LTC2921
LTC2921
RECOMMENDED FOR NEW DESIGNSPower Supply Tracker with Input Monitors
- Part Models
- 12
- 1ku List Price
- Starting From $5.26
Viewing:
Overview
- Tracks Multiple Supplies with MOSFET Switches
- Monitors 5 Input Voltages Including VCC
- Guaranteed Threshold Accuracy: ±1% at 0.5V
- Automatic Remote Sense Switching
- Adjustable Supply Ramp Rate
- Overvoltage Monitor
- Adjustable Electronic Circuit Breaker
- Adjustable Power-Good Delay
- Available for VCC Supply Voltages of 5V, 3.3V and 2.5V
- Available in 16-Pin Narrow SSOP (LTC2921 Series) and 20-Pin TSSOP (LTC2922 Series)
The LTC2921 and LTC2922 monitor up to five supplies and force them to track on power-up in multiple supply systems. Using external N-channel pass transistors, the supplies can be ramped up at an adjustable rate. Automatic remote sense switching allows the DC/DC converters to compensate for series voltage drops in the wiring. An incorrect level on one or more of the supplies triggers disconnect of all supplies. Tight 1% accuracy and glitch immunity on the low 0.5V monitoring level ensure no false error disconnects.
The LTC2921 and LTC2922 each feature an adjustable electronic circuit breaker to protect the VCC supply against short circuits. Capacitance at the TIMER pin programs the delays in the monitoring sequence.
The LTC2921 includes three remote sense switches in a 16-pin narrow SSOP package, while the LTC2922 includes five remote sense switches in a 20-pin TSSOP package. Both parts are available for VCC supply voltages of 5V, 3.3V, and 2.5V.
Applications
- Desktop Computers
- Plug-In Cards
- Telecom Infrastructure
- Supply Sequencing
- Instruments
Documentation
Data Sheet 1
Technical Articles 2
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 Model | Pin/Package Drawing | Documentation | CAD Symbols, Footprints, and 3D Models |
|---|---|---|---|
| LTC2921CGN#PBF | 16-Lead SSOP (Narrow 0.15 Inch) | ||
| LTC2921CGN#TRPBF | 16-Lead SSOP (Narrow 0.15 Inch) | ||
| LTC2921CGN-2.5#PBF | 16-Lead SSOP (Narrow 0.15 Inch) | ||
| LTC2921CGN-2.5#TRPBF | 16-Lead SSOP (Narrow 0.15 Inch) | ||
| LTC2921CGN-3.3#PBF | 16-Lead SSOP (Narrow 0.15 Inch) | ||
| LTC2921CGN-3.3#TRPBF | 16-Lead SSOP (Narrow 0.15 Inch) | ||
| LTC2921IGN#PBF | 16-Lead SSOP (Narrow 0.15 Inch) | ||
| LTC2921IGN#TRPBF | 16-Lead SSOP (Narrow 0.15 Inch) | ||
| LTC2921IGN-2.5#PBF | 16-Lead SSOP (Narrow 0.15 Inch) | ||
| LTC2921IGN-2.5#TRPBF | 16-Lead SSOP (Narrow 0.15 Inch) | ||
| LTC2921IGN-3.3#PBF | 16-Lead SSOP (Narrow 0.15 Inch) | ||
| LTC2921IGN-3.3#TRPBF | 16-Lead SSOP (Narrow 0.15 Inch) |
| Part Models | Product Lifecycle | PCN |
|---|---|---|
|
Oct 3, 2024 - 24_0235 (QSOP/SSOP PKG) Migrating Bottom Trace Code Marking to Top Side Laser Marking |
||
| LTC2921CGN#PBF | PRODUCTION | |
| LTC2921CGN#TRPBF | PRODUCTION | |
| LTC2921CGN-2.5#PBF | PRODUCTION | |
| LTC2921CGN-2.5#TRPBF | PRODUCTION | |
| LTC2921CGN-3.3#PBF | PRODUCTION | |
| LTC2921CGN-3.3#TRPBF | PRODUCTION | |
| LTC2921IGN#PBF | PRODUCTION | |
| LTC2921IGN#TRPBF | PRODUCTION | |
| LTC2921IGN-2.5#PBF | PRODUCTION | |
| LTC2921IGN-2.5#TRPBF | PRODUCTION | |
| LTC2921IGN-3.3#PBF | PRODUCTION | |
| LTC2921IGN-3.3#TRPBF | PRODUCTION | |
|
Oct 11, 2022 - 22_0235 Epoxy Change from Henkel 8290 to 8290A for GN Package |
||
| LTC2921CGN#PBF | PRODUCTION | |
| LTC2921CGN#TRPBF | PRODUCTION | |
| LTC2921CGN-2.5#PBF | PRODUCTION | |
| LTC2921CGN-2.5#TRPBF | PRODUCTION | |
| LTC2921CGN-3.3#PBF | PRODUCTION | |
| LTC2921CGN-3.3#TRPBF | PRODUCTION | |
| LTC2921IGN#PBF | PRODUCTION | |
| LTC2921IGN#TRPBF | PRODUCTION | |
| LTC2921IGN-2.5#PBF | PRODUCTION | |
| LTC2921IGN-2.5#TRPBF | PRODUCTION | |
| LTC2921IGN-3.3#PBF | PRODUCTION | |
| LTC2921IGN-3.3#TRPBF | PRODUCTION | |
|
Apr 6, 2022 - 22_0066 Laser Top Mark for 16QSOP Assembled in ADPG [PNG] |
||
| LTC2921CGN#PBF | PRODUCTION | |
| LTC2921CGN#TRPBF | PRODUCTION | |
| LTC2921CGN-2.5#PBF | PRODUCTION | |
| LTC2921CGN-2.5#TRPBF | PRODUCTION | |
| LTC2921CGN-3.3#PBF | PRODUCTION | |
| LTC2921CGN-3.3#TRPBF | PRODUCTION | |
| LTC2921IGN#PBF | PRODUCTION | |
| LTC2921IGN#TRPBF | PRODUCTION | |
| LTC2921IGN-2.5#PBF | PRODUCTION | |
| LTC2921IGN-2.5#TRPBF | PRODUCTION | |
| LTC2921IGN-3.3#PBF | PRODUCTION | |
| LTC2921IGN-3.3#TRPBF | PRODUCTION | |
This is the most up-to-date revision of the Data Sheet.
Software Resources
Can't find the software or driver you need?
Request a Driver/SoftwareHardware Ecosystem
| Parts | Product Life Cycle | Description |
|---|---|---|
| Power System Management (PSM) & Sequencers 1 | ||
| LTC2974 | RECOMMENDED FOR NEW DESIGNS | 4-Channel PMBus Power System Manager Featuring Accurate Output Current Measurement |
Tools & Simulations
LTspice
Models for the following parts are available in LTspice:
- LTC2921
- LTC2921-2.5
- LTC2921-3.3
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.
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