LT1790 Ver la hoja de datos (PDF) - Linear Technology
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LT1790 Datasheet PDF : 24 Pages
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LT1790
5V ELECTRICAL CHARACTERISTICS The q denotes specifications that apply over the specified temperature
range, otherwise specifications are at TA = 25°C. CL = 1µF and VIN = 5.5V, unless otherwise noted.
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
q 4.99400
5
5.00600
V
q –0.120
0.120
%
LT1790AI
q 4.99125
5
5.00875
V
q –0.175
0.175
%
LT1790BC
q 4.98625
5
5.01375
V
q –0.275
0.275
%
LT1790BI
q 4.97938
5
5.02063
V
q –0.4125
0.4125
%
Output Voltage Temperature Coefficient (Note 5)
TMIN ≤ TA ≤ TMAX
LT1790A
LT1790B
q
5
10
ppm/°C
q
12
25
ppm/°C
Line Regulation
5.5V ≤ VIN ≤ 18V
50
170
ppm/V
q
220
ppm/V
Load Regulation (Note 6)
IOUT Source = 5mA
80
160
ppm/mA
q
250
ppm/mA
IOUT Sink = 3mA
70
110
ppm/mA
q
300
ppm/mA
Dropout Voltage (Note 7)
Supply Current
VIN – VOUT, ∆VOUT = 0.1%
IOUT = 0mA
q
IOUT Source = 5mA
q
IOUT Sink = 3mA
q
No Load
q
50
100
mV
120
mV
450
mV
250
mV
35
60
µA
80
µA
Minimum Operating Current—
Negative Output (See Figure 7)
VOUT = – 5V, 0.1%
100
125
µA
Turn-On Time
Output Noise (Note 8)
Long-Term Drift of Output Voltage (Note 9)
CLOAD = 1µF
0.1Hz ≤ f ≤ 10Hz
10Hz ≤ f ≤ 1kHz
700
µs
80
µVP-P
118
µVRMS
50
ppm/√kHr
Hysteresis (Note 10)
∆T = 0°C to 70°C
q
40
ppm
∆T = – 40°C to 85°C
q
100
ppm
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.
1790fa
9
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