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LT3694 Datasheet(PDF) 9 Page - Linear Technology

Part # LT3694
Description  40V 400mA Step-Down Switching Regulator with Dual Fault Protected LDOs
PDF  34 Pages
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Manufacturer  LINER [Linear Technology]
Direct Link  http://www.linear.com
Logo LINER - Linear Technology

LT3694 Datasheet(HTML) 9 Page - Linear Technology

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LT3667
9
3667fb
For more information www.linear.com/LT3667
TYPICAL PERFORMANCE CHARACTERISTICS
FB2, FB3 Pin Bias Current
LDOs:
Internal Current Limit
LDOs:
Internal Current Limit
LDOs:
Reverse Output Current
LDOs:
Reverse Output Current
LDOs:
Input Ripple Rejection
TA = 25°C, unless otherwise noted.
LDOs:
Minimum Input Voltage
LDOs:
Load Regulation
LDOs:
Output Noise Spectral Density
TEMPERATURE (°C)
–50
3
4
5
25
75
150
3667 G28
2
1
0
–25
0
50
100
FB3
FB2
125
TEMPERATURE (°C)
–50
0.6
1.8
2.0
2.2
0
50
75 100
3667 G34
0.2
1.4
1.0
0.4
1.6
0
1.2
0.8
–25
25
125 150
IL = 200mA
VOUT2/3 = 0.8V
VIN1 = 5V
INPUT/OUTPUT DIFFERENTIAL (V)
0
0
50
150
200
250
350
5
25
35
3667 G29
100
300
20
45
10 15
30
40
TA = 140°C
TA = 125°C
TA = 25°C
TA = –50°C
OUTPUT VOLTAGE (V)
0
200
225
250
275
325
5
25
35
3667 G30
300
20
45
10 15
30
40
TA = 140°C
TA = 125°C
TA = 25°C
TA = –50°C
VIN2/3-VOUT2/3(NOMINAL) = 1V
VOUT2/3 (V)
0
0
0.1
0.3
0.4
0.5
1.0
0.7
10
20 25
45
3667 G31
0.2
0.8
0.9
0.6
5
15
30 35 40
ALL PINS GROUNDED
EXCEPT FOR OUT2/3
TEMPERATURE (°C)
–50
0
5
15
20
25
50
35
0
50
75
150
3667 G32
10
40
45
30
–25
25
100 125
VOUT2/3 = VFB2/3 = 2V
VIN2/3 = 0V
IFB2/3
IOUT2/3
FREQUENCY (Hz)
10
100
30
40
50
60
70
1k
10k
100k
1M
10M
3667 G33
20
10
0
80
90
IOUT2/3 = 200mA
VOUT2/3 = 5V
VIN2/3 = 5.8V + 50mVRMS RIPPLE
OUT3 (VIN1 = 12V)
OUT2
(VIN1 = 12V)
TEMPERATURE (°C)
–50
–5
–4
–3
–2
–1
0
50
100
150
3667 G35
0
1
–25
25
75
125
∆IOUT2/3 = 1mA TO 200mA
VOUT2/3 = 0.8V
VIN2/3 = 2.2V
VIN1 = 5V
FREQUENCY (Hz)
0.1
1
10
1k
10k
100k
3667 G36
0.01
100
10
VOUT2/3 = 5V
VOUT2/3 = 3.3V
VOUT2/3 = 2.5V
VOUT2/3 = 1.8V
VOUT2/3 = 1.5V
VOUT2/3 = 1.2V
VOUT2/3 = 0.8V
COUT = 10µF
IL = 200mA



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