LTC1798 Series - Micropower Low Dropout References

Features

  • 200mV Max Dropout at 10mA Output Current
  • 4μA Typical Quiescent Current
  • 0.15% Max Initial Accuracy
  • No Output Capacitor Required
  • Output Sources 10mA, Sinks 2mA
  • 40ppm/°C Max Drift
  • Voltage Options: 2.5V, 3V, 4.1V, 5V and Adjustable

Typical Application

LTC1798 Typical Application
LTC1798 Typical Application

Description

The LTC®1798/LTC1798-2.5/LTC1798-3/LTC1798-4.1/ LTC1798-5 are micropower bandgap references that combine 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 references 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 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 dissipation 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.

Packaging

CAD Symbols and Footprints: The downloadable Zip file below contains the schematic symbol and PCB footprints.

For complete and up to date package information and drawings, please refer to our packaging page

Part Number Package Code Temp Package
Drawing
RoHS
LTC1798CS8-2.5#PBF SO-8 S8 C 05-08-1610 (S8) Yes
LTC1798CS8-2.5#TRPBF SO-8 S8 C 05-08-1610 (S8) Yes
LTC1798CS8-3#PBF SO-8 S8 C 05-08-1610 (S8) Yes
LTC1798CS8-3#TRPBF SO-8 S8 C 05-08-1610 (S8) Yes
LTC1798CS8-4.1#PBF SO-8 S8 C 05-08-1610 (S8) Yes
LTC1798CS8-4.1#TRPBF SO-8 S8 C 05-08-1610 (S8) Yes
LTC1798CS8-5#PBF SO-8 S8 C 05-08-1610 (S8) Yes
LTC1798CS8-5#TRPBF SO-8 S8 C 05-08-1610 (S8) Yes


LTC1798 Package Drawing

Order Info

  • Part numbers ending in PBF are lead free. Solder plated terminal finish (SnPb) versions are non-standard and special terms and conditions and pricing applies if available. Please contact LTC marketing for information.
  • Part numbers containing TR or TRM are shipped in tape and reel or 500 unit mini tape and reel, respectively
  • Please refer to our general ordering information or the product datasheet for more details

Package Variations and Pricing

Part Number Package Temp Price
(1-99)
Price
(1k)*
RoHS
LTC1798CS8-2.5#PBF SO-8 C $2.55 $2.10 Yes
LTC1798CS8-2.5#TRPBF SO-8 C $2.16 Yes
LTC1798CS8-3#PBF SO-8 C $2.55 $2.10 Yes
LTC1798CS8-3#TRPBF SO-8 C $2.16 Yes
LTC1798CS8-4.1#PBF SO-8 C $2.55 $2.10 Yes
LTC1798CS8-4.1#TRPBF SO-8 C $2.16 Yes
LTC1798CS8-5#PBF SO-8 C $2.55 $2.10 Yes
LTC1798CS8-5#TRPBF SO-8 C $2.16 Yes
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* The USA list pricing shown is for BUDGETARY USE ONLY, shown in United States dollars (FOB USA per unit for the stated volume), and is subject to change. International prices may differ due to local duties, taxes, fees and exchange rates. For volume-specific price or delivery quotes, please contact your local Linear Technology sales office or authorized distributor.

Demo Boards

Linear Technology offers many demo boards free of charge to qualified customers. Contact your local sales office or distributor to inquire about a demo board. Certain demo boards are also available for sale via credit card on this website. Demo boards are for evaluation purposes only. It remains the customer’s responsibility to verify proper and reliable operation in the actual end application.

Click here to view our complete list of demo boards

Applications

  • Battery-Powered Systems
  • Handheld Instruments
  • Precision Power Supplies
  • A/D and D/A Converters
  • Available in the SO-8 Package

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Design Tools

LTspice

LTspice® software is a powerful, fast and free simulation tool, schematic capture and waveform viewer with enhancements and models for improving the simulation of switching regulators. Click here to download LTspice

Models for the following parts are available in LTspice:
LTC1798

Technical Support