MAX5965BUAX+ Maxim Integrated Products, MAX5965BUAX+ Datasheet - Page 41

• Manufacturer Part Number: MAX5965BUAX+
• Description: IC PSE CTRLR FOR POE 36SSOP
• Manufacturer: Maxim Integrated Products
• Type: Power Over Ethernet Controller (PoE)r

Specifications of MAX5965BUAX+

• Applications: IP Phones, Power over LAN, Network Routers and Switches
• Internal Switch(s): No
• Voltage - Supply: 2.4 V ~ 3.6 V
• Operating Temperature: 0°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: 36-BSOP (0.300", 7.5mm Width)
• Supply Voltage (max): 60 V
• Supply Voltage (min): 32 V
• Power Dissipation: 1388.9 mW
• Operating Temperature Range: 0 C to + 85 C
• Mounting Style: SMD/SMT
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

The IVEE bits enable the current-limit scaling (Table
32). This feature is used to reduce the current limit for
systems running at higher voltage to maintain the
The three ICUT_ bits (Tables 34a and 34b) allow pro-
gramming of the current-limit and overcurrent thresholds
in excess of the IEEE 802.3af standard limit. The
MAX5965A/MAX5965B can automatically set the ICUT
register or can be manually written to by the software
(see Table 3).
Table 32. Miscellaneous Configurations 2
Table 34a. ICUT Registers 1 and 2
Table 34b. ICUT Registers 3 and 4
Reserved
ICUT4
Reserved
ICUT3
Reserved
LSC_EN
IVEE
Reserved
ICUT2
Reserved
ICUT1
SYMBOL
High-Power, Quad, Monolithic, PSE Controllers
SYMBOL
SYMBOL
ADDRESS = 29h
ADDRESS = 2Bh
ADDRESS = 2Ah
BIT
______________________________________________________________________________________
7
6
5
4
3
2
1
0
BIT
BIT
7
6
5
4
3
2
1
0
7
6
5
4
3
2
1
0
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
R/W
—
—
—
—
Reserved
Reserved
Reserved
Reserved
Reserved
LSC_EN
IVEE[1]
IVEE[0]
Reserved
ICUT4[2]
ICUT4[1]
ICUT4[0]
Reserved
ICUT3[2]
ICUT3[1]
ICUT3[0]
Reserved
ICUT2[2]
ICUT2[1]
ICUT2[0]
Reserved
ICUT1[2]
ICUT1[1]
ICUT1[0]
DESCRIPTION
for Power over Ethernet
desired output power. Table 33 sets the current-limit
scaling register. A reset or power-up sets R29h = 00h.
Class 1 and 2 limits can also be programmed by soft-
ware independently from the classification status. See
Table 3. A reset or power-up sets R2Ah = R2Bh = 00h.
Table 33. Current-Limit Scaling Register
(ADDRESS = 29h)
DESCRIPTION
DESCRIPTION
IVEE[1:0]
00
01
10
11
CURRENT LIMIT
Default
(%)
-10
-15
-5
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