Datasheet

LT1963A Series
11
1963aff
For more information www.linear.com/LT1963A
Typical perForMance characTerisTics
FREQUENCY (Hz)
RIPPLE REJECTION (dB)
80
70
60
50
40
30
20
10
0
10 1k 10k 1M
1963A G31
100 100k
C
OUT
= 10µF TANTALUM
C
OUT
= 100µF TANTALUM
+10 × 1µF CERAMIC
I
L
= 0.75A
V
IN
= V
OUT(NOMINAL)
+1V + 50mV
RMS
RIPPLE
TEMPERATURE (°C)
–50
76
74
72
70
68
66
64
62
25 75
1963A G32
–25 0
50 100 125
RIPPLE REJECTION (dB)
I
L
= 0.75A
V
IN
= V
OUT(NOMINAL)
+1V + 0.5V
P-P
RIPPLE AT f = 120Hz
Ripple Rejection
Ripple Rejection
TEMPERATURE (°C)
–50
MINIMUM INPUT VOLTAGE (V)
3.0
2.5
2.0
1.5
1.0
0.5
0
25 75
1963A G33
–25 0
50 100 125
I
L
= 1.5A
I
L
= 500mA
I
L
= 100mA
LT1963A Minimum Input Voltage
TEMPERATURE (°C)
–50
LOAD REGULATION (mV)
10
5
0
–5
–10
–15
–20
25 75
1963A G34
–25 0
50 100 125
LT1963A
LT1963A-3.3
LT1963A-1.8
LT1963A-2.5
LT1963A-1.5
V
IN
= V
OUT(NOMINAL)
+1V
(LT1963A-1.8/-2.5/-3.3)
V
IN
= 2.7V (LT1963A/LT1963A-1.5)
ΔI
L
= 1mA TO 1.5A
FREQUENCY (Hz)
0.01
OUTPUT NOISE SPECTRAL DENSITY (µV/√Hz)
0.1
10 100 1k 10k 100k
1.0
1963A G35
C
OUT
= 10µF
I
L
=1.5A
LT1963A-3.3
LT1963A-2.5
LT1963A-1.8
LT1963A
LT1963A-1.5
Load Regulation
Output Noise Spectral Density
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
1963A G36
0.001 1
C
OUT
= 10µF
LT1963A-3.3
LT1963A-2.5
LT1963A-1.8
LT1963A-1.5
LT1963A
V
OUT
100µV/DIV
1ms/DIV
C
OUT
= 10µF
I
LOAD
= 1.5A
1963A G37
RMS Output Noise vs Load
Current (10Hz to 100kHz)
LT1963A-3.3 10Hz to 100kHz Output Noise
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