LT3667 View Datasheet(PDF) - Linear Technology
Part Name
Description
Manufacturer
LT3667 Datasheet PDF : 34 Pages
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LT3667
TYPICAL PERFORMANCE CHARACTERISTICS TA = 25°C, unless otherwise noted.
FB2, FB3 Pin Bias Current
5
4
3
FB3
FB2
2
1
0
–50 –25
0 25 50 75 100 125 150
TEMPERATURE (°C)
3667 G28
LDOs:
Reverse Output Current
1.0
ALL PINS GROUNDED
0.9 EXCEPT FOR OUT2/3
0.8
0.7
0.6
0.5
0.4
0.3
0.2
0.1
0
0 5 10 15 20 25 30 35 40 45
VOUT2/3 (V)
3667 G31
LDOs:
Minimum Input Voltage
2.2
2.0
1.8
1.6
1.4
1.2
1.0
0.8
0.6
0.4
0.2
0
–50 –25
IL = 200mA
VOUT2/3 = 0.8V
VIN1 = 5V
0 25 50 75 100 125 150
TEMPERATURE (°C)
3667 G34
LDOs:
Internal Current Limit
350
300
250
200
150
100
50
0
0
TA = 140°C
TA = 125°C
TA = 25°C
TA = –50°C
5 10 15 20 25 30 35 40 45
INPUT/OUTPUT DIFFERENTIAL (V)
3667 G29
LDOs:
Reverse Output Current
50
45
VOUT2/3 = VFB2/3 = 2V
VIN2/3 = 0V
40
35
30
25
20
IFB2/3
15
10
IOUT2/3
5
0
–50 –25 0 25 50 75 100 125 150
TEMPERATURE (°C)
3667 G32
LDOs:
Load Regulation
1
0
–1
–2
–3
∆IOUT2/3 = 1mA TO 200mA
–4 VOUT2/3 = 0.8V
VIN2/3 = 2.2V
VIN1 = 5V
–5
–50 –25 0 25 50 75 100 125 150
TEMPERATURE (°C)
3667 G35
For more information www.linear.com/LT3667
LDOs:
Internal Current Limit
325
VIN2/3-VOUT2/3(NOMINAL) = 1V
300
275
250
225
200
0
TA = 140°C
TA = 125°C
TA = 25°C
TA = –50°C
5 10 15 20 25 30 35 40 45
OUTPUT VOLTAGE (V)
3667 G30
LDOs:
Input Ripple Rejection
90
80
OUT3 (VIN1 = 12V)
70
60
OUT2
50 (VIN1 = 12V)
40
30
20
IOUT2/3 = 200mA
10 VOUT2/3 = 5V
VIN2/3 = 5.8V + 50mVRMS RIPPLE
0
10 100 1k 10k 100k
FREQUENCY (Hz)
1M 10M
3667 G33
LDOs:
Output Noise Spectral Density
10
1
0.1
0.01
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
100
1k
10k
FREQUENCY (Hz)
100k
3667 G36
3667fb
9
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