LT1963 Series
TYPICAL PERFOR A CE CHARACTERISTICS
U W
LT1963 Minimum Input Voltage
Load Regulation
Output Noise Spectral Density
3.0
2.5
2.0
1.5
1.0
0.5
0
10
5
1.0
0.1
C
L
= 10µF
OUT
=1.5A
I
I
L
= 1.5A
LT1963-1.8
LT1963
I
= 500mA
L
0
LT1963-2.5
LT1963-3.3
I
= 100mA
L
–5
–10
–15
–20
LT1963-2.5
LT1963-3.3
LT1963
V
V
= V
+1V
OUT(NOMINAL)
IN
LT1963-1.8
(LT1963-1.8/-2.5/-3.3)
= 2.7V (LT1963)
IN
L
∆I = 1mA TO 1.5A
0.01
50
TEMPERATURE (°C)
100 125
–50 –25
0
25
75
50
TEMPERATURE (°C)
100 125
–50 –25
0
25
75
10
100
1k
10k
100k
FREQUENCY (Hz)
1963 G35
1963 G33
1963 G34
RMS Output Noise vs Load
Current (10Hz to 100kHz)
LT1963-3.3 10Hz to 100kHz Output Noise
50
45
40
35
30
25
20
15
10
5
C
OUT
= 10µF
LT1963-3.3
LT1963-2.5
LT1963-1.8
LT1963
V
OUT
100µV/DIV
0
1963 G37
0.0001 0.001
0.01
0.1
1
10
C
LOAD
= 10µF
= 1.5A
1ms/DIV
OUT
I
LOAD CURRENT (A)
1063 G36
LT1963-3.3 Transient Response
LT1963-3.3 Transient Response
200
150
100
50
150
100
50
V
C
C
= 4.3V
IN
IN
= 3.3µF TANTALUM
= 10µF TANTALUM
OUT
0
0
–50
–100
–150
1.5
1.0
0.5
0
–50
–100
0.6
0.4
0.2
0
V
C
C
= 4.3V
IN
IN
= 33µF TANTALUM
= 100µF TANTALUM
OUT
+10 × 1µF CERAMIC
8
250
300
0
2
4
6
10 12 14 16 18 20
0
50 100 150 200
350 400 450 500
TIME (µs)
TIME (µs)
1963 G38
1963 G39
1963fa
8
Linear Systems [ Linear Systems ]
