lt1790ais6-5 Linear Technology Corporation, lt1790ais6-5 Datasheet - Page 11

• Manufacturer Part Number: lt1790ais6-5
• Description: Micropower Sot-23 Low Dropout Reference Family
• Manufacturer: Linear Technology Corporation

1.25V TYPICAL PERFOR A CE CHARACTERISTICS
Each of the voltage options have similar performance curves. For the 3V, 3.3V and the 4.096V options,
the curves can be estimated based on the 2.5V and 5V curves.
1.285
1.280
1.275
1.270
1.265
1.260
1.235
1.230
1.255
1.250
1.245
1.240
1.225
0.30
0.25
0.20
0.15
0.10
0.05
0
–2.5
0
Line Regulation
– 1.25V Characteristics
LT1790-1.25
2
1
–V
4
OUTPUT TO GROUND VOLTAGE (V)
–2.0
EE
2
R
5k
4
R1 10k
L
6
INPUT VOLTAGE (V)
6
1 F
–1.5
5.0
4.5
4.0
3.5
3.0
2.5
2.0
1.5
1.0
0.5
3V
V
8
0
OUT
T
10
T
T
Output Voltage Noise Spectrum
A
A
A
10
C
= 125 C
= –55 C
= 25 C
L
= 1 F
–1.0
12
14
T
T
T
A
A
A
–0.5
100
= 25 C
= 125 C
= –55 C
16
FREQUENCY (Hz)
17901.25. G07
17091.25 G10
18
I
O
20
= 250 A
I
0
I
O
O
= 0 A
= 100 A
W
I
O
1k
= 1mA
–10
–20
–30
–40
–50
–60
–70
–80
–90
–20
–40
–60
140
120
100
U
17901.25 G13
10
80
60
40
20
0
0
100
0
Long-Term Drift
(Data Points Reduced After 500 Hr)
Power Supply Rejection Ratio
vs Frequency
V
C
LT1790S6-1.25V
2 TYPICAL PARTS SOLDERED TO PCB
T
IN
L
A
10k
= 1 F
= 30 C
= 3V
200
1k
FREQUENCY (Hz)
400
HOURS
10k
600
100k
100
800
10
1
10
17901.25 G08
17901.25 G10
Integrated Noise 10Hz to 1kHz
1000
1M
FREQUENCY (Hz)
100
500
10
1
0
100
100
0
Output Impedance vs Frequency
Output Noise 0.1Hz to 10Hz
V
IN
1
= 3V
2
C
3
1k
FREQUENCY (Hz)
L
C
L
= 4.7 F
LT1790 G01
= 1 F
TIME (SEC)
4
1000
5
6
10k
LT1790
C
7
L
= 0.47 F
8
11
17901.25 G09
17901.2 G12
9
1790fa
100k
10