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