Datasheet

8
LT1762 Series
1762fa
TYPICAL PERFORMANCE CHARACTERISTICS
UW
Ripple Rejection Load Regulation
LT1762
Minimum Input Voltage
TEMPERATURE (°C)
–50
RIPPLE REJECTION (dB)
100
1762 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
= 150mA
TEMPERATURE (°C)
–50
MINIMUM INPUT VOLTAGE (V)
0
50
75
1762 G38
–25
25
100
125
I
L
= 150mA
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
TEMPERATURE (°C)
–50
LOAD REGULATION (mV)
100
1762 G39
050–25 25 75 125
LT1762-2.5
5
0
–5
–10
–15
–20
–25
V
IN
= V
OUT(NOMINAL)
+ 1V
∆I
L
= 1mA TO 150mA
LT1762
LT1762-5
LT1762-3
LT1762-3.3
FREQUENCY (Hz)
10 1k 10k 100k
1762 G40
100
10
1
0.1
0.01
OUTPUT NOISE SPECTRAL DENSITY (µV/√Hz)
C
OUT
= 10µF
I
L
= 150mA
LT1762
LT1762-5
LT1762-2.5
LT1762-3
LT1762-3.3
FREQUENCY (Hz)
10 1k 10k 100k
1762 G41
100
10
1
0.1
0.01
OUTPUT NOISE SPECTRAL DENSITY (µV/√Hz)
LT1762
LT1762-5
C
BYP
= 1000pF
C
BYP
= 0.01µF
C
BYP
= 100pF
C
OUT
= 10µF
I
L
= 150mA
C
BYP
(pF)
10
OUTPUT NOISE (µV
RMS
)
160
140
120
100
80
60
40
20
0
100 1000 10000
1762 G42
C
OUT
= 10µF
I
L
= 150mA
f = 10Hz TO 100kHz
LT1762-5
LT1762-3.3
LT1762-3
LT1762
LT1762-2.5
LOAD CURRENT (mA)
0.01
OUTPUT NOISE (µV
RMS
)
160
140
120
100
80
60
40
20
0
0.1 1
1762 G43
10 100 1000
C
OUT
= 10µF
LT1762-5
LT1762-5
LT1762
LT1762
C
BYP
= 0
C
BYP
= 0.01µF
Output Noise Spectral Density
C
BYP
= 0 Output Noise Spectral Density
RMS Output Noise vs
Bypass Capacitor
RMS Output Noise vs
Load Current (10Hz to 100kHz)