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參數(shù)資料
| 型號： | LTC4263IS#TRPBF |
| 廠商： | Linear Technology |
| 文件頁數(shù)： | 3/24頁 |
| 文件大小： | 354K |
| 描述： | IC IEEE 803.2AF CNTRLR 14-SOIC |
| 標準包裝： | 2,500 |
| 類型： | 以太網(wǎng)供電（PoE） |
| 應(yīng)用： | 用于以太網(wǎng)供電（PoE）設(shè)備的電源接口開關(guān) |
| 電源電壓： | 48V |
| 工作溫度： | -40°C ~ 85°C |
| 安裝類型： | 表面貼裝 |
| 封裝/外殼： | 14-SOIC（0.154"，3.90mm 寬） |
| 供應(yīng)商設(shè)備封裝： | 14-SOIC |
| 包裝： | 帶卷 (TR) |
LTC4263
3
4263fe
ELECTRICAL CHARACTERISTICS
The l denotes the speci cations which apply over the full operating
temperature range, otherwise speci cations are at T
A
= 25癈. V
DD48
V
SS
= 48V and V
DD5
not driven externally. All voltages are
relative to V
SS
unless otherwise noted. (Notes 2, 5)
SYMBOL
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
V
OVLO_OFF
OVLO Turn-Off Voltage
V
DD48
V
SS
Increasing
l
66
70
74
V
V
OVLO_HYS
OVLO Hysteresis
l
0.2
2
V
V
DD5
V
DD5
Supply Voltage
Driven Externally
l
4.5
5
5.5
V
V
DD5
Internal Supply
Driven Internally
l
4.3
4.4
4.5
V
I
DD48
V
DD48
Supply Current
V
DD5
V
SS
= 5V
Internal V
DD5
l
l
1
2
2
4
mA
mA
I
DD5
V
DD5
Supply Current
V
DD5
V
SS
= 5V
l
1
2
mA
Power MOSFET
R
ON
On-Resistance
I = 350mA, Measured From OUT to V
SS
l
1.5
2.4
3.0
?/DIV>
?/DIV>
I
OUT_LEAK
OUT Pin Leakage
V
OUT
V
SS
= V
DD48
V
SS
= 57V
l
1
10
糀
R
PU
OUT Pin Pull-Up Resistance to V
DD48
0V d (V
DD48
V
OUT
) d 5V
l
360
500
640
k?/DIV>
Current Control
I
CUT
Overload Current Threshold
Class 0, Class 3, Class 4 (Note 6)
Class 2
Class 1
l
l
l
355
165
95
375
175
100
395
185
105
mA
mA
mA
I
LIM
Short-Circuit Current Limit
V
OUT
V
SS
= 5V
V
DD48
V
OUT
= 30V
l
l
405
405
425
425
445
445
mA
mA
I
FB
Foldback Current Limit
V
DD48
V
OUT
= 0V (Note 7)
V
DD48
V
OUT
= 10V
l
l
30
110
60
140
120
180
mA
mA
I
MIN
DC Disconnect Current Threshold
l
5.2
7.5
9.8
mA
I
FAULT
High Speed Fault Current Limit
(Note 8)
l
500
650
800
mA
Detection
I
DET
Detection Current
First Point, V
DD48
V
OUT
= 10V
Second Point, V
DD48
V
OUT
= 3.5V
l
l
235
160
255
180
275
200
糀
糀
V
DET
Detection Voltage Compliance
V
DD48
V
OUT
, Open Port
V
DD48
V
SS
= 57V
l
21
V
R
DETMIN
Minimum Valid Signature Resistance
l
15.5
17
18.5
k?/DIV>
R
DETMAX
Maximum Valid Signature Resistance
l
27.5
29.7
32
k?/DIV>
R
OPEN
Open Circuit Threshold
l
500
2000
k?/DIV>
Classi cation
V
CLASS
Classi cation Voltage
V
DD48
V
OUT
, 0mA d I
CLASS
d 50mA
l
16.5
20.5
V
I
CLASS
Classi cation Current Compliance
V
OUT
= V
DD48
l
55
60
75
mA
I
TCLASS
Classi cation Threshold Current
Class 0 1
Class 1 2
Class 2 3 (Note 9)
l
l
l
5.5
13.5
21.5
6.5
14.5
23
7.5
15.5
24.5
mA
mA
mA
Power Management
V
PWRMGT
Power Management Pin Threshold
l
0.98
1
1.02
V
I
PWRMGT
Power Management Pin Output Current
Class 0, Class 3, Class 4
Class 1
Class 2
l
l
l
75.6
19.6
34.3
72.3
18.8
32.8
69
17.9
31.3
糀
糀
糀
AC Disconnect
R
OSC
OSC Pin Input Impedance
2V d (V
OSC
V
SS
) d 3V
l
175
250
325
k?/DIV>
I
OSC
OSC Pin Output Current
V
OSC
V
SS
= 2V
l
140
140
糀
f
OSC
OSC Pin Frequency
V
OSC
V
SS
= 2V
l
103
110
115
Hz
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