Datasheet
PIN SIGNAL DESCRIPTION
1 SCL I
2
C serial clock
2 SDA I
2
C serial data
3 GND Ground
4 VCC Power supply
5 SCL I
2
C serial clock
6 SDA I
2
C serial data
7 GND Ground
8 VCC Power supply
JP2 (A0) JP3 (A1)
DEVICE ADDRESS (hex)
WRITE READ
1-2 1-2 0xE0 0xE1
1-2 2-3 0xE4 0xE5
1-2 Open 0xE6 0xE7
2-3 1-2 0xF0 0xF1
2-3 2-3 0xF4 0xF5
2-3 Open 0xF6 0xF7
Open 1-2 0xF8 0xF9
Open 2-3 0xFC 0xFD
Open Open 0xFE 0xFF
PIN SIGNAL DESCRIPTION
1
Power
source
This pin should be attached to the positive
terminal of the external power supply. The
external power source should be greater
than 0V and less than 30V.
2 Load
This pin should be attached to a ground-
referenced load.
3 Ground
External ground. This ground connection
is referenced to the module ground on
pin 5 of connector J1.
1A MAX
30V DC
MAX
MAX9611PMB1
V+
LD
GND
LOAD
CONTROL
J3
SENSE
_________________________________________________________________ Maxim Integrated Products 3
MAX9611PMB1 Peripheral Module
Connector J2 allows the module to be connected through
a daisy-chain from another I
2
C module and/or provide
I
2
C and power connections to other I
2
C modules on the
same bus. See Table 2.
I
2
C Addressing Options
Both the MAX5380M and MAX9611 reside on the I
2
C
bus. The MAX5380M has a fixed I
2
C slave address of
0x62 (other versions of the MAX5380 are available with
different I
2
C slave addresses). The I
2
C slave address
for the MAX9611 can be one of nine different values
depending on the settings on jumpers JP2 and JP3.
Table 3 lists the settings of those jumpers and the cor-
responding values of the slave read and write address.
Refer to the MAX9611/MAX9612 IC data sheet for more
information.
Connecting an External
Power Supply and Load
The peripheral module provides high-side current limiting
for an external power supply and load. The supply and
load should be connected to the peripheral module, as
shown in Figure 1. Although the IC is capable of opera-
tion up to 60V, the external supply should not exceed
30V due to voltage limitations of the Si2303 pFET. While
the pass components are rated to 2.7A, operation
above 1A may not yield reliable results due to thermal
limitations. Reliable operation of this circuit above 1A
should be possible in the user’s application if additional
surface/heatsink area for both the Si2303 pFET and the
0.2I sense resistor is provided.
The J3 connector provides for the attachment of an exter-
nal power supply and load. See Table 4.
Table 2. Connector J2 (I
2
C Expansion)
Table 4. Connector J3 (External Power
and Load)
Table 3. I
2
C Slave Addresses (MAX9611)
Figure 1. Connection of an External Power Supply and Load