LT1790
Micropower SOT-23
Low Dropout Reference Family
FEATURES DESCRIPTION
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High Accuracy: The LT 1790 is a family of SOT-23 micropower low dropout
A Grade0.05% Max series references that combine high accuracy and low drift
B Grade0.1% Max with low power dissipation and small package size. These
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Low Drift: micropower references use curvature compensation to
A Grade10ppm/C Max obtain a low temperature coefficient and trimmed preci-
B Grade25ppm/C Max sion thin-film resistors to achieve high output accuracy. In
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Low Thermal Hysteresis 40ppm (Typical) 40C to 85C addition, each LT1790 is post-package trimmed to greatly
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Low Supply Current: 60A Max reduce the temperature coefficient and increase the output
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Sinks and Sources Current accuracy. Output accuracy is further assured by excellent
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Low Dropout Voltage line and load regulation. Special care has been taken to
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Guaranteed Operational 40C to 125C minimize thermally induced hysteresis.
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Wide Supply Range to 18V
The LT1790s are ideally suited for battery-operated
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Available Output Voltage Options: 1.25V, 2.048V,
systems because of their small size, low supply current
2.5V, 3V, 3.3V, 4.096V and 5V
and reduced dropout voltage. These references provide
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Low Profile (1mm) ThinSOT Package
supply current and power dissipation advantages over
shunt references that must idle the entire load current to
operate. Since the LT1790 can also sink current, it can
APPLICATIONS
operate as a micropower negative voltage reference with
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Handheld Instruments
the same performance as a positive reference.
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Negative Voltage References
L, LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks of Linear
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Industrial Control Systems
Technology Corporation. ThinSOT is a trademark of Linear Technology Corporation.
All other trademarks are the property of their respective owners.
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Data Acquisition Systems
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Battery-Operated Equipment
TYPICAL APPLICATION
Positive Connection for LT1790-2.5 Typical V Distribution for LT1790-2.5
OUT
50
167 UNITS
4 6
45
2.6V V 18V LT1790-2.5 V = 2.5V
OUT
IN
40
0.1F 1F LT1790B LIMITS
1, 2
35
LT1790A LIMITS
1790 TA01
30
25
20
15
10
5
0
2.498 2.499 2.500 2.501 2.502
OUTPUT VOLTAGE (V)
1790 TA02
1790fc
1
For more information www.linear.com/LT1790
NUMBER OF UNITSLT1790
ABSOLUTE MAXIMUM RATINGS PIN CONFIGURATION
(Note 1)
TOP VIEW
Input Voltage .............................................................20V
Specified Temperature Range
GND 1 6 V
OUT
GND 2 5 DNC*
Commercial ............................................ 0C to 70C
DNC* 3 4 V
IN
Industrial .............................................40C to 85C
Output Short-Circuit Duration .......................... Indefinite
S6 PACKAGE
6-LEAD PLASTIC TSOT-23
Operating Temperature Range
T = 150C, = 230C/W
JMAX JA
(Note 2) .................................................. 40C to 125C
Storage Temperature Range *DNC: DO NOT CONNECT
(Note 3) .................................................. 65C to 150C
Lead Temperature (Soldering, 10 sec) ...................300C