LTC4266 LINER [Linear Technology], LTC4266 Datasheet - Page 9

• Manufacturer Part Number: LTC4266
• Description: Quad IEEE 802.3at Power over Ethernet Controller
• Manufacturer: LINER [Linear Technology]

TYPICAL PERFORMANCE CHARACTERISTICS
–0.5
–1.0
300
250
200
150
100
1.0
0.5
50
0
0
0
ADC Noise Histogram
Current Readback in Slow Mode
ADC Integral Nonlinearity
Voltage Readback in Fast Mode
V
SENSEn
6139
10
– V
EE
6141
PORT VOLTAGE (V)
20
= 110.4mV
ADC OUTPUT
30
6143
2.5
1.5
0.5
3
2
1
0
0
INT and SDAOUT Pull Down Voltage
vs Load Current
40
6145
5
50
10
LOAD CURRENT (mA)
4266 G17
4266 G20
6147
15
60
20
25
–0.5
–1.0
600
500
400
300
200
100
1.0
0.5
30
0
0
CURRENT SENSE RESISTOR INPUT VOLTAGE (mV)
0
ADC Noise Histogram Port
Voltage Readback in Slow Mode
ADC Integral Nonlinearity
Current Readback in Slow Mode
AGND – V
8532
35
50
4266 G23
100
40
OUTn
8533
150
200 250
ADC OUTPUT
= 48.3V
8534
300
8535
500mA/DIV
350
CURRENT
VOLTAGE
VOLTAGE
20V/DIV
10V/DIV
400
PORT
PORT
GATE
450
8536
4266 G18
4266 G21
GND
0mA
V
V
500
EE
EE
MOSFET Gate Drive With Fast
Pull Down
APPLIED
FAULT
50
–0.5
–1.0
600
500
400
300
200
100
1.0
0.5
0
0
0
ADC Noise Histogram Port
Voltage Readback in Fast Mode
ADC Integral Nonlinearity
Voltage Readback in Slow Mode
AGND – V
260
FAST PULL DOWN
100µs/DIV
10
261
50 FAULT REMOVED
OUTn
PORT VOLTAGE (V)
20
CURRENT LIMIT
= 48.3V
ADC OUTPUT
262
30
V
V
LTC4266
DD
EE
263
= –54V
= 3.3V
4266 G24
40
264
50
4266 G22
265
4266 G19
4266fb
9
60