Initial accuracy does not include shift due to solder heat effect (see the Applications Information section).
Line and load regulation specifications include the effect of self-heating.
3
Long-term stability specification is noncumulative. The drift in subsequent 1000-hour periods is significantly lower than in the first 1000-hour period.
Rev. L | Page 4 of 28
Data Sheet
ELECTRICAL CHARACTERISTICS—REF191 @ −40°C ≤ +85°C
@ V
S
= 3.3 V, −40°C ≤ T
A
≤ +85°C, unless otherwise noted.
Table 3.
Parameter
TEMPERATURE COEFFICIENT
1, 2
E Grade
F Grade
G Grade
3
LINE REGULATION
4
E Grade
F and G Grades
LOAD REGULATION
4
E Grade
F and G Grades
DROPOUT VOLTAGE
Symbol
TCV
O
/°C
Condition
I
OUT
= 0 mA
Min
Typ
2
5
10
5
10
5
10
REF19x Series
Max
5
10
25
10
20
15
20
0.95
1.25
1.55
Unit
ppm/°C
ppm/°C
ppm/°C
ppm/V
ppm/V
ppm/mA
ppm/mA
V
V
V
V
μA
V
μA
μA
μA
ΔV
O
/ΔV
IN
3.0 V ≤ V
S
≤ 15 V, I
OUT
= 0 mA
ΔV
O
/ΔV
LOAD
V
S
= 5.0 V, 0 mA ≤ I
OUT
≤ 25 mA
V
S
− V
O
V
S
= 3.0 V, I
LOAD
= 2 mA
V
S
= 3.3 V, I
LOAD
= 10 mA
V
S
= 3.6 V, I
LOAD
= 25 mA
2.4
−8
0.8
−8
45
15
SLEEP PIN
Logic High Input Voltage
Logic High Input Current
Logic Low Input Voltage
Logic Low Input Current
SUPPLY CURRENT
Sleep Mode
1
2
V
H
I
H
V
L
I
L
No load
No load
For proper operation, a 1 μF capacitor is required between the output pin and the GND pin of the device.
TCV
O
is defined as the ratio of output change with temperature variation to the specified temperature range expressed in ppm/°C.
TCV
O
=
(V
MAX
−
V
MIN
)/V
O
(T
MAX
−
T
MIN
)
3
Guaranteed by characterization.
4
Line and load regulation specifications include the effect of self-heating.
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