LT3742

PRODUCTION

Dual, 2-Phase Step-Down Switching Controller

Data Sheet Product Selection Table

Part Models: 2
1ku List Price: Starting From $2.78

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Part Details

Wide Input Voltage Range: 4V to 30V
Wide Output Voltage Range: 0.8V to V_IN
Low Shutdown I_Q: 20μA
Out-of-Phase Controllers Reduce Required Input Capacitance and Power Supply Induced Noise
0.8V ±1.5% Voltage Reference
500kHz Current Mode Fixed Frequency Operation
Internal Boost Converter Provides Bias Rail for N-Channel MOSFET Gate Drive
Power Good Voltage Monitor for Each Output
Programmable Soft-Start
24-Lead 4mm × 4mm × 0.75mm Package

Part Models: 2
1ku List Price: Starting From $2.78

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
LT3742EUF#PBF	LFCSP:LEADFRM CHIP SCALE	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LT3742EUF#TRPBF	LFCSP:LEADFRM CHIP SCALE	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys

Part Models	Product Lifecycle	PCN

Feb 14, 2025 - 25_0016 Bond Wire Change from Gold to Copper Wire (Notification Only)
		PCN25_0016_Form Material_Report Qualification Results Summary
LT3742EUF#PBF	PRODUCTION
LT3742EUF#TRPBF	PRODUCTION
Jan 20, 2022 - 21_0269 Addition of Alternate Assembly Site ASE Taiwan for Select LFCSP Products
		PCN21_0269_Form Material_Report Detailed Change Description Qualification Results Summary
LT3742EUF#PBF	PRODUCTION
LT3742EUF#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
Circuit Monitors 1
LTC2960	RECOMMENDED FOR NEW DESIGNS	36V Nano-Current Two-Input Voltage Monitor
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
LT4363	RECOMMENDED FOR NEW DESIGNS	High Voltage Surge Stopper with Current Limit
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 1

LT3742 Demo Circuit - Dual, 2-Phase Step-Down Controller (14V to 8V @ 4A & 5V @ 4A)

Models for the following parts are available in LTspice:

LT3742

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

LT3742EFE Demo Board | 5.5V ≤ VIN ≤ 28V, VOUT1 = 5V @ 4A, VOUT2 = 3.3V @ 4A

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Product Details

Demonstration circuit 927 is a dual output step-down converter featuring the LT3742, a two-phase nonsynchronous buck controller. The demo board operates with a 5.5V to 28V input suppy and provides outputs of 5V@4A and 3.3V@4A.

Resources

DC927A - Design File
9/24/2009

DC927A - Schematic
9/24/2009

DC927A - Demo Manual
9/24/2009

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