LTC3547
Info: : PRODUCTION
searchIcon
cartIcon

LTC3547

Dual Monolithic 300mA Synchronous Step-Down Regulator

Show More showmore-icon

Info: : PRODUCTION tooltip
Info: : PRODUCTION tooltip
Viewing: Part Details
arrow-icon

Not the part you were looking for?

viewall Go to Product Selection Table
file View Data Sheet
Documentation View All Documentation
LTspice LTC3547 Demo Circuit - Dual Monolithic 300mA Synchronous Step-Down Regulator (5V to 1.8V @ 300mA & 3.3V @ 300mA) Download 3.00KB LTspice LTC3547 - Step-Down (Buck) Regulators Download 1.43 KB
Part Models 4
1ku List Price Starting From $2.35
Features
  • High Efficiency Dual Step-Down Outputs: Up to 96%
  • 300mA Output Current per Channel at VIN = 3V
  • Automatic Low Ripple Burst Mode Operation (20mVP-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: IQ < 1µA
  • Low Profi le (0.75mm) 8-Lead 3mm × 2mm DFN Package
Additional Details
show more Icon

The LTC3547 is a dual, 2.25MHz, constant-frequency, synchronous step-down DC/DC converter in a tiny 3mm × 2mm DFN package. 100% duty cycle provides low dropout operation, extending battery life in portable systems. Low output voltages are supported with the 0.6V feedback reference voltage. Each regulator can supply 300mA continuous output current.

The input voltage range is 2.5V to 5.5V, making it ideal for Li-Ion and USB powered applications. Supply current during operation is only 40µA and drops to < 1µA in shutdown. Automatic Burst Mode® operation increases efficiency at light loads, further extending battery life.

An internally set 2.25MHz switching frequency allows the use of tiny surface mount inductors and capacitors. Internal soft-start reduces inrush current during startup. All outputs are internally compensated to work with ceramic capacitors. The LTC3547 is available in a low profile (0.75mm) 3mm × 2mm DFN package.The LTC3547is also available in a fixed output voltage configuration,eliminating the need for the external feedback networks

Applications

  • Cellular Telephones
  • Digital Still Cameras
  • Wireless and DSL Modems
  • PDAs/Palmtop PCs
  • Portable Media Players
Show More Arrow image
file View Data Sheet
Documentation View All Documentation
LTspice LTC3547 Demo Circuit - Dual Monolithic 300mA Synchronous Step-Down Regulator (5V to 1.8V @ 300mA & 3.3V @ 300mA) Download 3.00KB LTspice LTC3547 - Step-Down (Buck) Regulators Download 1.43 KB
Part Models 4
1ku List Price Starting From $2.35
modal bookmark icon

{{modalTitle}}

modal close icon

{{modalDescription}}

{{dropdownTitle}}

input down arrow
  • {{defaultSelectedText}}
    • {{#each projectNames}}
  • {{name}}
    • {{/each}} {{#if newProjectText}}
  • plus icon {{newProjectText}}
    • {{/if}}
{{#if toggleButtonDescription}}
{{toggleButtonDescription}}
{{/if}} {{#if newProjectTitle}}

{{newProjectTitle}}

{{projectNameErrorText}}

{{/if}}

LTC3547

Documentation

4
overlayclose

Filters

1 Applied

mobileoverlaydownarrow
  • All
    TickIcon
  • Data Sheet
  • User Guide
  • Reliability Data
  • All
    TickIcon
  • English
  • Japanese
resetfilter

Reset Filters

Data Sheet

2

PDF Vector

PDF

UPDATED 11/21/2007
English

LTC3547: Dual Monolithic 300mA Synchronous Step-Down Regulator Data Sheet

Open PDF File

redirect
302.00K
download

Download PDF

PDF Vector

PDF

UPDATED 10/19/2006
Japanese

LTC3547: デュアル･モノリシック300mA同期整流式降圧レギュレータ データシート

Open PDF File

redirect
795.00K
download

Download PDF

User Guide

1

PDF Vector

PDF

UPDATED 09/24/2009
English
DC1013A - Demo Manual redirect icon

527.00K

download

Download PDF

Reliability Data

1

PDF Vector

PDF

UPDATED 03/23/2018
English
R415 Reliability Data redirect icon

25.65 K

download

Download PDF

There are no results matching this criteria. Try resetting your filters or searching for a different term

close icon

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
LTC3547EDDB#TRMPBF 8-Lead DFN (3mm x 2mm w/ EP) external-link
  • HTML
  • Material Declaration external-link
  • HTML
  • Reliablity Data external-link
LTC3547EDDB#TRPBF 8-Lead DFN (3mm x 2mm w/ EP) external-link
  • HTML
  • Material Declaration external-link
  • HTML
  • Reliablity Data external-link
LTC3547EDDB-1#TRMPBF 8-Lead DFN (3mm x 2mm w/ EP) external-link
  • HTML
  • Material Declaration external-link
  • HTML
  • Reliablity Data external-link
LTC3547EDDB-1#TRPBF 8-Lead DFN (3mm x 2mm w/ EP) external-link
  • HTML
  • Material Declaration external-link
  • HTML
  • Reliablity Data external-link

Software & Part Ecosystem

Parts Product Life Cycle Description

Digital Power System Managers1
LTC2974
popup image
Cart

RECOMMENDED FOR NEW DESIGNS

4-Channel PMBus Power System Manager Featuring Accurate Output Current Measurement

Multiple Output Buck Regulators1
LTC3880
popup image
Cart

RECOMMENDED FOR NEW DESIGNS

Dual Output PolyPhase Step-Down DC/DC Controller with Digital Power System Management

Single-Supply Monitors1
LTC2935
popup image
Cart

PRODUCTION

Ultra-Low Power Supervisor with Power-Fail Output, Selectable Thresholds

Evaluation Kits 1

reference details image

DC1013A

LTC3547EDDB | Dual Monolithic Synchronous Buck Converter

zoom

DC1013A

LTC3547EDDB | Dual Monolithic Synchronous Buck Converter

download icon

Download

 print icon

Print
DC1013A
LTC3547EDDB | Dual Monolithic Synchronous Buck Converter
Buy Now View Details

Product Detail

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.

Resources

pdf icon

PDF

DC1013A - Schematic Download

30.00K

pdf icon

PDF

DC1013A - Demo Manual Download

527.00K

pdf icon

ZIP

DC1013A - Design File Download

571.00K

Show More Arrow image

Evaluation Kits1

evaluation kit item images

DC1013A

LTC3547EDDB | Dual Monolithic Synchronous Buck Converter

Tools & Simulations 2

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.

To launch ready-to-run LTspice demonstration circuits for this part:

Step 1: Download and install LTspice on your computer.

Step 2: Click on the link in the section below to download a demonstration circuit.

Step 3: If LTspice does not automatically open after clicking the link below, you can instead run the simulation by right clicking on the link and selecting “Save Target As.” After saving the file to your computer, start LTspice and open the demonstration circuit by selecting ‘Open’ from the ‘File’ menu.

spice tool Lt Spice

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

3.00K

spice tool Lt Spice

LTC3547 - Step-Down (Buck) Regulators Download

1.43 K

Recently Viewed

Part Details
Documentation
Software & Part Ecosystem
Evaluation Kit
Tools & Simulations
Latest Discussions