LT3992IUH Просмотр технического описания (PDF) - Linear Technology
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LT3992IUH Datasheet PDF : 36 Pages
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LT3992
Electrical Characteristics The l denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at TA = 25°C. VVIN1/2 = 15V unless otherwise specified. (Note 2)
PARAMETER
CONDITIONS
MIN
TYP
MAX
SHDN Voltage Threshold CH1/2
l 1.24
1.32
1.4
SHDN Input Current CH1/2
VIN1 Undervoltage Lockout (Note 3)
VIN1 Shutdown Current
VIN2 Shutdown Current
VIN1 Quiescent Current
VIN2 Quiescent Current
Feedback Voltage CH1/2
Feedback Voltage Regulation
Feedback Voltage Offset CH1 to CH2
Feedback Bias Current CH1/2
TJ Output Voltage (Note 4)
TJ Error
Error Amp gm CH1/2
Error Amp Source Current CH1/2
Error Amp Sink Current CH1/2
Error Amp High Clamp CH1/2
Error Amp Switching Threshold CH1/2
Soft-Start Source Current CH1/2
Soft-Start VOH CH1/2
Soft-Start Sink Current CH1/2
Soft-Start VOL CH1/2
Soft-Start to Feedback Offset CH1/2
SS POR Threshold CH1/2
VSHDN = 1.35V
–1
0
1
2.6
2.9
3.2
VSHDN = 0V
l
6
13
VSHDN = 0V
l
0.1
2
VFB1/2 = 2V
3
4.2
6
VFB1/2 = 2V
300
530
900
VVC1/2 = 1V
l 786
806
824
VVIN1/2 = 4V to 60V
l 780
806
830
VVC1/2 = 1V
l –13
0
13
VVC1/2 = 1V
l
0
85
300
TJ = 25°C, ITJ = 25µA, Temperature = 25°C
250
ITJ = 25µA, Temperature = 125°C
1.23
ITJ = 25µA, Temperature = –40°C
–380
Temperature = 25°C to 125°C
l –100
0
100
VVC1/2 = 1V, IVC1/2 = ±10µA
VFB1/2 = 0.7V, VVC1/2 = 1V
VFB1/2 =0.9V, VVC1/2 = 1V
VFB1/2 = 0.7V
VFB1/2 = 0V
VFB1/2 = 2V, VSS1/2 = 0.07V
VFB1/2 = 2.0V
VFB1/2 = 0.7V, VSS1/2 = 2V
VFB1/2 = 0V
VVC1/2 = 1V, VSS1/2 = 0.4V
250
350
450
15
25
40
15
25
40
1.7
1.9
2.1
0.8
1.0
1.2
l
9
13.5
17
1.9
2.15
2.4
0.4
0.9
2
130
170
210
l
16
0
16
70
110
140
Soft-Start Sink Current CH1/2 POR
Soft-Start SW Disable CH1/2
CMPI Bias Current CH1/2
CMPO Leakage CH1/2
CMPI Threshold CH1/2
CMPI Threshold CH1/2 of VFB1/2
CMPI Hysteresis CH1/2
CMPO Sink Current CH1/2
RT/SYNC Reference Current
RT/SYNC Reference Current
Minimum Switching Frequency
Switching Frequency
Maximum Switching Frequency
Switching Phase Angle CH1 ≥ CH2
VFB1/2 = 2V, VSS1/2 = 0.14V (Note 5)
VFB1/2 = 0V (Note 5)
VCMPI1/2 = 0.8V
VCMP1/2 = 0.8V, VCMPO1/2 = 60V
VCMPI1/2 Rising
VCMPI1/2 Rising (Note 6)
VCMPI1/2
VCMPI1/2 = 0.6V, VCMPO1/2 = 0.2V
VRT/SYNC = 0.36V E- & I-Grade
VRT/SYNC = 0.36V H-Grade
RRT/SYNC =0Ω
RRT/SYNC = 28k
RRT/SYNC =100k
150
450
600
80
115
150
–100
0
100
70
500
l 690
725
760
86
90
94
50
80
105
150
250
l 11.3
12
12.7
l 11.2
12
13
50
110
150
900
1000
1100
2.2
2.5
3.0
185
DIV Reference Current
CH1 DIV 2 Threshold
VDIV = 1V
RRT/SYNC = 0V
l 10.7
12
13.3
0.44
0.5
0.56
UNITS
V
µA
V
µA
µA
mA
µA
mV
mV
mV
nA
mV
V
mV
mV
µMho
µA
µA
V
V
µA
V
mA
mV
mV
mV
µA
mV
nA
nA
mV
%
mV
µA
µA
µA
kHz
kHz
MHz
Deg
µA
V
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