LTC3561A

PRODUCTION

1A, 4MHz, Synchronous Step-Down DC/DC Converter

Data Sheet Product Selection Table

Part Models: 4
1ku List Price: Starting From $2.13

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Part Details

Uses Tiny Capacitors and Inductor
High Frequency Operation: Up to 4MHz
Low R_DS(ON) Internal Switches: 0.15Ω
High Efficiency: Up to 96%
Stable with Ceramic Capacitors
Current Mode Operation for Excellent Line and Load Transient Response
Short-Circuit Protected
Low Dropout Operation: 100% Duty Cycle
Low Shutdown Current: I_Q ≤ 1μA
Low Quiescent Current: 330μA
Output Voltages from 0.8V to 5V
V_IN: 2.5V to 5.5V
Small 8-Lead 3mm × 3mm DFN Package

Part Models: 4
1ku List Price: Starting From $2.13

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
LTC3561AEDD#PBF	8-Lead DFN (3mm x 3mm x 0.75mm w/ EP)	Material Declaration Reliablity Data	Ultra Librarian SamacSys
LTC3561AEDD#TRPBF	8-Lead DFN (3mm x 3mm x 0.75mm w/ EP)	Material Declaration Reliablity Data	Ultra Librarian SamacSys
LTC3561AIDD#PBF	8-Lead DFN (3mm x 3mm x 0.75mm w/ EP)	Material Declaration Reliablity Data	Ultra Librarian SamacSys
LTC3561AIDD#TRPBF	8-Lead DFN (3mm x 3mm x 0.75mm w/ EP)	Material Declaration Reliablity Data	Ultra Librarian SamacSys

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
Digital Power System Managers 1
LTC2974	RECOMMENDED FOR NEW DESIGNS	4-Channel PMBus Power System Manager Featuring Accurate Output Current Measurement
Multiple Output Buck Regulators 1
LTC3880	RECOMMENDED FOR NEW DESIGNS	Dual Output PolyPhase Step-Down DC/DC Controller with Digital Power System Management
Single-Supply Monitors 1
LTC2935	PRODUCTION	Ultra-Low Power Supervisor with Power-Fail Output, Selectable Thresholds

Tools & Simulations

LTspice 2

Models for the following parts are available in LTspice:

LTC3561
LTC3561A

LTpowerCAD 1

LTC3561A Project - 1A, 4MHz, Synchronous Step-Down Converter (2.6-5.5V to 1.5V @ 1A)

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.

LTpowerCAD^® is a power supply design program which selects power stage components, provides detailed power efficiency, shows quick loop Bode plot stability and load transient analysis, and can export to LTspice for simulation.

Evaluation Kits

LTC3561AEDD Demo Board | 2.5V ≤ VIN ≤ 5.5V, VOUT = 1.2V/1.5V/1.8V/Adjustable @ 1A

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Product Details

Demonstration circuit 1072B is a step-down converter using the LTC3561A monolithic synchronous buck regulator. The DC1072B has an input voltage range of 2.5V to 5.5V, and is capable of delivering up to 1A of output current at a jumper-selectable output voltage of 1.2V, 1.5V, 1.8V or user-defined.

Resources

DC1072B - Schematic
9/24/2009

DC1072B - Design File
9/24/2009

DC1072B - Demo Manual
9/24/2009

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