LTC3701

PRODUCTION

LTC3701

2-Phase, Low Input Voltage, Dual Step-Down DC/DC Controller

PRODUCTION

Figure 1. High Efficiency 2-Phase 550kHz Dual Step-Down Converter slide

Figure 1. High Efficiency 2-Phase 550kHz Dual Step-Down Converter

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1ku List Price Starting From $4.49

Features

Out-of-Phase Controllers Reduce Required Input Capacitance
True PLL for Frequency Locking or Frequency Adjustment
Operating Frequency Range: 300kHz to 750kHz
Wide V_IN Range: 2.5V to 10V
Constant Frequency Current Mode Architecture
Low Dropout: 100% Duty Cycle
Power Good Output Voltage Monitor
Internal Soft-Start Circuitry
Selectable Burst Mode^®/Pulse Skipping Operation at Light Loads
Output Overvoltage Protection
Low Quiescent Current: 460µA
0.8V ±2% Voltage Reference
Small 16-Lead Narrow SSOP Package

Additional Details

The LTC3701 is a 2-phase dual constant frequency current mode step-down DC/DC controller providing excellent load and line regulation. Power loss and noise due to ESR of the input capacitor are minimized by operating the two controller output stages out-of-phase.

The LTC3701 provides a 0.8V ±2% voltage reference and consumes only 460µA of quiescent current. To further maximize the life of a battery source, the external P-channel MOSFET is turned on continuously in dropout (100% duty cycle).

Switching frequency is internally set at 550kHz, allowing the use of small inductors and capacitors. For noise sensitive applications, the LTC3701 can be externally synchronized using its phase-locked loop. The frequency can also be externally set from 300kHz to 750kHz by applying a voltage to the PLLLPF pin. Burst Mode operation is inhibited during synchronization or when the EXTCLK/MODE pin is pulled low to reduce noise and RF interference.

The LTC3701 contains independent internal soft-start circuitry for each controller. Other features include a power good output voltage monitor and output overvoltage and short-circuit protection.

The LTC3701 is available in a small footprint 16-lead narrow SSOP package.

Applications

One or Two Lithium-Ion Powered Applications
Notebook and Handheld Computers
Personal Digital Assistants
Portable Instruments
Distributed DC Power Systems

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FAQs

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Part Models 2

1ku List Price Starting From $4.49

Technical Documents 4

LTC3701: 2-Phase, Low Input Voltage, Dual Step-Down DC/DC Controller Data Sheet 08/28/2007

R421 Reliability Data 03/23/2018

DC424A - Demo Manual 09/24/2009

Dual DC/DC Controller Brings 2-Phase Benefits to Low Input Voltage Applications 05/01/2002

Design Resources 2

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
LTC3701EGN#PBF	16-Lead SSOP (Narrow 0.15 Inch)	HTML Material Declaration HTML Reliablity Data	Ultra Librarian SamacSys
LTC3701EGN#TRPBF	16-Lead SSOP (Narrow 0.15 Inch)	HTML Material Declaration HTML Reliablity Data	Ultra Librarian SamacSys

LTC3701EGN#PBF
Pin/Package Drawing
16-Lead SSOP (Narrow 0.15 Inch)
Documentation

HTML Material Declaration

HTML Reliablity Data

CAD Symbols, Footprints, and 3D Models
Ultra Librarian
SamacSys

LTC3701EGN#TRPBF
Pin/Package Drawing
16-Lead SSOP (Narrow 0.15 Inch)
Documentation

HTML Material Declaration

HTML Reliablity Data

CAD Symbols, Footprints, and 3D Models
Ultra Librarian
SamacSys

PCN/PDN Information

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Part Models

Product Lifecycle

PCN

Oct 3, 2024

- 24_0235

(QSOP/SSOP PKG) Migrating Bottom Trace Code Marking to Top Side Laser Marking

LTC3701EGN#PBF

PRODUCTION

LTC3701EGN#TRPBF

PRODUCTION

pdf

PCN24_0235_Form

xls

Material_Report

pdf

Other

xlsm

Delta Qualification Matrix

Oct 11, 2022

- 22_0235

Epoxy Change from Henkel 8290 to 8290A for GN Package

LTC3701EGN#PBF

PRODUCTION

LTC3701EGN#TRPBF

PRODUCTION

pdf

PCN22_0235_Form

xls

Material_Report

pdf

Qualification Results Summary

xlsm

Delta Qualification Matrix

Apr 6, 2022

- 22_0066

Laser Top Mark for 16QSOP Assembled in ADPG [PNG]

LTC3701EGN#PBF

PRODUCTION

LTC3701EGN#TRPBF

PRODUCTION

pdf

PCN22_0066_Form

xls

Material_Report

xlsm

Delta Qualification Matrix

Filter by Model

Part Models

Product Lifecycle

PCN

Oct 3, 2024

- 24_0235

(QSOP/SSOP PKG) Migrating Bottom Trace Code Marking to Top Side Laser Marking

LTC3701EGN#PBF

PRODUCTION

LTC3701EGN#TRPBF

PRODUCTION

pdf

PCN24_0235_Form

xls

Material_Report

pdf

Other

xlsm

Delta Qualification Matrix

Oct 11, 2022

- 22_0235

Epoxy Change from Henkel 8290 to 8290A for GN Package

LTC3701EGN#PBF

PRODUCTION

LTC3701EGN#TRPBF

PRODUCTION

pdf

PCN22_0235_Form

xls

Material_Report

pdf

Qualification Results Summary

xlsm

Delta Qualification Matrix

Apr 6, 2022

- 22_0066

Laser Top Mark for 16QSOP Assembled in ADPG [PNG]

LTC3701EGN#PBF

PRODUCTION

LTC3701EGN#TRPBF

PRODUCTION

pdf

PCN22_0066_Form

xls

Material_Report

xlsm

Delta Qualification Matrix

Companion Parts 2

Parts	Product Life Cycle	Description
Digital Power System Managers1
LTC2974	RECOMMENDED FOR NEW DESIGNS	4-Channel PMBus Power System Manager Featuring Accurate Output Current Measurement
Multiple Output Buck Regulators1
LTC3880	RECOMMENDED FOR NEW DESIGNS	Dual Output PolyPhase Step-Down DC/DC Controller with Digital Power System Management

DC424A

LTC3701EGN | 2-Phase Dual Step-Down Converter, 2.5V~9.8VIN, 2.5V @ 1.6A and 1.8V @ 1.6A

DC424A

LTC3701EGN | 2-Phase Dual Step-Down Converter, 2.5V~9.8VIN, 2.5V @ 1.6A and 1.8V @ 1.6A

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Product Detail

DC424A: Demo Board for the LTC3701 - 2-Phase, Low Input Voltage, Dual Step-Down DC/DC Controller.

Resources

PDF

DC424A - Schematic

25.00K

PDF

DC424A - Demo Manual

163.00K

ZIP

DC424A - Design File

338.00K

DC424A

LTC3701EGN | 2-Phase Dual Step-Down Converter, 2.5V~9.8VIN, 2.5V @ 1.6A and 1.8V @ 1.6A

LTspice 1

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