LTC3458L

RECOMMENDED FOR NEW DESIGNS

LTC3458L

1.7A, 1.5MHz Synchronous Step-Up DC/DC Converter with Output Disconnect

RECOMMENDED FOR NEW DESIGNS

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Features

High Efficiency: Up to 95%
Inrush Current Limiting and Output Disconnect
Programmable Output Voltages up to 6V
1.5V to 6V Input Range
Programmable/Synchronizable Fixed Frequency Operation up to 1.5MHz
Programmable Automatic Burst Mode^® Operation
Current Mode Control with Programmable Soft-Start Period and Peak Current Limit
0.2Ω N-Channel and 0.3Ω P-Channel Switches
Ultralow Quiescent Currents: 12µA Sleep, <1µA in Shutdown
12-Pin 4mm × 3mm Thermally Enhanced DFN Package

Additional Details

The LTC3458L is a high efficiency, current mode, fixed frequency, step up DC/DC converter with true output disconnect and inrush current limiting. The LTC3458L is rated for up to 6V output and includes a 0.2Ω N-channel MOSFET switch and a 0.3Ω P-channel MOSFET synchronous rectifier. The LTC3458L is well suited for battery powered applications and includes programmable output voltage, switching frequency and loop compensation. The oscillator frequency can be set up to 1.5MHz or synchronized to an external clock.

Quiescent current is only 12µA during Burst Mode operation maximizing battery life in portable applications. The Burst Mode current threshold, peak current limit, and softstart are externally programmable. Other features include <1µA shutdown current, antiringing control, and thermal limit. The LTC3458L is available in a low profile (0.75mm), 4mm × 3mm 12-pin DFN package.

Protected by U.S. Patents including 5481178, 6304066, 6580258, 5511131, 6498466


	Vout Range	Switch Current
LTC3458	2.0V to 7.5V	1.4A
LTC3458L	2.0V to 6.0V	1.7A

Applications

Point-of-Load Regulators
USB V_BUSPower
Portable GPS
MP3 Players

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Ask a Question

Submit your question below and we will return the best answer from ADI’s knowledge database:

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Support

Analog Devices Support Portal is a one-stop shop to answer all your ADI questions.

Visit the ADI Support Page

Ask the ADI community for help.

Ask the EngineerZone Community

FAQs

Sales & Ordering FAQs

Part Models 2

1ku List Price Starting From $4.00

Technical Documents 3

LTC3458L: 1.7A, 1.5MHz Synchronous Step-Up DC/DC Converter with Output Disconnect Data Sheet 08/01/2007

R419 Reliability Data 03/22/2018

DC878A - Demo Manual 09/24/2009

Design Resources 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
LTC3458LEDE#PBF	12-Lead DFN (4mm x 3mm w/ EP)	HTML Material Declaration HTML Reliablity Data	Ultra Librarian SamacSys
LTC3458LEDE#TRPBF	12-Lead DFN (4mm x 3mm w/ EP)	HTML Material Declaration HTML Reliablity Data	Ultra Librarian SamacSys

LTC3458LEDE#PBF
Pin/Package Drawing
12-Lead DFN (4mm x 3mm w/ EP)
Documentation

HTML Material Declaration

HTML Reliablity Data

CAD Symbols, Footprints, and 3D Models
Ultra Librarian
SamacSys

LTC3458LEDE#TRPBF
Pin/Package Drawing
12-Lead DFN (4mm x 3mm w/ EP)
Documentation

HTML Material Declaration

HTML Reliablity Data

CAD Symbols, Footprints, and 3D Models
Ultra Librarian
SamacSys

Companion Parts 2

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LTC6908		Resistor Set SOT-23 Oscillator with Spread Spectrum Modulation
LTC6909	PRODUCTION	1 to 8 Output, Multiphase Silicon Oscillator with Spread Spectrum Modulation

DC878A

LTC3458LEDE Demo Board | 2V ≤ VIN ≤ 5V, VOUT = 5V @ 300mA to 900mA

DC878A

LTC3458LEDE Demo Board | 2V ≤ VIN ≤ 5V, VOUT = 5V @ 300mA to 900mA

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Product Detail

Demonstration circuit 878 is a 1MHz Synchronous Step-Up DC/DC Converter featuring the LTC3458LEDE. The demo board demonstrates a DC/DC boost converter, with a 1.7A switch, providing 5V at 300mA to 900mA depending on input voltage, which ranges from 2V to 5V.

The circuit demonstrates the advantages of output disconnect and inrush current limiting.

Resources

ZIP

DC878A - Design File

477.00K

PDF

DC878A - Demo Manual

503.00K

PDF

DC878A - Schematic

24.00K

DC878A

LTC3458LEDE Demo Board | 2V ≤ VIN ≤ 5V, VOUT = 5V @ 300mA to 900mA

LTspice 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.