LTC3547

Name: LTC3547
Brand: Analog Devices
Price: 2.97 USD
Availability: InStock

PRODUCTION

Dual Monolithic 300mA Synchronous Step-Down Regulator

Data Sheet Product Selection Table

Part Models: 4
1ku List Price: Starting From $2.97

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Overview

High Efficiency Dual Step-Down Outputs: Up to 96%
300mA Output Current per Channel at V_IN = 3V
Automatic Low Ripple Burst Mode Operation (20mV_P-P).
Only 40µA Quiescent Current During Operation (Both Channels)
2.25MHz Constant-Frequency Operation
2.5V to 5.5V Input Voltage Range
Low Dropout Operation: 100% Duty Cycle
Internally Compensated for All Ceramic Capacitors
Independent Internal Soft-Start for Each Channel
Current Mode Operation for Excellent Line and Load Transient Response
0.6V Reference Allows Low Output Voltages
Short-Circuit Protected
Ultralow Shutdown Current: I_Q < 1µA
Low Proﬁ le (0.75mm) 8-Lead 3mm × 2mm DFN Package

Part Models: 4
1ku List Price: Starting From $2.97

Documentation

Data Sheet 1

LTC3547: Dual Monolithic 300mA Synchronous Step-Down Regulator Data Sheet 11/21/2007

User Guide 1

DC1013A - Demo Manual 09/24/2009

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
LTC3547EDDB#TRMPBF	8-Lead DFN (3mm x 2mm w/ EP)	Material Declaration Reliability Report Package Resources	Ultra Librarian SamacSys
LTC3547EDDB#TRPBF	8-Lead DFN (3mm x 2mm w/ EP)	Material Declaration Reliability Report Package Resources	Ultra Librarian SamacSys
LTC3547EDDB-1#TRMPBF	8-Lead DFN (3mm x 2mm w/ EP)	Material Declaration Reliability Report Package Resources	Ultra Librarian SamacSys
LTC3547EDDB-1#TRPBF	8-Lead DFN (3mm x 2mm w/ EP)	Material Declaration Reliability Report Package Resources	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
Power System Management (PSM) & Sequencers 1
LTC2974	RECOMMENDED FOR NEW DESIGNS	4-Channel PMBus Power System Manager Featuring Accurate Output Current Measurement
Supervisory Circuits & Reset ICs 1
LTC2935	PRODUCTION	Ultra-Low Power Supervisor with Power-Fail Output, Selectable Thresholds
Switching Regulators & Controllers 1
LTC3880	RECOMMENDED FOR NEW DESIGNS	Dual Output PolyPhase Step-Down DC/DC Controller with Digital Power System Management

Tools & Simulations

LTspice 1

LTC3547 Demo Circuit - Dual Monolithic 300mA Synchronous Step-Down Regulator (5V to 1.8V @ 300mA & 3.3V @ 300mA)

Models for the following parts are available in LTspice:

LTC3547
LTC3547-1
LTC3547B
LTC3547B-1

LTpowerCAD 1

LTC3547 Project - Dual 300mA Monolithic Synchronous Step-Down Regulator (2.7-5.5V to 1.5V @ 300mA & 2.5V @ 250mA)

Design tools for the following parts are available in LTpowerCAD:

LTC3547

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

LTC3547EDDB | Dual Monolithic Synchronous Buck Converter

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Product Details

Demonstration circuit 1013 is a dual output regulator consisting of two constant-frequency step-down converters, based on the LTC3547 monolithic dual synchronous buck regulator IC. The DC1013 has an input voltage range of 2.5V to 5.5V, and both outputs are capable of delivering up to 300 mA of output current at a minimum input voltage of 3V. In Burst Mode^® operation, which is the mode of the LTC3547 during light load current operation, the DC supply current of the DC1013 is typically only 40 uA (per channel) at no load, and less than 1 uA in shutdown. The DC1013 is a very efficient circuit: over 95% for either circuit. The LTC3547 comes in a tiny 8-lead 3 × 2 mm DFN package, which has an exposed pad on the bottom-side of the IC for better thermal performance.