Datasheet

9
LT1763 Series
1763fa
TYPICAL PERFORMANCE CHARACTERISTICS
UW
FREQUENCY (Hz)
10 1k 10k 100k
1763 G41
100
10
1
0.1
0.01
OUTPUT NOISE SPECTRAL DENSITY (µV/√Hz)
LT1763
LT1763-5
C
BYP
= 1000pF
C
BYP
= 0.01µF
C
BYP
= 100pF
C
OUT
= 10µF
I
L
= 500mA
C
BYP
(pF)
10
OUTPUT NOISE (µV
RMS
)
160
140
120
100
80
60
40
20
0
100 1000 10000
1763 G42
C
OUT
= 10µF
I
L
= 500mA
f = 10Hz TO 100kHz
LT1763-5
LT1763-3.3
LT1763
LT1763-1.5
LT1763-3
LT1763-2.5
LT1763-1.8
LOAD CURRENT (mA)
0.01
OUTPUT NOISE (µV
RMS
)
160
140
120
100
80
60
40
20
0
0.1 1
1763 G43
10 100 1000
C
OUT
= 10µF
LT1763-5
LT1763-5
LT1763
LT1763
C
BYP
= 0
C
BYP
= 0.01µF
Output Noise Spectral Density
RMS Output Noise vs
Bypass Capacitor
RMS Output Noise vs
Load Current (10Hz to 100kHz)
Input Ripple Rejection Input Ripple Rejection
FREQUENCY (Hz)
RIPPLE REJECTION (dB)
80
70
60
50
40
30
20
10
0
10 1k 10k 1M
1763 G35
100 100k
I
L
= 500mA
V
IN
= V
OUT(NOMINAL)
+
1V + 50mV
RMS
RIPPLE
C
BYP
= 0
C
OUT
= 4.7µF
C
OUT
= 10µF
FREQUENCY (Hz)
RIPPLE REJECTION (dB)
80
70
60
50
40
30
20
10
0
10 1k 10k 1M
1763 G36
100 100k
I
L
= 500mA
V
IN
= V
OUT(NOMINAL)
+
1V + 50mV
RMS
RIPPLE
C
OUT
= 10µF
C
BYP
= 0.01µF
C
BYP
= 100pF
C
BYP
= 1000pF
TEMPERATURE (°C)
–50
RIPPLE REJECTION (dB)
100
1763 G37
050
68
66
64
62
60
58
56
54
52
–25 25 75 125
V
IN
= V
OUT (NOMINAL)
+
1V + 0.5V
P-P
RIPPLE
AT f = 120Hz
I
L
= 500mA
TEMPERATURE (°C)
–50
MINIMUM INPUT VOLTAGE (V)
0
50
75
1763 G38
–25
25
100
125
2.50
2.25
2.00
1.75
1.50
1.25
1.00
0.75
0.50
0.25
0
I
L
= 1mA
V
OUT
= 1.22V
I
L
= 500mA
TEMPERATURE (°C)
–50
LOAD REGULATION (mV)
100
1763 G39
050–25 25 75 125
5
0
–5
–10
–15
–20
–25
V
IN
= V
OUT(NOMINAL)
+ 1V
∆I
L
= 1mA TO 500mA
LT1763
LT1763-5
LT1763-3
LT1763-3.3
LT1763-1.5
LT1763-1.8
LT1763-2.5
FREQUENCY (Hz)
10 1k 10k 100k
1763 G40
100
10
1
0.1
0.01
OUTPUT NOISE SPECTRAL DENSITY (µV/√Hz)
C
OUT
= 10µF
I
L
= 500mA
LT1763
LT1763-5
LT1763-1.5
LT1763-2.5
LT1763-1.8
LT1763-3.3
LT1763-3
Ripple Rejection
Load Regulation
LT1763
Minimum Input Voltage
Output Noise Spectral Density
C
BYP
= 0