LT3461

PRODUCTION

1.3MHz Step-Up DC/DC Converters with Integrated Schottky in ThinSOT

Part Models: 2
1ku List Price: Starting From $2.23

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Part Details

Integrated Schottky Rectifier
Fixed Frequency 1.3MHz/3MHz Operation
High Output Voltage: Up to 38V
Low V_CESAT Switch: 260mV at 250mA
12V at 70mA from 5V Input
5V at 115mA from 3.3V Input
Wide Input Range: 2.5V to 16V
Uses Small Surface Mount Components
Low Shutdown Current: <1µA
Soft-Start
Low Profile (1mm) SOT-23 (ThinSOT^™) Package

The LT3461/LT3461A are general purpose fixed frequency current mode step-up DC/DC converters. Both devices feature an integrated Schottky and a low V_CESAT switch allowing a small converter footprint and lower parts cost. The LT3461 switches at 1.3MHz while the LT3461A switches at 3MHz. These high switching frequencies enable the use of tiny, low cost and low height capacitors and inductors. The constant switching frequency results in predictable output noise that is easy to filter, and the inductor based topology ensures an input free from switching noise typically present with charge pump solutions. The high voltage switch in the LT3461/LT3461A is rated at 40V making the device ideal for boost converters up to 38V.

The LT3461/LT3461A are available in a low profile (1mm) SOT-23 package.


	Switching Frequency
LT3461	1.3MHz
LT3461A	3MHz

Applications

Digital Cameras
CCD Bias Supply
XDSL Power Supply
TFT-LCD Bias Supply
Local 5V or 12V Supply
Medical Diagnostic Equipment
Battery Backup

Part Models: 2
1ku List Price: Starting From $2.23

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
LT3461ES6#TRMPBF	6-Lead TSOT-23	Material Declaration Reliablity Data	Ultra Librarian SamacSys
LT3461ES6#TRPBF	6-Lead TSOT-23	Material Declaration Reliablity Data	Ultra Librarian SamacSys

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

Tools & Simulations

LTspice 1

LT3461 - Step-Up (Boost) Regulators

Models for the following parts are available in LTspice:

LT3461
LT3461A

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.

Evaluation Kits

LT3461 Signal Chain Evaluation Board | 1.3MHz Boost DC/DC with Int Schottky

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Product Details

Demonstration circuit SCP-LT3461-EVALZ features the LT3461 in a 12V output boost converter which operates from an input voltage of 3V to 6V. The maximum output current is 70mA when powered from a 5.0V input and 40mA when powered from a 3.3V input.

Like all boards in the Signal Chain Power series, this board is designed to be easily plugged into other SCP boards to form a complete signal chain power system, enabling fast evaluation of low power signal chains. To evaluate this board, some universal SCP hardware is required, namely:

SCP-INPUT-EVALZ
SCP-OUTPUT-EVALZ
SCP-1X5BKOUT-EVALZ
SCP-THRUBRD-EVALZ

SCP-FILTER-EVALZ
SCP-1X2BKOUT-EVALZ
SCP-5X1-EVALZ

To properly evaluate SCP series demo boards, you will need the SCP Configurator companion software. SCP Configurator can help you choose the right board and topology for your design.

Note that the Demo Manual does not cover details important to the operation and configuration regarding the LT3461. Please refer to the LT3461 data sheet for a complete description of the part.

Resources

SCP-LT3461-EVALZ - Demo Manual (Rev.0)
645.26 K

SCP-LT3461-EVALZ - Schematic
60.79 K

SCP-LT3461-EVALZ - Design Files
1.98 M

LT3461ES6 Demo Board | 1.3MHz, VIN = 3V to 6V, VOUT = 12V, (at VIN = 5V, IOUT = 70mA)

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Product Details

Demonstration circuit 627 features the LT3461/LT3461A in a 12V output boost converter which operates from an input voltage of 3V to 6V. The DC627A-A is for the 1.3MHz switching LT3461, and the DC627A-B is for the 3MHz switching LT3461A. For both boards, the maximum output current is 70mA when powered from a 5.0V input and 40mA when powered from a 3.3V input.

Resources

DC627A - Design File
459.00K

DC627A - Demo Manual
119.00K

DC627A - Schematic
51.00K

Reference Designs

View Detailed Reference Design

Features and Benefits

Analog Devices has worked closely with FPGA and processor manufacturers to develop verified power solutions that optimize cost, size and efficiency in high performance applications
Our reference designs are supported by an intuitive design tool set and IP
Our team can provide designs for quick prototypes that can speed time to market in the most complex applications