LINEAR LTC1798 Series Data Sheet User Guide
Summary
The LTC1798 series provides ultra-low dropout, micropower bandgap references ideal for portable and battery-powered systems. These high-accuracy voltage sources feature low drift and minimal quiescent current while requiring no output capacitor. The comprehensive manual details the product's electrical characteristics, performance specifications (including load and line regulation), temperature coefficients, and guidelines for integration in critical applications like precision power supplies and handheld instruments.
Page 1 Text Content
LTC1798 Series Micropower Low Dropout References
FEATURES DESCRIPTIO
200m V Max Dropout at 10m A Output Current The LTC®1798/LTC1798-2.5/LTC1798-3/LTC1798-4.1/ 4µA Typical Quiescent Current LTC1798-5 are micropower bandgap references that com- 0.15% Max Initial Accuracy bine high accuracy and low drift with very low supply No Output Capacitor Required current and small package size. The combination of ultralow
Output Sources 10m A, Sinks 2m A quiescent current and low dropout voltage of only 200m V 40ppm/°C Max Drift (max) makes them ideal for battery-powered equipment. Voltage Options: 2.5V, 3V, 4.1V, 5V and Adjustable The output voltage is set by an external resistor divider for the adjustable LTC1798. APPLICATIO This series of references uses curvature compensation to obtain low temperature coefficient and trimmed thin-film
Battery-Powered Systems resistors to achieve high output accuracy. These refer- Handheld Instruments ences can source up to 10m A and sink up to 2m A, making Precision Power Supplies them ideal for precision regulator applications. They are A/D and D/A Converters RE FE RE NC VO LT AG CH AN GE (m V) stable without an output bypass capacitor, but are also
stable with capacitance up to 1µF. This feature is important 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.
TYPICAL APPLICATIO
LTC1798-2.5 Temperature Drift
2.5V Battery-Powered Reference
LTC1798-2.5 22.7V
OUTIN 2.5V
TO 12.6V
1798 TA01
TEMPERATURE (°C)
1798 TA02
Page Summary Contents For LINEAR LTC1798 Series Data Sheet User Guide
Manual Details
| Brand | Linear |
|---|---|
| Pages | 8 |
| File Size | 149.49 KB |
| Published | June 06, 2026 |
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Frequently Asked Questions
How do I set a specific output voltage if it's not one of the pre-set options?
The adjusted LTC1798 version sets the output voltage using an external resistor divider.
Are these suitable for battery-powered applications?
Yes, they are ideal because they feature very low supply current (2-4 µA) and a low dropout voltage of only 200mV.
How much current can the LTC1798 series handle?
The references can source up to 10mA and sink up to 2mA, making them ideal for precise applications.
Is external capacitance required for stable operation?
No output capacitor is required to operate, although they are stable with capacitance up to 1mF.