ltc4266a Linear Technology Corporation, ltc4266a Datasheet - Page 3

• Manufacturer Part Number: ltc4266a
• Description: Quad Poe/poe+/ltpoe++ Pse Controller
• Manufacturer: Linear Technology Corporation

ELECTRICAL CHARACTERISTICS
temperature range, otherwise specifications are at T
unless otherwise noted. (Notes 3, 4)
SYMBOL
V
V
I
I
Detection
V
Classification
V
V
Gate Driver
Output Voltage Sense
V
EE
DD
EE
DD
OC
CLASS
MARK
PG
PARAMETER
Main PoE Supply Voltage
Undervoltage Lockout
V
Undervoltage Lockout
Allowable Digital Ground Offset
V
V
Detection Current – Force Current
Detection Voltage – Force Voltage
Detection Current Compliance
Detection Voltage Compliance
Detection Voltage Slew Rate
Minimum Valid Signature Resistance
Maximum Valid Signature Resistance
Classification Voltage
Classification Current Compliance
Classification Threshold Current
Classification Mark State Voltage
Mark State Current Compliance
GATE Pin Pull-Down Current
GATE Pin Fast Pull-Down Current
GATE Pin On Voltage
Power Good Threshold Voltage
OUT Pin Pull-Up Resistance to AGND
DD
EE
DD
Supply Current
Supply Voltage
Supply Current
A
CONDITIONS
AGND – V
For IEEE Type 1 Compliant Output
For IEEE Type 2 Compliant Output
For LTPoE ++ Compliant Output
AGND – V
V
DGND – V
(AGND – V
(V
First Point, AGND – V
Second Point, AGND – V
AGND – V
AGND – V
AGND – V
AGND – V
AGND – V
V
Class 0 – 1
Class 1 – 2
Class 2 – 3
Class 3 – 4
Class 4 – Overcurrent
AGND – V
V
Port Off, V
Port Off, V
V
V
V
0V ≤ (AGND – V
= 25°C. AGND – V
DD
OUTn
OUTn
GATEn
GATEn
OUTn
DD
First Point
Second Point
– DGND
– DGND) = 3.3V
– V
= AGND
= AGND
= V
– V
The
EE
EE
EE
OUTn
OUTn
OUTn
OUTn
OUTn
OUTn
EE
GATEn
GATEn
EE
EE
EE
l
, I
) = 55V
+ 5V
, 5μA ≤ I
, Open Port
, C
, 0mA ≤ I
, 0.1mA ≤ I
GATEn
denotes the specifications which apply over the full operating
= 0V
OUTn
= V
= V
PORT
EE
EE
= 1μA
) ≤ 5V
EE
OUTn
= 0.15μF
+ 5V
+ 1V
OUTn
CLASS
= 54V, AGND = DGND, and V
OUTn
CLASS
= 9V
≤ 500μA
= 3.5V
≤ 50mA
≤ 10mA
LTC4266A/LTC4266C
l
l
l
l
l
l
l
l
l
l
l
l
l
l
l
l
l
l
l
l
l
l
l
l
l
l
l
l
l
l
l
l
54.75
15.5
27.5
16.0
13.5
21.5
31.5
45.2
0.08
MIN
220
140
300
3.0
5.5
7.5
0.4
45
51
20
25
53
53
7
3
8
2
DD
– DGND = 3.3V
–2.4
10.4
29.7
14.5
0.12
TYP
240
160
500
3.3
2.2
1.1
0.8
6.5
2.4
25
17
61
23
33
48
61
30
12
8
4
9
MAX
0.01
18.5
20.5
15.5
24.5
34.9
50.8
260
180
700
4.3
0.9
7.5
2.8
57
57
57
30
57
–5
12
32
67
10
67
14
3
9
5
4266acfa
UNITS
3
V/μs
mA
mA
mA
mA
mA
mA
mA
mA
mA
mA
mA
mA
mA
kΩ
kΩ
kΩ
μA
μA
V
V
V
V
V
V
V
V
V
V
V
V
V
V