LTC2922

RECOMMENDED FOR NEW DESIGNS

Power Supply Tracker with Input Monitors

Part Models: 12
1ku List Price: Starting From $4.13

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Overview

Tracks Multiple Supplies with MOSFET Switches
Monitors 5 Input Voltages Including V_CC
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 V_CC 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 V_CC 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 V_CC supply voltages of 5V, 3.3V, and 2.5V.

Applications

Desktop Computers
Plug-In Cards
Telecom Infrastructure
Supply Sequencing
Instruments

Part Models: 12
1ku List Price: Starting From $4.13

Documentation

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
LTC2922CF#PBF	20-Lead TSSOP	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LTC2922CF#TRPBF	20-Lead TSSOP	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LTC2922CF-2.5#PBF	20-Lead TSSOP	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LTC2922CF-2.5#TRPBF	20-Lead TSSOP	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LTC2922CF-3.3#PBF	20-Lead TSSOP	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LTC2922CF-3.3#TRPBF	20-Lead TSSOP	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LTC2922IF#PBF	20-Lead TSSOP	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LTC2922IF#TRPBF	20-Lead TSSOP	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LTC2922IF-2.5#PBF	20-Lead TSSOP	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LTC2922IF-2.5#TRPBF	20-Lead TSSOP	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LTC2922IF-3.3#PBF	20-Lead TSSOP	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LTC2922IF-3.3#TRPBF	20-Lead TSSOP	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys

Part Models	Product Lifecycle	PCN

Apr 6, 2022 - 22_0068 Laser Top Mark for ETSSOP and TSSOP Packages Assembled in ADPG [PNG] and UTL
		PCN22_0068_Form Material_Report Delta Qualification Matrix
LTC2922CF-3.3#PBF	PRODUCTION
LTC2922CF-3.3#TRPBF	PRODUCTION
LTC2922IF-3.3#PBF	PRODUCTION
LTC2922IF-3.3#TRPBF	PRODUCTION

This is the most up-to-date revision of the Data Sheet.

Software Resources

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Hardware 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 1

LT1763 - LDO Linear Regulators, LTC2922 - Sequencers, Trackers, and Margining Controllers

Models for the following parts are available in LTspice:

LTC2922
LTC2922-2.5
LTC2922-3.3

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.