LTC1798 Series

1

The LTC

LTC1798-5 are micropower bandgap references that com-

bine high accuracy and low drift with very low supply

current and small package size. The combination of ultralow

quiescent current and low dropout voltage of only 200mV

(max) makes them ideal for battery-powered equipment.

The output voltage is set by an external resistor divider for

the adjustable LTC1798.

This series of references uses curvature compensation to

obtain low temperature coefficient and trimmed thin-film

resistors to achieve high output accuracy. These refer-

ences can source up to 10mA and sink up to 2mA, making

them ideal for precision regulator applications. They are

stable without an output bypass capacitor, but are also

stable with capacitance up to 1

µF.Thisfeatureisimportant

in critical applications where PC board space is a premium

and fast settling is demanded.

The LTC1798 series references provided power dissipa-

tion advantages over shunt references. In addition to

supply current, shunt references must also idle the entire

load current to operate.

The LTC1798 series is available in the SO-8 package.

, LTC and LT are registered trademarks of Linear Technology Corporation.

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200mV Max Dropout at 10mA Output Current

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4

µA Typical Quiescent Current

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0.15% Max Initial Accuracy

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No Output Capacitor Required

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Output Sources 10mA, Sinks 2mA

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40ppm/

°C Max Drift

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Voltage Options: 2.5V, 3V, 4.1V, 5V and Adjustable

APPLICATIO S

FEATURES

DESCRIPTIO

TYPICAL APPLICATIO

Micropower Low

Dropout References

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Battery-Powered Systems

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Handheld Instruments

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Precision Power Supplies

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A/D and D/A Converters

2.5V Battery-Powered Reference

LTC1798-2.5 Temperature Drift

LTC1798-2.5

OUT

IN

GND

4

2

2.7V

TO 12.6V

6

2.5V

1798 TA01

0.1

µF

TEMPERATURE (

°C)

–40

–20

0

20

40

60

80

100

1798 TA02

4

3

2

1

–2

–1

–3

–4

0