LTC2900 - Programmable Quad Supply Monitor with Adjustable Reset Timer


  • Simultaneously Monitors Four Supplies
  • 16 User Selectable Combinations of 5V, 3.3V, 3V, 2.5V, 1.8V, 1.5V and/or ±Adjustable Voltage Thresholds
  • Guaranteed Threshold Accuracy: ±1.5% of Monitored Voltage Over Temperature
  • Low Supply Current: 43µA Typ
  • Adjustable Reset Time
  • Small MSOP and 3mm x 3mm DFN Packages
  • Manual Reset Pin
  • Open-Drain RST Output (LTC2900-1)
  • Push-Pull RST Output (LTC2900-2)
  • Power Supply Glitch Immunity
  • Guaranteed RST for VCC >/= 1V

Typical Application

LTC2900 Typical Application


The LTC™2900 is a programmable supply monitor for systems with up to four supply voltages. One of 16 preset or adjustable voltage monitor combinations can be selected using an external resistor divider connected to the program pin. The preset voltage thresholds are accurate to �1.5% over temperature.

The reset delay time is adjustable using an external capacitor and the manual reset input may be used with a momentary switch to issue reset pulses with programmed duration. Tight voltage threshold accuracy and glitch immunity ensure reliable reset operation without false triggering. The RST output is guaranteed to be in the correct state for VCC down to 1V. The LTC2900-1 features an open-drain RST output, while the LTC2900-2 has a push-pull RST output.

The 43µA supply current makes the LTC2900 ideal for power conscious systems and it may be configured to monitor less than four inputs. The parts are available in the 10-lead MSOP and the 10-lead 3mm x 3mm DFN packages.


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
LTC2900-1CDD#PBF 3x3 DFN-10 DD C 05-08-1699 Yes
LTC2900-1CDD#TRPBF 3x3 DFN-10 DD C 05-08-1699 Yes
LTC2900-1CMS#PBF MS-10 MS C 05-08-1661 Yes
LTC2900-1CMS#TRPBF MS-10 MS C 05-08-1661 Yes
LTC2900-1IDD#PBF 3x3 DFN-10 DD I 05-08-1699 Yes
LTC2900-1IDD#TRPBF 3x3 DFN-10 DD I 05-08-1699 Yes
LTC2900-1IMS#PBF MS-10 MS I 05-08-1661 Yes
LTC2900-1IMS#TRPBF MS-10 MS I 05-08-1661 Yes
LTC2900-2CDD#PBF 3x3 DFN-10 DD C 05-08-1699 Yes
LTC2900-2CDD#TRPBF 3x3 DFN-10 DD C 05-08-1699 Yes
LTC2900-2CMS#PBF MS-10 MS C 05-08-1661 Yes
LTC2900-2CMS#TRPBF MS-10 MS C 05-08-1661 Yes
LTC2900-2IDD#PBF 3x3 DFN-10 DD I 05-08-1699 Yes
LTC2900-2IDD#TRPBF 3x3 DFN-10 DD I 05-08-1699 Yes
LTC2900-2IMS#PBF MS-10 MS I 05-08-1661 Yes
LTC2900-2IMS#TRPBF MS-10 MS I 05-08-1661 Yes

LTC2900 Package Drawing
LTC2900 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
LTC2900-1CDD#PBF 3x3 DFN-10 C $2.55 $2.05 Yes
LTC2900-1CDD#TRPBF 3x3 DFN-10 C $2.15 Yes
LTC2900-1CMS#PBF MS-10 C $2.30 $1.85 Yes
LTC2900-1CMS#TRPBF MS-10 C $1.91 Yes
LTC2900-1IDD#PBF 3x3 DFN-10 I $2.90 $2.40 Yes
LTC2900-1IDD#TRPBF 3x3 DFN-10 I $2.50 Yes
LTC2900-1IMS#PBF MS-10 I $2.70 $2.15 Yes
LTC2900-1IMS#TRPBF MS-10 I $2.21 Yes
LTC2900-2CDD#PBF 3x3 DFN-10 C $2.55 $2.05 Yes
LTC2900-2CDD#TRPBF 3x3 DFN-10 C $2.15 Yes
LTC2900-2CMS#PBF MS-10 C $2.30 $1.85 Yes
LTC2900-2CMS#TRPBF MS-10 C $1.91 Yes
LTC2900-2IDD#PBF 3x3 DFN-10 I $2.90 $2.40 Yes
LTC2900-2IDD#TRPBF 3x3 DFN-10 I $2.50 Yes
LTC2900-2IMS#PBF MS-10 I $2.70 $2.15 Yes
LTC2900-2IMS#TRPBF MS-10 I $2.21 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.

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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.

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