Datasheet

9
LT1790
1790fa
PARAMETER CONDITIONS MIN TYP MAX UNITS
Output Voltage (Notes 3, 4) LT1790A 4.9975 5 5.0025 V
–0.05 0.05 %
LT1790B 4.995 5 5.005 V
–0.10 0.10 %
LT1790AC ● 4.99400 5 5.00600 V
● –0.120 0.120 %
LT1790AI ● 4.99125 5 5.00875 V
● –0.175 0.175 %
LT1790BC ● 4.98625 5 5.01375 V
● –0.275 0.275 %
LT1790BI ● 4.97938 5 5.02063 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 5.5V ≤ 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
= –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 80 µV
P-P
10Hz ≤ f ≤ 1kHz 118 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
= 5.5V, unless otherwise noted.
5V ELECTRICAL CHARACTERISTICS
Note 1: Absolute Maximum Ratings are those values beyond which the life
of the device may be impaired.
Note 2: The LT1790 is guaranteed functional over the operating
temperature range of –40°C to 125°C. The LT1790-1.25 at 125°C is
typically less than 2% above the nominal voltage. The other voltage
options are typically less than 0.25% above their nominal voltage.
Note 3: If the part is stored outside of the specified temperature range, the
output voltage may shift due to hysteresis.
Note 4: ESD (Electrostatic Discharge) sensitive device. Extensive use of
ESD protection devices are used internal to the LT1790, however, high
electrostatic discharge can damage or degrade the device. Use proper ESD
handling precautions.
Note 5: Temperature coefficient is measured by dividing the change in
output voltage by the specified temperature range. Incremental slope is
also measured at 25°C.
Note 6: Load regulation is measured on a pulse basis from no load to the
specified load current. Output changes due to die temperature change
must be taken into account separately.
Note 7: Excludes load regulation errors.
Note 8: Peak-to-peak noise is measured with a single pole highpass filter
at 0.1Hz and a 2-pole lowpass filter at 10Hz. The unit is enclosed in a still
air environment to eliminate thermocouple effects on the leads. The test
time is 10 seconds. Integrated RMS noise is measured from 10Hz to 1kHz
with the HP3561A analyzer.