Datasheet

5
LT1790
1790fa
PARAMETER CONDITIONS MIN TYP MAX UNITS
Output Voltage (Notes 3, 4) LT1790A 2.49875 2.5 2.50125 V
–0.05 0.05 %
LT1790B 2.4975 2.5 2.5025 V
–0.10 0.10 %
LT1790AC ● 2.4970 2.5 2.5030 V
● –0.120 0.120 %
LT1790AI ● 2.49563 2.5 2.50438 V
● –0.175 0.175 %
LT1790BC ● 2.49313 2.5 2.50688 V
● –0.275 0.275 %
LT1790BI ● 2.48969 2.5 2.51031 V
● –0.4125 0.4125 %
Output Voltage Temperature Coefficient (Note 5) T
MIN
≤ T
A
≤ T
MAX
LT1790A ● 5 10 ppm/°C
LT1790B ● 12 25 ppm/°C
Line Regulation 3V ≤ V
IN
≤ 18V 50 170 ppm/V
● 220 ppm/V
Load Regulation (Note 6) I
OUT
Source = 5mA 80 160 ppm/mA
● 250 ppm/mA
I
OUT
Sink = 3mA 70 110 ppm/mA
● 300 ppm/mA
Dropout Voltage (Note 7) V
IN
– V
OUT
, ∆V
OUT
= 0.1%
I
OUT
= 0mA 50 100 mV
● 120 mV
I
OUT
Source = 5mA ● 450 mV
I
OUT
Sink = 3mA ● 250 mV
Supply Current No Load 35 60 µA
● 80 µA
Minimum Operating Current— V
OUT
= –2.5V, 0.1% 100 125 µA
Negative Output (See Figure 7)
Turn-On Time C
LOAD
= 1µF 700 µs
Output Noise (Note 8) 0.1Hz ≤ f ≤ 10Hz 32 µV
P-P
10Hz ≤ f ≤ 1kHz 48 µV
RMS
Long-Term Drift of Output Voltage (Note 9) 50 ppm/√kHr
Hysteresis (Note 10) ∆T = 0°C to 70°C ● 40 ppm
∆T = –40°C to 85°C
● 100 ppm
The ● denotes specifications that apply over the specified
temperature range, otherwise specifications are at T
A
= 25°C. C
L
= 1µF and V
IN
= 3V, unless otherwise noted.
2.5V ELECTRICAL CHARACTERISTICS