LT1790BIS6-1.25#PBF Linear Technology, LT1790BIS6-1.25#PBF Datasheet - Page 12

• Manufacturer Part Number: LT1790BIS6-1.25#PBF
• Manufacturer: Linear Technology

Specifications of LT1790BIS6-1.25#PBF

• Fixed / Adjust / Prog: Precision
• Output Voltage (max): 1.25V
• Temperature Coefficient: 25ppm/°C
• Reference Voltage Accuracy (max): 0.1
• Line Regulation: 170ppm/V
• Load Regulation: 180ppm/mA
• Input Voltage (max): 20V
• Operating Temp Range: -40C to 85C
• Operating Temperature Classification: Industrial
• Mounting: Surface Mount
• Pin Count: 6
• Package Type: TSOT-23
• Lead Free Status / RoHS Status: Compliant

LT1790
1.25V TYPICAL PERFORMANCE 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.
12
1.285
1.280
1.275
1.270
1.265
1.260
1.245
1.240
1.235
1.230
1.225
1.255
1.250
0.30
0.25
0.20
0.15
0.10
0.05
0
–2.5
0
– 1.25V Characteristics
Line Regulation
LT1790-1.25
2
1
–V
4
OUTPUT TO GROUND VOLTAGE (V)
EE
–2.0
2
R
5k
4
R1 10k
L
6
6
INPUT VOLTAGE (V)
1μF
–1.5
4.5
4.0
3.5
3.0
2.0
1.0
0.5
5.0
2.5
1.5
3V
V
8
0
OUT
10
T
T
Output Voltage Noise Spectrum
T
A
A
A
10
C
= 125°C
= –55°C
L
= 25°C
= 1μF
–1.0
12
14
T
T
T
A
A
A
100
–0.5
= 25°C
= 125°C
= –55°C
FREQUENCY (Hz)
16
17901.25. G07
17091.25 G10
18
I
O
20
= 250μA
0
I
I
O
O
= 0μA
= 100μA
I
O
1k
= 1mA
140
120
100
–20
–40
–60
–10
–20
–30
–40
–50
–60
–70
–80
–90
80
60
40
20
10
17901.25 G13
0
0
100
0
Power Supply Rejection Ratio
vs Frequency
Long-Term Drift
(Data Points Reduced After 500 Hr)
LT1790S6-1.25V
2 TYPICAL PARTS SOLDERED TO PCB
T
V
C
A
IN
L
10k
= 30°C
= 1μF
= 3V
200
1k
FREQUENCY (Hz)
400
HOURS
10k
600
100
10
1
100k
10
Integrated Noise 10Hz to 1kHz
800
17901.25 G11
17901.25 G08
1000
1M
FREQUENCY (Hz)
100
100
500
10
1
0
100
0
Output Impedance vs Frequency
Output Noise 0.1Hz to 10Hz
V
IN
1
= 3V
2
17901.25 G14
3
C
1k
FREQUENCY (Hz)
L
C
1000
L
= 4.7μF
TIME (SEC)
4
= 1μF
5
6
10k
C
7
L
= 0.47μF
8
17901.25 G09
17901.25 G12
9
1790fb
100k
10