LT1761-1.8(RevA) Ver la hoja de datos (PDF) - Linear Technology
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LT1761-1.8 Datasheet PDF : 16 Pages
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TYPICAL PERFOR A CE CHARACTERISTICS
SHDN Pin Threshold
(Off-to-On)
1.0
0.9
0.8
IL = 100mA
0.7
0.6
IL = 1mA
0.5
0.4
0.3
0.2
0.1
0
–50 –25
0 25 50 75
TEMPERATURE (°C)
100 125
1761 G27
SHDN Pin Input Current
1.0
0.9
0.8
0.7
0.6
0.5
0.4
0.3
0.2
0.1
0
0 1 2 3 4 5 6 7 8 9 10
SHDN PIN VOLTAGE (V)
1761 G28
ADJ Pin Bias Current
100
90
80
70
60
50
40
30
20
10
0
–50 –25
0 25 50 75
TEMPERATURE (°C)
100 125
1761 G30
Reverse Output Current
100
TJ = 25°C
90 VIN = 0V
CURRENT FLOWS
80 INTO OUTPUT PIN
70 VOUT = VADJ
(LT1761-BYP, -SD)
60
LT1761-1.5
50
LT1761-1.8
LT1761-2
40
LT1761-2.5
30 LT1761-2.8
LT1761-3
20
LT1761-BYP
LT1761-SD
10
LT1761-3.3
LT1761-5
0
0 1 2 3 4 5 6 7 8 9 10
OUTPUT VOLTAGE (V)
1761 G33
Current Limit
350
VOUT = 0V
300 TJ = 25°C
250
200
150
100
50
0
01
2 34 5
INPUT VOLTAGE (V)
67
1761 G31
Reverse Output Current
25.0
VIN = 0V
22.5 VOUT = 1.22V (LT1761-BYP, -SD)
VOUT = 1.5V (LT1761-1.5)
20.0 VOUT = 1.8V (LT1761-1.8)
17.5
VOUT = 2V (LT1761-2)
VOUT = 2.5V (LT1761-2.5)
15.0
VOUT = 2.8V (LT1761-2.8)
VOUT = 3V (LT1761-3)
12.5 VOUT = 3.3V (LT1761-3.3)
VOUT = 5V (LT1761-5)
10.0
7.5
LT1761-BYP,-SD
5.0
2.5
0
–50 –25
LT1761-1.5,-1.8,-2,
-2.5,-2.8,-3,-3.3,-5
0 25 50 75 100 125
TEMPERATURE (°C)
1761 G34
LT1761 Series
SHDN Pin Input Current
1.4
VSHDN = 20V
1.2
1.0
0.8
0.6
0.4
0.2
0
–50 –25
0 25 50 75
TEMPERATURE (°C)
100 125
1761 G29
Current Limit
350
300
VIN = 7V
VOUT = 0V
250
200
150
100
50
0
–50 –25
0 25 50 75
TEMPERATURE (°C)
100 125
1761 G32
Input Ripple Rejection
80
70 LT1761-BYP
60 LT1761-5
IL = 100mA
VIN = VOUT(NOMINAL) +
1V + 50mVRMS RIPPLE
CBYP = 0
50
40
COUT = 10µF
30
20
COUT = 1µF
10
0
10
100
1k
10k 100k 1M
FREQUENCY (Hz)
1761 G35
9
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