LT1963ET View Datasheet(PDF) - Linear Technology
Part Name
Description
Manufacturer
LT1963ET Datasheet PDF : 20 Pages
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LT1963 Series
TYPICAL PERFOR A CE CHARACTERISTICS
SHDN Pin Input Current
5.0
4.5
4.0
3.5
3.0
2.5
2.0
1.5
1.0
0.5
0
0 2 4 6 8 10 12 14 16 18 20
SHDN PIN VOLTAGE (V)
1963 G24
Current Limit
3.0
2.5
TJ = 25°C
2.0
TJ = – 50°C
TJ = 125°C
1.5
1.0
0.5
∆VOUT = 100mV
0
0 2 4 6 8 10 12 14 16 18 20
INPUT/OUTPUT DIFFERENTIAL (V)
1963 G27
Reverse Output Current
1.0
VIN = 0V
0.9 VOUT = 1.21V (LT1963)
0.8
VOUT = 1.5V (LT1963-1.5)
VOUT = 1.8V (LT1963-1.8)
0.7 VOUT = 2.5V (LT1963-2.5)
VOUT = 3.3V (LT1963-3.3)
0.6
LT1963-1.5/-1.8/-2.5/-3.3
0.5
0.4
0.3
LT1963
0.2
0.1
0
–50 –25
0 25 50 75
TEMPERATURE (°C)
100 125
1963 G30
8
SHDN Pin Input Current
7
VSHDN = 20V
6
5
4
3
2
1
0
–50 –25
0 25 50 75
TEMPERATURE (°C)
100 125
1963 G25
Current Limit
4.0
VIN = 7V
3.5 VOUT = 0V
3.0
2.5
2.0
1.5
1.0
0.5
0
–50 –25
0 25 50 75
TEMPERATURE (°C)
100 125
1963 G28
Ripple Rejection
80
70
60
50
40
COUT = 100µF TANTALUM
30
+10 × 1µF CERAMIC
20
COUT = 10µF TANTALUM
10 IL = 0.75A
VIN = VOUT(NOMINAL) +1V + 50mVRMS RIPPLE
0
10
100
1k
10k 100k 1M
FREQUENCY (Hz)
1963 G31
ADJ Pin Bias Current
5.0
4.5
4.0
3.5
3.0
2.5
2.0
1.5
1.0
0.5
0
–50 –25
0 25 50 75
TEMPERATURE (°C)
100 125
1963 G26
Reverse Output Current
5.0
TJ = 25°C
4.5 VIN = 0V
4.0 LT1963-1.5
3.5 LT1963-1.8
3.0
LT1963
2.5
2.0
LT1963-3.3
1.5
LT1963-2.5
1.0
0.5
0
01234567 8
OUTPUT VOLTAGE (V)
CURRENT FLOWS INTO OUTPUT PIN
VOUT = VADJ (LT1963)
VOUT = VFB (LT1963-1.5/-1.8/-2.5/-3.3)
9 10
1963 G29
Ripple Rejection
76
74
72
70
68
66
64 IL = 0.75A
VIN = VOUT(NOMINAL) +1V + 0.5VP-P
62 RIPPLE AT f = 120Hz
– 50 – 25 0 25 50 75 100 125
TEMPERATURE (°C)
1963 G32
1963fc
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