參數(shù)資料
型號： LT3751IUFD#TR
廠商： LINEAR TECHNOLOGY CORP
元件分類： 電源管理
英文描述： 1-CHANNEL POWER SUPPLY SUPPORT CKT, PQCC20
封裝： 4 X 5 MM, PLASTIC, QFN-20
文件頁數(shù)： 23/34頁
文件大?。?/td> 403K
代理商： LT3751IUFD#TR
LT3751
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ELECTRICAL CHARACTERISTICS The l denotes the specications which apply over the full operating
temperature range, otherwise specications are TA = 25°C. VCC = CHARGE = 5V, CLAMP = 0V, unless otherwise noted. Individual 25kΩ
resistors tied from 5V VTRANS supply to RVTRANS, RVOUT, RDCM, unless otherwise noted. (Note 2)
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
VCC Voltage
l
4.75
24
V
RVTRANS Voltage
(Note 3)
l
4.75
65
V
VCC Quiescent Current
Not Switching, CHARGE = 5V
Not Switching, CHARGE = 0.3V
5.5
0
8
1
mA
μA
RVTRANS, RDCM Quiescent Current
(Note 4)
Not Switching, CHARGE = 5V
Not Switching, CHARGE = 0.3V
l
35
40
0
45
1
μA
RVOUT Quiescent Current
(Note 4)
Not Switching, CHARGE = 5V
Not Switching, CHARGE = 0.3V
l
42
47
0
52
1
μA
UVLO1, UVLO2, OVLO1, OVLO2 Clamp Voltage
Measured at 1mA into Pin, CHARGE = 0V
55
V
RVTRANS, RVOUT, RDCM Clamp Voltage
Measured at 1mA into Pin, CHARGE = 0V
60
V
CHARGE Pin Current
CHARGE = 24V
CHARGE = 5V
CHARGE = 0V
425
60
1
μA
CHARGE Minimum Enable Voltage
l
1.5
V
CHARGE Maximum Disable Voltage
IVCC ≤ 1μA
l
0.3
V
Minimum CHARGE Pin Low Time
20
μs
One-Shot Clock Period
l
32
38
44
μs
VOUT Comparator Trip Voltage
Measured at RBG Pin
l
0.955
0.98
1.005
V
VOUT Comparator Overdrive
2μs Pulse Width,
RVTRANS, RVOUT = 25kΩ
RBG = 0.83kΩ
20
40
mV
DCM Comparator Trip Voltage
Measured as VDRAIN – VTRANS, RDCM = 25kΩ, VCC = 4.75V
(Note 5)
350
600
900
mV
Current Limit Comparator Trip Voltage
FB Pin = 0V
FB Pin = 1.3V
l
100
7
106
11
112
15
mV
FB Pin Bias Current
Current Sourced from FB Pin, Measured at FB Pin Voltage
64
300
nA
FB Pin Voltage
(Note 6)
l
1.19
1.22
1.25
V
FB Pin Charge Mode Threshold
1.12
1.16
1.2
V
FB Pin Charge Mode Hysteresis
(Note 7)
55
mV
FB Pin Overvoltage Mode Threshold
1.29
1.34
1.38
V
FB Pin Overvoltage Hysteresis
60
mV
DONE Output Signal High
100kΩ to 5V
5
V
DONE Output Signal Low
100kΩ to 5V
40
200
mV
DONE Leakage Current
DONE = 5V
5
200
nA
FAULT Output Signal High
100kΩ to 5V
5
V
FAULT Output Signal Low
100kΩ to 5V
40
200
mV
FAULT Leakage Current
FAULT = 5V
5
200
nA
UVLO1 Pin Current
UVLO1 Pin Voltage = 1.24V
l
48.5
50
51.5
μA
UVLO2 Pin Current
UVLO2 Pin Voltage = 1.24V
l
48.5
50
51.5
μA
OVLO1 Pin Current
OVLO1 Pin Voltage = 1.24V
l
48.5
50
51.5
μA
OVLO2 Pin Current
OVLO2 Pin Voltage = 1.24V
l
48.5
50
51.5
μA
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