ltc4266a Linear Technology Corporation, ltc4266a Datasheet - Page 9

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

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
PORT VOLTAGE (V)
20
6141
= 110.4mV
2.5
1.5
0.5
ADC OUTPUT
0
3
2
1
0
INT and SDAOUT Pull-Down Voltage
vs Load Current
30
6143
5
40
10
6145
LOAD CURRENT (mA)
50
15
4266AC G20
4266AC G17
6147
20
60
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 Integral Nonlinearity
Current Readback in Slow Mode
ADC Noise Histogram Port
Voltage Readback in Slow Mode
AGND – V
8532
4266AC G23
35
50
100
40
OUTn
8533
150
ADC OUTPUT
200 250
= 48.3V
500mA/DIV
8534
CURRENT
VOLTAGE
VOLTAGE
20V/DIV
10V/DIV
PORT
PORT
GATE
300
8535
350
GND
0mA
V
V
EE
EE
400
MOSFET Gate Drive with Fast
Pull-Down
APPLIED
4266AC G18
4266AC G21
8536
450
FAULT
50Ω
500
LTC4266A/LTC4266C
FAST PULL-DOWN
100μs/DIV
50Ω FAULT REMOVED
–0.5
–1.0
600
500
400
300
200
100
1.0
0.5
0
0
CURRENT LIMIT
0
ADC Noise Histogram Port
Voltage Readback in Fast Mode
ADC Integral Nonlinearity
Voltage Readback in Slow Mode
AGND – V
260
V
V
DD
EE
10
= –54V
= 3.3V
261
4266AC G24
OUTn
20
PORT VOLTAGE (V)
= 48.3V
ADC OUTPUT
262
30
263
40
264
50
4266AC G19
4266AC G22
4266acfa
265
9
60