LT1962 Series
U W
TYPICAL PERFOR A CE CHARACTERISTICS
Input Ripple Rejection
Input Ripple Rejection
Ripple Rejection
80
70
60
50
40
30
20
10
0
80
70
60
50
40
30
20
10
0
68
I
= 300mA
C
= 0.01µF
L
BYP
V
= V
+ 1V
IN
OUT(NOMINAL)
66
64
+ 50mV
C
RIPPLE
RMS
= 0
C
= 1000pF
BYP
BYP
C
= 10µF
62
60
58
56
54
OUT
C
= 100pF
BYP
C
= 3.3µF
OUT
I
= 300mA
= V
L
IN
V
+ 1V
OUT(NOMINAL)
I
= 300mA
L
V
+ 50mV
C
RIPPLE
= V
+ 1V
RMS
IN
OUT(NOMINAL)
= 10µF
+ 0.5V RIPPLE AT f = 120Hz
OUT
P-P
52
10
100
1k
10k
100k
1M
10
100
1k
10k
100k
1M
–25
0
50
75 100 125
–50
25
FREQUENCY (Hz)
FREQUENCY (Hz)
TEMPERATURE (°C)
1962 G43
1962 G44
1962 G45
LT1962 Minimum Input Voltage
Load Regulation
Output Noise Spectral Density
10
1
2.50
2.25
2.00
1.75
1.50
1.25
1.00
0.75
0.50
0.25
0
5
0
I
C
C
= 300mA
V
OUT
= 1.22V
L
= 10µF
OUT
BYP
LT1962-1.8
LT1962
= 0
LT1962-1.5
LT1962-3
LT1962-3.3
I
L
= 300mA
LT1962-5
–5
–10
I
L
= 1mA
LT1962-3.3
LT1962-3
LT1962-2.5
LT1962
LT1962-2.5
LT1962-5
0.1
0.01
–15
–20
–25
LT1962-1.8
LT1962-1.5
V
= V
+ 1V
IN
L
OUT(NOMINAL)
∆I = 1mA TO 300mA
–50
0
25
50
75 100 125
–50 –25
0
25
50
75
100 125
–25
10
100
1k
10k
100k
TEMPERATURE (°C)
FREQUENCY (Hz)
TEMPERATURE (°C)
1962 G48
1962 G46
1962 G47
RMS Output Noise
vs Bypass Capacitor
RMS Output Noise
vs Load Current (10Hz to 100kHz)
Output Noise Spectral Density
10
1
160
140
120
100
80
160
140
120
100
80
I
= 300mA
OUT
C
OUT
= 10µF
I
= 300mA
OUT
L
L
C
= 10µF
C
BYP
C
BYP
= 0µF
C
= 10µF
= 0.01µF
f = 10Hz to 100kHz
LT1962-5
LT1962-5
LT1962
C
= 1000pF
BYP
LT1962-5
LT1962-3
LT1962-3.3
LT1962-2.5
LT1962-1.8
LT1962-1.5
C
= 100pF
BYP
60
60
C
= 0.01µF
LT1962
BYP
0.1
0.01
40
40
LT1962
LT1962-5
20
20
LT1962
100
0
0
0.01
0.1
1
10
1000
10
100
1k
10k
10
100
1k
FREQUENCY (Hz)
10k
100k
LOAD CURRENT (mA)
C
BYP
(pF)
1962 G51
1962 G49
1962 G50
9
Linear [ Linear ]
