LT3570

PRODUCTION

1.5A Buck Converter, 1.5A Boost Converter and LDO Controller

Data Sheet Product Selection Table

Part Models: 8
1ku List Price: Starting From $3.54

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Part Details

2.5V to 36V Input Voltage Range
Programmable Switching Frequency from 500kHz to 2.1MHz
Synchronizable Up to 2.75MHz
V_OUT(MIN): 0.8V
Independent Soft-Start for Each Converter
Separate V_IN Supplies for Each Converter
Duty Cycle Range: 0% to 90% at 1MHz
Available in 24-Lead (4mm × 4mm) QFN and 20-Lead TSSOP Packages

Part Models: 8
1ku List Price: Starting From $3.54

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
LT3570EFE#PBF	TSSOP W/ THERMAL PAD	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LT3570EFE#TRPBF	TSSOP W/ THERMAL PAD	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LT3570EUF#PBF	LFCSP:LEADFRM CHIP SCALE	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LT3570EUF#TRPBF	LFCSP:LEADFRM CHIP SCALE	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LT3570IFE#PBF	TSSOP W/ THERMAL PAD	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LT3570IFE#TRPBF	TSSOP W/ THERMAL PAD	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LT3570IUF#PBF	LFCSP:LEADFRM CHIP SCALE	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LT3570IUF#TRPBF	LFCSP:LEADFRM CHIP SCALE	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
LT3570EFE#PBF	PRODUCTION
LT3570EFE#TRPBF	PRODUCTION
LT3570IFE#PBF	PRODUCTION
LT3570IFE#TRPBF	PRODUCTION
Feb 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
LT3570EUF#PBF	PRODUCTION
LT3570EUF#TRPBF	PRODUCTION
LT3570IUF#PBF	PRODUCTION
LT3570IUF#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
Oscillators 1
LTC6909	PRODUCTION	1 to 8 Output, Multiphase Silicon 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
Protection Switches & Controllers 1
LT4363	RECOMMENDED FOR NEW DESIGNS	High Voltage Surge Stopper with Current Limit

Tools & Simulations

LTspice 1

LT3570 Demo Circuit - 1.5A Buck, 1.5A Boost & LDO Converters (5V to 3.3V @ 1A, 12V @ 400mA & 2.5V @ 100mA)

Models for the following parts are available in LTspice:

LT3570

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

LT3570EUF Demo Board | Buck + Boost + LDO Controller, 4V to 36VIN Buck with VOUT1 = 3.3V@1A, 3.3V to 10VIN Boost with VOUT2 = 12V@275mA, 100mA LDO

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Product Details

Demonstration circuit 1106 is a 1.5A Buck Converter, 1.5A Boost Converter, and LDO Controller featuring the LT3570. The Buck is designed to convert a 4V to 36V source to 3.3V at 1A. The LDO is powered from the output of the buck and converts 3.3V to 2.5V at 100mA. The boost converts a 3.3V to 10V source to 12V at 275mA.

Resources

DC1106A - Schematic
9/24/2009

DC1106A - Design File
9/24/2009

DC1106A - Demo Manual
9/24/2009

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