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