LT1790 Linear Technology, LT1790 Datasheet - Page 4

• Manufacturer Part Number: LT1790
• Description: 2.5V Micropower SOT-23 Low Dropout Reference
• Manufacturer: Linear Technology

LT1790-2.5
TYPICAL PERFOR A CE CHARACTERISTICS
4
2.515
2.510
2.505
2.500
2.495
2.490
2.489
0
Line Regulation
2
4
INPUT VOLTAGE (V)
6
T
T
8
T
0.30
0.25
0.20
0.15
0.05
A
A
0.10
A
= 125 C
= –55 C
= 25 C
0
10
–4.0
0
– 2.5V Characteristics
Output Noise 0.1Hz to 10Hz
12
–3.5
1
OUTPUT TO GROUND VOLTAGE (V)
14
2
–3.0
W
16
3
–2.5
18
1790 G19
TIME (SEC)
U
4
20
–2.0
5
LT1790-2.5
T
T
T
–1.5
–V
A
A
A
6
4
= 25 C
= 125 C
= –55 C
EE
1, 2
R
5k
L
R1 10k
7
–1.0
–10
–20
–30
–40
–50
–60
–70
–80
20
10
0
6
8
100
Power Supply Rejection Ratio
vs Frequency
1 F
–0.5
C
3V
V
L
1790 G22
1790 G24
9
OUT
= 1 F
10
0
1k
FREQUENCY (Hz)
10k
100k
140
120
100
–20
–40
–60
10
80
60
40
20
8
6
4
2
0
0
10
0
Long-Term Drift
(Data Points Reduced After 500 Hr)
Output Voltage Noise Spectrum
C
T
2 TYPICAL PARTS SOLDERED TO PCB
1790 G20
L
A
= 1 F
= 30 C
1M
200
100
FREQUENCY (Hz)
I
O
1000
400
100
= 250 A
10
HOURS
1
I
100
O
Output Impedance vs Frequency
= 0 A
I
O
600
= 1mA
1k
C
L
= 4.7 F
I
O
800
= 100 A
1k
FREQUENCY (Hz)
1790 G25
1790 G23
C
1000
10k
L
= 0.47 F
C
L
10k
= 1 F
1790 G21
100k