
sensing are avoided resulting in a cleaner layout for the
system designer. POLs can therefore be placed close
to the load where they provide the best transient
response with short power plane runs.
with PMBus Interface
AGND
AVDD
200Ω
200Ω
S1
DACOUT
ENOUT
ISN_C
RS_C
REFO
ISN+
ISN-
RS+
RS-
0.1µF
1µF
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