Features and Benefits
- Flexible Power Supply Tracking Up and Down
- Power Supply Sequencing
- Supply Stability Is Not Affected
- Controls Three Supplies Without Series FETs
- Controls an Optional Fourth Supply with a Series FET
- Electronic Circuit Breaker
- Remote Sense Switch Compensates for Voltage Drop Across a Series FET
- Supply Shutdown Outputs
- FAULT Output
- Adjustable Power Good Timeout
- Available in Narrow 24-Lead SSOP and Tiny 24-Lead QFN Packages
The LTC2925 provides a simple solution to power supply tracking and sequencing requirements. By selecting a few resistors, the supplies can be configured to ramp-up and ramp-down together or with voltage offsets, time delays or different ramp rates.
The LTC2925 controls the outputs of three independent supplies without inserting any pass element losses. For systems that require a fourth supply, or when a supply does not allow direct access to its feedback resistors, one supply can be controlled with a series FET. When the FET is used, an internal remote sense switch compensates for the voltage drop across the FET and current sense resistor, and an electronic circuit breaker provides protection from short-circuit conditions.
The LTC2925 also includes a power good timeout feature that turns off the supplies if an external supply monitor fails to indicate that the supplies have entered regulation within an adjustable time-out period.
- VCORE and VI/O Supply Tracking
- Microprocessor, DSP and FPGA Supplies
- Communication Systems
Product Lifecycle Recommended for New Designs
This product has been released to the market. The data sheet contains all final specifications and operating conditions. For new designs, ADI recommends utilization of these products.
Documentation & Resources
R413 Reliability Data3/26/2018
MOSFETs Make Sense for Tracking and Sequencing Power Supplies3/1/2006 LT Journal
Tools & Simulations
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:
LTC2925 Companion Parts
Recommended Related Parts
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|
|LTC2925CGN#PBF||Material Declaration||Reliability Data||24-Lead SSOP (Narrow 0.15 Inch)|
|LTC2925CGN#TRPBF||Material Declaration||Reliability Data||24-Lead SSOP (Narrow 0.15 Inch)|
|LTC2925CUF#PBF||Material Declaration||Reliability Data||24-Lead QFN (4mm x 4mm x 0.75mm w/ EP)|
|LTC2925CUF#TRPBF||Material Declaration||Reliability Data||24-Lead QFN (4mm x 4mm x 0.75mm w/ EP)|
|LTC2925IGN#PBF||Material Declaration||Reliability Data||24-Lead SSOP (Narrow 0.15 Inch)|
|LTC2925IGN#TRPBF||Material Declaration||Reliability Data||24-Lead SSOP (Narrow 0.15 Inch)|
|LTC2925IUF#PBF||Material Declaration||Reliability Data||24-Lead QFN (4mm x 4mm x 0.75mm w/ EP)|
|LTC2925IUF#TRPBF||Material Declaration||Reliability Data||24-Lead QFN (4mm x 4mm x 0.75mm w/ EP)|
|Wafer Fabrication Data||R413 Reliability Data|
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Sample & Buy
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