Datasheet

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