ltc4267-3 Linear Technology Corporation, ltc4267-3 Datasheet - Page 5

• Manufacturer Part Number: ltc4267-3
• Description: Power Over Ethernet Ieee 802.3af Pd Interface With Integrated 300khz Switching Regulator
• Manufacturer: Linear Technology Corporation

TYPICAL PERFOR
0.5
0.4
0.3
0.2
0.1
0
3
2
1
0
4
3
2
1
0
–40
0
Input Current vs Input Voltage
25k Detection Range
0
Input Current vs Input Voltage
Power Good Output Low Voltage
vs Current
T
EXCLUDES ANY LOAD CURRENT
T
T
A
A
A
= 25°C
= 25°C
= 25°C
–2
2
–45
V
V
PORTN
PORTN
CURRENT (mA)
–4
4
VOLTAGE (V)
VOLTAGE (V)
–50
–6
6
–55
W
–8
8
A
42673 G07
42673 G01
42673 G04
U
–10
–60
10
CE CHARACTERISTICS
V1:
V2:
120
30
90
60
26
24
22
50
40
30
20
10
28
27
25
23
0
0
–2
–1
0
Input Current vs Input Voltage
Classifi cation Range
0
Signature Resistance
vs Input Voltage
P
LTC4267-3 ONLY
V
T
RESISTANCE =
DIODES: S1B
T
T
OUT
A
IN
A
A
= 25°C
= 25°C
= 25°C
= 0V
–10
Leakage Current
–3
–4
LTC4267-3 + 2 DIODES
P
V
V
OUT
–20
PORTN
PORTN
20
CLASS 3
CLASS 2
CLASS 1
CLASS 0
CLASS 4
∆V
∆I
PIN VOLTAGE (V)
–5
=
–6
VOLTAGE (V)
VOLTAGE (V)
–30
V2 – V1
IEEE LOWER LIMIT
IEEE UPPER LIMIT
I
2
– I
1
–40
–7
40
–8
–50
–10
42673 G08
–9
42673 G02
42673 G05
–60
60
11.0
10.5
10.0
12.0
11.5
400
300
200
100
9.0
9.5
–1
–2
1
2
0
–40
–12
–40
Input Current vs Input Voltage
Normalized UVLO Threshold
vs Temperature
Current Limit vs Input Voltage
CLASS 1 OPERATION
APPLICABLE TO TURN-ON
AND TURN-0FF THRESHOLDS
–20
–14
–45
V
V
TEMPERATURE (°C)
PORTN
0
PORTN
– 40°C
– 40°C
85°C
85°C
LTC4267-3
–16
–40°C
85°C
20
VOLTAGE (V)
VOLTAGE (V)
–50
HIGH CURRENT MODE
LOW CURRENT MODE
–18
40
–55
60
–20
42673 G03
42673 G06
42673 G09
80
5
42673f
–60
–22