LTC3412A

PRODUCTION

3A, 4MHz, Monolithic Synchronous Step-Down Regulator

Data Sheet (Rev. G) Product Selection Table

Part Models: 10
1ku List Price: Starting From $4.13

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Overview

High Efficiency: Up to 95%
3A Output Current
Low Quiescent Current: 64μA
Low R_DS(ON) Internal Switch: 77mΩ
2.25V to 5.5V Input Voltage Range
Programmable Frequency: 300kHz to 4MHz
±2% Output Voltage Accuracy
0.8V Reference Allows Low Output Voltage

Selectable Forced Continuous/Burst Mode^® Operation with Adjustable Burst Clamp
Synchronizable Switching Frequency
Low Dropout Operation: 100% Duty Cycle
Power Good Output Voltage Monitor
Overtemperature Protected
Available in 16-Lead Exposed Pad TSSOP and QFN Packages

The LTC3412A is a high efficiency monolithic synchronous, step-down DC/DC converter utilizing a constant frequency, current mode architecture. It operates from an input voltage range of 2.25V to 5.5V and provides a regulated output voltage from 0.8V to 5V while delivering up to 3A of output current. The internal synchronous power switch with 77mΩ on-resistance increases efficiency and eliminates the need for an external Schottky diode. Switching frequency is set by an external resistor or can be synchronized to an external clock. 100% duty cycle provides low dropout operation extending battery life in portable systems. OPTI-LOOP^® compensation allows the transient response to be optimized over a wide range of loads and output capacitors.

The LTC3412A can be configured for either Burst Mode operation or forced continuous operation. Forced continuous operation reduces noise and RF interference while Burst Mode operation provides high efficiency by reducing gate charge losses at light loads. In Burst Mode operation, external control of the burst clamp level allows the output voltage ripple to be adjusted according to the application requirements.

APPLICATIONS

Point-of-Load Regulation
Notebook Computers
Portable Instruments
Distributed Power Systems

Part Models: 10
1ku List Price: Starting From $4.13

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
LTC3412AEFE#PBF	16-Lead TSSOP w/ EP	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LTC3412AEFE#TRPBF	16-Lead TSSOP w/ EP	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LTC3412AEUF#PBF	16-Lead QFN (4mm x 4mm x 0.75mm w/ EP)	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LTC3412AEUF#TRPBF	16-Lead QFN (4mm x 4mm x 0.75mm w/ EP)	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LTC3412AIFE#PBF	16-Lead TSSOP w/ EP	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LTC3412AIFE#TRPBF	16-Lead TSSOP w/ EP	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LTC3412AIUF#PBF	16-Lead QFN (4mm x 4mm x 0.75mm w/ EP)	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LTC3412AIUF#TRPBF	16-Lead QFN (4mm x 4mm x 0.75mm w/ EP)	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LTC3412AMPFE#PBF	16-Lead TSSOP w/ EP	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LTC3412AMPFE#TRPBF	16-Lead TSSOP w/ EP	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys

Part Models	Product Lifecycle	PCN

Apr 6, 2022 - 22_0068 Laser Top Mark for ETSSOP and TSSOP Packages Assembled in ADPG [PNG] and UTL
		PCN22_0068_Form Material_Report Delta Qualification Matrix
LTC3412AEFE#PBF	PRODUCTION
LTC3412AEFE#TRPBF	PRODUCTION
LTC3412AIFE#PBF	PRODUCTION
LTC3412AIFE#TRPBF	PRODUCTION
LTC3412AMPFE#PBF	PRODUCTION
LTC3412AMPFE#TRPBF	PRODUCTION

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
Oscillators 1
LTC6908		Resistor Set SOT-23 Oscillator with Spread Spectrum Modulation
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

Parts	Product Life Cycle	Description
LTC3612	PRODUCTION	3A, 4MHz Monolithic Synchronous Step-Down DC/DC Converter

Tools & Simulations

LTspice 1

LTC3412A Demo Circuit - 3A, 4MHz, Monolithic Synchronous Step-down Regulator (3.3V to 1.8V @ 3A)

Models for the following parts are available in LTspice:

LTC3412
LTC3412A

LTpowerCAD 1

LTC3412A Project - 3A, 4MHz, Monolithic Buck Regulator (2.3-5.5V to 1.8V @ 3A)

Design tools for the following parts are available in LTpowerCAD:

LTC3412
LTC3412A

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

LTC3412AEFE Demo Board

Buy Now View Details

Product Details

DC652A: Demo Board for the LTC3412A 3A, 4MHz, Monolithic Synchronous Step-Down Regulator.

Resources

DC652A - Design File
9/24/2009

DC652A - Demo Manual
9/24/2009

DC652A - Schematic
9/24/2009

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