LTC3406AB-2

PRODUCTION

2.25MHz, 600mA Synchronous Step-Down Regulator in ThinSOT

Part Models: 2
1ku List Price: Starting From $2.21

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Overview

High Efficiency: Up to 96%
600mA Output Current
2.5V to 5.5V Input Voltage Range
2.25MHz Constant Frequency Operation
No Schottky Diode Required
Low Dropout Operation: 100% Duty Cycle
±2% Output Voltage Accuracy
Low Quiescent Current: 200µA

0.6V Reference Allows Low Output Voltages
Shutdown Mode Draws <1µA Supply Current
Internal Soft-Start Limits Inrush Current
Current Mode Operation for Excellent Line and Load Transient Response
Overtemperature Protected
Low Profile (1mm) ThinSOT^™ Package

The LTC3406AB-2 is a high efficiency monolithic synchronous buck regulator using a constant frequency, current mode architecture. Supply current with no load is 200µA and drops to <1µA in shutdown. The 2.5V to 5.5V input voltage range makes the LTC3406AB-2 ideally suited for single Li-Ion battery-powered applications. 100% duty cycle provides low dropout operation, extending battery life in portable systems. PWM pulse skipping mode operation provides very low output ripple voltage for noise sensitive applications.

Switching frequency is internally set at 2.25MHz, allowing the use of small surface mount inductors and capacitors. The internal synchronous switch increases efficiency and eliminates the need for an external Schottky diode. Low output voltages are easily supported with the 0.6V feedback reference voltage. The LTC3406AB-2 is available in a low profile (1mm) ThinSOT package. Refer to LTC3406A for applications that require Burst Mode^® operation.


	V_OUT	F_SW	Features
LTC3406	Adj.	1.5MHz	Burst Mode
LTC3406-1.2	1.2V	1.5MHz	Burst Mode
LTC3406-1.5	1.5V	1.5MHz	Burst Mode
LTC3406-1.8	1.8V	1.5MHz	Burst Mode
LTC3406B	Adj.	1.5MHz	Burst Mode Disabled
LTC3406B-1.2	1.2V	1.5MHz	Burst Mode Disabled
LTC3406B-2	Adj.	2.25MHz	Burst Mode Disabled
LTC3406A	Adj.	1.5MHz	Low Ripple Burst Mode
LTC3406AB	Adj.	1.5MHz	Burst Mode Disabled
LTC3406AB-2	Adj.	2.25MHz	Burst Mode Disabled

Applications

Cellular Telephones
Personal Navigation Devices
Wireless and DSL Modems
Digital Still Cameras
Media Players
Portable Instruments

Part Models: 2
1ku List Price: Starting From $2.21

Documentation

Data Sheet 1

LTC3406AB-2: 2.25MHz, 600mA Synchronous Step-Down Regulator in ThinSOT Data Sheet 09/11/2015

Reliability Data 1

R415 Reliability Data 03/23/2018

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
LTC3406ABES5-2#TRMPBF	5-Lead TSOT-23	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LTC3406ABES5-2#TRPBF	5-Lead TSOT-23	Material Declaration Reliablity Data 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
Protection Switches & Controllers 1
LTC4365	RECOMMENDED FOR NEW DESIGNS	Overvoltage, Undervoltage and Reverse Supply Protection Controller
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

Models for the following parts are available in LTspice:

LTC3406
LTC3406-1.2
LTC3406-1.5
LTC3406-1.8
LTC3406A
LTC3406AB
LTC3406B
LTC3406B-1.2
LTC3406B-1.5
LTC3406B-1.8
LTC3406B-2

LTpowerCAD

Design tools for the following parts are available in LTpowerCAD:

LTC3406
LTC3406-1.2
LTC3406-1.5
LTC3406-1.8
LTC3406B
LTC3406B-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.

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