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LTC4268IDKD-1
P1-P3
P4-P6
P7-P9
P10-P12
P13-P15
P16-P18
P19-P21
P22-P24
P25-P27
P28-P30
P31-P33
P34-P36
P37-P39
P40-P42
P43-P45
P46-P46
42681fc
L
TC4268-1
7
TEMPERA
TURE (°C)
–50
V
CC
(V)
15
25
42681 G10
12
10
–25
0
50
9
8
16
14
13
11
75
100
125
V
CC(ON)
V
CC(OFF)
TEMPERA
TURE (°C)
–50
I
VCC
(µA)
200
250
300
25
75
42681 G11
150
100
–25
0
50
100
125
50
0
TEMPERA
TURE (°C)
–50
8
9
25
75
42681 G12
7
6
–25
0
50
100
125
5
4
3
10
I
VCC
(mA)
DYNAMIC CURRENT C
PG
= 1nF
,
C
SG
= 1nF
, f
OSC
= 100kHz
ST
A
TIC P
AR
T CURRENT
V
CC
= 14V
TEMPERA
TURE (°C)
–50
90
SENSE VOLTAGE (mV)
92
96
98
100
110
104
0
50
75
42681 G13
94
106
108
102
–25
25
100
125
FB = 1.1V
SENSE = V
SENSE
+
WITH V
SENSE
–
= 0V
TEMPERATURE (°C)
–50
SENSE VOLTAGE (mV)
215
25
42681 G14
200
190
–25
0
50
185
180
220
210
205
195
75
100
125
SENSE = V
SENSE
+
WITH V
SENSE
–
= 0V
TEMPERATURE (°C)
–50
90
f
OSC
(kHz)
92
96
98
100
110
104
0
50
75
42681 G15
94
106
108
102
–25
25
100
125
C
OSC
= 100pF
TEMPERATURE (°C)
–50
1.230
V
FB
(V)
1.231
1.233
1.234
1.235
1.240
1.237
0
50
75
42681 G16
1.232
1.238
1.239
1.236
–25
25
100
125
TEMPERATURE (°C)
–50
FEEDBACK PIN INPUT BIAS (nA)
200
250
300
25
75
42681 G17
150
100
–25
0
50
100
125
50
0
R
CMP
OPEN
TEMPERATURE (°C)
–50
V
FB
RESET (V)
1.03
25
42681 G18
1.00
0.98
–25
0
50
0.97
0.96
1.04
1.02
1.01
0.99
75
100
125
Typical
perForMance
characTerisTics
V
CC(ON)
and V
CC(OFF)
vs T
emperature
V
CC
Start-Up Current
vs T
emperature
V
CC
Current vs T
emperature
SENSE Voltage vs T
emperature
SENSE Fault Voltage
vs T
emperature
Oscillator Frequency
vs T
emperature
V
FB
vs T
emperature
Feedback Pin Input Bias
vs T
emperature
V
FB
Reset vs T
emperature
L
TC4268-1
8
42681fc
V
FB
(V)
0.9
–70
I
VCMP
(µA)
–50
–30
–10
70
30
1
1.1
1.4
50
10
1.2
1.3
1.5
42681 G19
125°C
25°C
–40°C
TEMPERATURE (°C)
–50
I
VCMP
(µA)
60
65
70
25
75
42681 G20
55
50
–25
0
50
100
125
45
40
SOURCE CURRENT
V
FB
= 1.1V
SINK
CURRENT
V
FB
= 1.4V
TEMPERATURE (°C)
–50
900
g
m
(µmho)
950
1000
1050
1100
–25
0
25
50
42681 G21
75
100
125
TEMPERATURE (°C)
–50
A
V
(V/V)
1550
25
42681 G22
1400
1300
–25
0
50
1250
1200
1150
1100
1600
1650
1700
1500
1450
1350
75
100
125
TEMPERATURE (°C)
–50
UVLO (V)
1.240
1.245
1.250
25
75
42681 G23
1.235
1.230
–25
0
50
100
125
1.225
1.220
TEMPERATURE (°C)
–50
3.4
3.5
3.7
25
75
42681 G24
3.3
3.2
–25
0
50
100
125
3.1
3.0
3.6
I
UVLO
(µA)
TEMPERATURE (°C)
–50
SFST CHARGE CURRENT (µA)
23
25
42681 G25
20
18
–25
0
50
17
16
15
22
21
19
75
100
125
CAPACITANCE (nF)
0
TIME (ns)
80
70
60
50
40
30
20
10
0
8
42681 G26
2
4
6
10
7
1
3
5
9
T
A
= 25°C
FALL TIME
RISE TIME
Typical
perForMance
characTerisTics
Feedback Amplifier Output
Current vs V
FB
Feedback Amplifier Source and
Sink Current vs T
emperature
Feedback Amplifier g
m
vs T
emperature
Feedback Amplifier Voltage Gain
vs T
emperature
UVLO vs T
emperature
I
UVLO
Hysteresis vs T
emperature
Soft-Start Charge Current
vs T
emperature
PG, SG Rise and Fall Times
vs Load Capacitance
42681fc
L
TC4268-1
9
TEMPERATURE (°C)
–50
–25
19.0
V
CC
(V)
20.0
21.5
0
50
75
42681 G27
19.5
21.0
20.5
25
100
125
I
CC
= 10mA
TEMPERATURE (°C)
–50
t
ON(MIN)
(ns)
330
25
42681 G28
300
280
–25
0
50
270
260
340
320
310
290
75
100
125
R
tON(MIN)
= 158k
TEMPERATURE (°C)
–50
0
t
PGDLY
(ns)
50
150
200
250
0
50
75
42681 G29
100
–25
25
100
125
300
R
PGDLY
= 16.9k
R
PGDLY
= 27.4k
TEMPERATURE (°C)
–50
t
ENDLY
(ns)
285
305
325
25
75
42681 G30
265
245
–25
0
50
100
125
225
205
R
ENDLY
= 90k
V
CC
Clamp Voltage
vs T
emperature
Typical
perForMance
characTerisTics
Minimum PG On Time
vs T
emperature
PG Delay Time vs T
emperature
Enable Delay Time
vs T
emperature
P1-P3
P4-P6
P7-P9
P10-P12
P13-P15
P16-P18
P19-P21
P22-P24
P25-P27
P28-P30
P31-P33
P34-P36
P37-P39
P40-P42
P43-P45
P46-P46
LTC4268IDKD-1
Mfr. #:
Buy LTC4268IDKD-1
Manufacturer:
Analog Devices / Linear Technology
Description:
Power Switch ICs - POE / LAN LTC4268-1 - High Power PD with Synchronous NoOpto Flyback Controller
Lifecycle:
New from this manufacturer.
Delivery:
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