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LT3668 датащи(PDF) 9 Page - Linear Technology

номер детали LT3668
подробное описание детали  40V 400mA Step-Down Switching Regulator with Dual Fault Protected Tracking LDOs
PDF  28 Pages
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производитель  LINER [Linear Technology]
домашняя страница  http://www.linear.com
Logo LINER - Linear Technology

LT3668 датащи(HTML) 9 Page - Linear Technology

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LT3668
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3668fa
For more information www.linear.com/LT3668
LDOs:
Minimum Input Voltage
LDOs:
Load Regulation
LDOs:
Output Noise Spectral Density
TEMPERATURE (°C)
–50
0.6
1.8
2.0
2.2
0
50
75 100
3667 G37
0.2
1.4
1.0
0.4
1.6
0
1.2
0.8
–25
25
125 150
IL = 200mA
VOUT2/3 = 1.1V
VIN1 = 5V
TEMPERATURE (°C)
–50
–10
–4
–5
–6
–7
–8
–9
–3
–2
–1
0
50
100
150
3668 G38
0
–25
25
75
125
∆IOUT2/3 = 1mA TO 200mA
VOUT2/3 = 1.1V
VIN2/3 = 2.2V
VIN1 = 12V
FREQUENCY (Hz)
10n
100n
10
1k
10k
1M
100k
3668 G39
1n
100
1µ
COUT2/3 = 10µF
VIN2/3 = 6V
VADJ2/3 = 5V
IOUT2/3 = 200mA
TYPICAL PERFORMANCE CHARACTERISTICS
LDOs:
RMS Output Noise
LDOs:
Small Signal Transfer Function
LDOs:
Transient Response
LDOs: External Current Limit,
REN/ILIM = 1.54k
LDOs: External Current Limit,
REN/ILIM = 6.19k
LDOs: External Current Limit,
REN/ILIM = 31.6k
TA = 25°C, unless otherwise noted.
LOAD CURRENT (mA)
20
40
50
70
80
0.01
1
10
100
3668 G40
0
0.1
60
30
10
COUT = 10µF
fOUT2/3 = 10Hz TO 100kHz
VIN2/3 = 6V
VADJ2/3 = 5V
FREQUENCY (Hz)
–20
–10
10
20
10
1k
10k
100k
1M
3668 G41
–40
100
0
–30
–180
–90
–45
45
–225
0
–135
COUT = 10µF
fOUT2/3 = 10Hz TO 100kHz
VIN2/3 = 6V
VADJ2/3 = 5V
IOUT2/3 = 200mA
IOUT2/3 = 20mA
PHASE
GAIN
3668 G42
100µs/DIV
VOUT2/3
50mV/DIV
IOUT2/3
100mA/DIV
IOUT3/2 = 20mA
VOUT3/2
1mV/DIV
VIN2/3 = 6V, VOUT2/3 = 5V
COUT2/3 = 10µF
IOUT2/3 = 20mA TO 200mA
TEMPERATURE (°C)
–50
190
200
150
3668 G43
180
170
0
50
100
–25
25
75
125
210
VOUT2/3 = 5V
185
195
175
205
VIN2/3 = 5.6V
VIN2/3 = 15V
VIN2/3 = 10V
TEMPERATURE (°C)
–50
50.0
51.0
150
3668 G44
49.0
48.0
0
50
100
–25
25
75
125
52.0
VOUT2/3 = 5V
49.5
50.5
48.5
51.5
VIN2/3 = 5.6V
VIN2/3 = 15V
VIN2/3 = 10V
TEMPERATURE (°C)
–50
9.8
9.9
10.0
10.1
10.2
–25
0
25
50
3668 G45
75 100 125 150
VOUT2/3 = 5V
VIN2/3 = 5.6V
VIN2/3 = 15V
VIN2/3 = 10V



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