ltc4269cdkd-2 Linear Technology Corporation, ltc4269cdkd-2 Datasheet - Page 9

• Manufacturer Part Number: ltc4269cdkd-2
• Description: Ieee 802.3at High Power Pd And Synchronous Forward Controller With Aux Support
• Manufacturer: Linear Technology Corporation

TYPICAL PERFORMANCE CHARACTERISTICS
200
150
100
100
90
50
80
70
0
–50
100
t
Temperature
OUT : Max Duty Cycle vs f
DELAY
T
SS_MAXDC = 2.5V
SD_V
A
= 25°C
–25
SEC
: SOUT Rise to OUT Rise vs
200
= 1.4V
0
TEMPERATURE (°C)
R
R
2.08
1.96
1.84
1.72
1.60
2.32
2.20
DELAY
DELAY
f
25
OSC
100
300
SS_MAXDC Setting vs f
(for OUT DC = 72%)
= 120k
= 40k
T
SD_V
R
(kHz)
A
DELAY
50
= 25°C
SEC
= 10k
75
200
= 1.32V
400
OSC
100
42692 G28
42692 G31
f
OSC
300
125
500
(kHz)
OSC
400
240
160
80
90
80
70
60
50
40
30
20
10
0
0
1.32
0
t
R
OUT : Max Duty Cycle CLAMP vs
SD_V
42692 G34
DELAY
T
T
SS_MAXDC = 1.84V
f
R
OSC
DELAY
A
A
DELAY
= 25°C
= 25°C
500
40
= 200kHz
SEC
: SOUT Rise to OUT Rise vs
= 10k
1.65
80
SD_V
R
DELAY
120
1.98
SEC
(k)
(V)
160
2.31
200
0.8
0.6
0.4
0.2
1.2
1.0
0
–50
42692 G32
SS_MAXDC Reset and Active
Thresholds vs Temperature
42692 G29
2.64
240
–25
0
TEMPERATURE (°C)
ACTIVE THRESHOLD
RESET THRESHOLD
100
125
75
50
25
60
50
40
30
90
80
70
20
0
25
1.60
0
OUT Rise/Fall Time vs OUT Load
Capacitance
OUT : Max Duty Cycle CLAMP vs
SS_MAXDC
T
T
f
R
OSC
A
A
DELAY
= 25°C
50
= 25°C
= 200kHz
1000
OUT LOAD CAPACITANCE (pF)
= 10k
75
t
LTC4269-2
SS_MAXDC (V)
r
2000
1.84
100
42692 G35
t
125
f
3000
SD_V
SD_V
SD_V
SEC
SEC
SEC
4000
2.08
= 1.32V
= 1.98V
= 2.64V
42692 G30
42692 G33
42692f
9
5000