LTC1728
Micropower Precision Triple Supply Monitors in 8-Lead MSOP and 5-Lead SOT-23 Packages
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Overview
Features and Benefits
- Monitors Three Inputs Simultaneously
- LTC1727-5: 5V, 3.3V and ADJ
- LTC1727-2.5: 2.5V, 3.3V and ADJ
- LTC1728-5: 5V, 3.3V and ADJ
- LTC1728-2.5: 2.5V, 3.3V and ADJ
- LTC1728-1.8: 3V, 1.8V and ADJ
- LTC1728-3.3: 3.3V, 1.8V and ADJ
- ±1.5% Threshold Accuracy Over Temperature
- Very Low Supply Current: 10µA Typ
- 200ms Reset Time Delay
- Active Low RESET Output
- Power Supply Glitch Immunity
- Guaranteed RESET for VCC3 ≥ 1V or VCC5/VCC25/VCC18 ≥ 1V
- LTC1727 Includes Monitor Output for Each Supply
- LTC1727: 8-Lead MSOP and SO Packages
- LTC1728: 5-Lead SOT-23 Package
Product Details
The LTC1727 is a triple supply monitor intended for systems with multiple supply voltages. Each supply monitor has its own open-drain output for individual supply monitoring. A common open-drain reset output remains low until all three supplies have been in compliance for 200ms. Tight 1.5% accuracy specifications and glitch immunity ensure reliable reset operation without false triggering.
The LTC1728 is functionally identical to the LTC1727 without the individual monitor outputs.
The RST output is guaranteed to be in the correct state for VCC5/VCC25/VCC18 or VCC3 down to 1V. The LTC1727/LTC1728 may also be configured to monitor any one or two VCC inputs instead of three, depending on system requirements.
Very low (10µA typical) supply current makes the LTC1727/LTC1728 ideal for power conscious systems.
The LTC1727 is available in an 8-lead MSOP or SO package and the LTC1728 is available in a 5-lead SOT-23 package.
Applications
- Desktop Computers
- Notebook Computers
- Intelligent Instruments
- Portable Battery-Powered Equipment
- Network Servers
Product Categories
Product Lifecycle
Production
At least one model within this product family is in production and available for purchase. The product is appropriate for new designs but newer alternatives may exist.
Documentation & Resources
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R413 Reliability Data3/26/2018
-
Ramp Three Supplies with a Supply Monitor and Hot Swap Controller5/1/2001 LT Journal
Tools & Simulations
LTspice
LTspice® is a powerful, fast and free simulation software, schematic capture and waveform viewer with enhancements and models for improving the simulation of analog circuits.
Models for the following parts are available in LTspice:
LTC1728-1.8
LTC1728-2.5
LTC1728-3.3
LTC1728-5
Design Resources
ADI has always placed the highest emphasis on delivering products that meet the maximum levels of quality and reliability. We achieve this by incorporating quality and reliability checks in every scope of product and process design, and in the manufacturing process as well. "Zero defects" for shipped products is always our goal.View our quality and reliability program and certifications for more information.
| Part Number | Material Declaration | Reliability Data | Pin/Package Drawing | CAD Symbols, Footprints & 3D Models |
|---|---|---|---|---|
| LTC1728ES5-1.8#TRMPBF | Material Declaration | Reliability Data | 5-Lead TSOT-23 | |
| LTC1728ES5-1.8#TRPBF | Material Declaration | Reliability Data | 5-Lead TSOT-23 | |
| LTC1728ES5-2.5#TRMPBF | Material Declaration | Reliability Data | 5-Lead TSOT-23 | |
| LTC1728ES5-2.5#TRPBF | Material Declaration | Reliability Data | 5-Lead TSOT-23 | |
| LTC1728ES5-3.3#TRMPBF | Material Declaration | Reliability Data | 5-Lead TSOT-23 | |
| LTC1728ES5-3.3#TRPBF | Material Declaration | Reliability Data | 5-Lead TSOT-23 | |
| LTC1728ES5-5#TRMPBF | Material Declaration | Reliability Data | 5-Lead TSOT-23 | |
| LTC1728ES5-5#TRPBF | Material Declaration | Reliability Data | 5-Lead TSOT-23 | |
| LTC1728HS5-5#TRMPBF | Material Declaration | Reliability Data | 5-Lead TSOT-23 | |
| LTC1728HS5-5#TRPBF | Material Declaration | Reliability Data | 5-Lead TSOT-23 | |
| Wafer Fabrication Data | R413 Reliability Data |
Support & Discussions
Sample & Buy
Ordering FAQs
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Buy Now Pricing
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List Pricing
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Lead Times
Please see the latest communication from our CCO regarding lead times.
Sampling
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