Datasheet

9
LT1963 Series
1963fc
TEMPERATURE (°C)
–50
MINIMUM INPUT VOLTAGE (V)
3.0
2.5
2.0
1.5
1.0
0.5
0
25 75
1963 G33
–25 0
50 100 125
I
L
= 1.5A
I
L
= 500mA
I
L
= 100mA
TEMPERATURE (°C)
–50
LOAD REGULATION (mV)
10
5
0
–5
–10
–15
–20
25 75
1963 G34
–25 0
50 100 125
LT1963
LT1963-3.3
LT1963-2.5
V
IN
= V
OUT(NOMINAL)
+1V
(LT1963-1.5/-1.8/-2.5/-3.3)
V
IN
= 2.7V (LT1963)
∆I
L
= 1mA TO 1.5A
LT1963-1.5
LT1963-1.8
FREQUENCY (Hz)
10
0.01
OUTPUT NOISE SPECTRAL DENSITY (µV/√Hz)
0.1
1.0
1k 100k
1963 G35
100 10k
C
OUT
= 10µF
I
L
=1.5A
LT1963-3.3
LT1963-2.5
LT1963
LT1963-1.5
LT1963-1.8
LOAD CURRENT (A)
OUTPUT NOISE VOLTAGE (µV
RMS
)
50
45
40
35
30
25
20
15
10
5
0
0.0001 0.01 0.1 10
1063 G36
0.001 1
C
OUT
= 10µF
LT1963-3.3
LT1963-2.5
LT1963-1.8
LT1963-1.5
LT1963
V
OUT
100µV/DIV
1ms/DIV
C
OUT
= 10µF
I
LOAD
= 1.5A
1963 G37
LT1963 Minimum Input Voltage
Load Regulation
Output Noise Spectral Density
RMS Output Noise vs Load
Current (10Hz to 100kHz)
LT1963-3.3 10Hz to 100kHz Output Noise
TIME (µs)
200
150
100
50
0
–50
–100
0.6
0.4
0.2
0
OUTPUT VOLTAGE
DEVIATION (mV)
1963 G38
0246
8
10
12 14 16 18 20
V
IN
= 4.3V
C
IN
= 3.3µF TANTALUM
C
OUT
= 10µF TANTALUM
LOAD
CURRENT (A)
TIME (µs)
150
100
50
0
–50
–100
–150
1.5
1.0
0.5
0
OUTPUT VOLTAGE
DEVIATION (mV)
LOAD
CURRENT (A)
1963 G39
0 50 100 150
250
300
350 400 450 500200
V
IN
= 4.3V
C
IN
= 33µF TANTALUM
C
OUT
= 100µF TANTALUM
+10 × 1µF CERAMIC
LT1963-3.3 Transient Response
LT1963-3.3 Transient Response
TYPICAL PERFOR A CE CHARACTERISTICS
UW