LTC3732

PRODUCTION

LTC3732

3-Phase, 5-Bit VID, 600kHz, Synchronous Buck Switching Regulator Controller

PRODUCTION

Figure 1. High Current Triple Phase Step-Down Converter slide

Figure 1. High Current Triple Phase Step-Down Converter

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Part Models 4

1ku List Price Starting From $5.24

Features

3-Phase Controller with Onboard MOSFET Drivers
±5% Output Current Matching Optimizes Thermal Performance and Size of Inductors and MOSFETs
4.5V </= V_CC </= 7V; 4.5V </= V_IN </= 32V
Differential Amplifier Accurately Senses V_OUT
Reduced Input and Output Capacitance
Reduced Power Supply Induced Noise
VID DAC Programmable from 1.1V to 1.85V (VRM9.0/9.1)
±10% Power Good Output Indicator
250kHz to 600kHz Per Phase, PLL, Fixed Frequency
PWM, Stage Shedding^™ or Burst Mode^® Operation
OPTI-LOOP^® Compensation Minimizes C_OUT
Adjustable Soft-Start Current Ramping
Short-Circuit Shutdown Timer with Defeat Option
Overvoltage Soft Latch
Small 36-Lead Narrow (0.209 inch) SSOP Package
QFN 5mm x 7mm 38-Lead Package

Additional Details

The LTC3732 is a PolyPhase^® synchronous step-down switching regulator controller that drives all N-channel external power MOSFET stages in a phase-lockable fixed frequency architecture. The 3-phase controller drives its output stages with 120° phase separation at frequencies of up to 600kHz per phase to minimize the RMS current losses in both the input and output filter capacitors. The 3-phase technique effectively triples the fundamental frequency, improving transient response while operating each controller at an optimal frequency for high efficiency and ease of thermal design. Light load efficiency is optimized by using a choice of output Stage Shedding or Burst Mode technology.

A differential amplifier provides true remote sensing of both the high and low side of the output voltage at load points.

Soft-start and a defeatable, timed short-circuit shutdown protect the MOSFETs and the load. A foldback current circuit also provides protection for the external MOSFETs under short-circuit or overload conditions.

Applications

Desktop Computers
High Performance Notebook Computers
High Output Current DC/DC Power Supplies

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Ask a Question

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Support

Analog Devices Support Portal is a one-stop shop to answer all your ADI questions.

Visit the ADI Support Page

Ask the ADI community for help.

Ask the EngineerZone Community

FAQs

Sales & Ordering FAQs

Part Models 4

1ku List Price Starting From $5.24

Technical Documents 4

LTC3732: 3-Phase, 5-Bit VID, 600kHz, Synchronous Buck Switching Regulator Controller Data Sheet 08/23/2007

R384 Reliability Data 03/26/2018

DC440A - Demo Manual 09/24/2009

High Performance 3-Phase Power Supplies Yields High Efficiency over the Entire CPU Load Range 03/01/2003

Design Resources 4

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
LTC3732CG#PBF	36-Lead SSOP	HTML Material Declaration HTML Reliablity Data	Ultra Librarian SamacSys
LTC3732CG#TRPBF	36-Lead SSOP	HTML Material Declaration HTML Reliablity Data	Ultra Librarian SamacSys
LTC3732CUHF#PBF	38-Lead QFN (5mm x 7mm w/ EP)	HTML Material Declaration HTML Reliablity Data	Ultra Librarian SamacSys
LTC3732CUHF#TRPBF	38-Lead QFN (5mm x 7mm w/ EP)	HTML Material Declaration HTML Reliablity Data	Ultra Librarian SamacSys

LTC3732CG#PBF
Pin/Package Drawing
36-Lead SSOP
Documentation

HTML Material Declaration

HTML Reliablity Data

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

LTC3732CG#TRPBF
Pin/Package Drawing
36-Lead SSOP
Documentation

HTML Material Declaration

HTML Reliablity Data

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

LTC3732CUHF#PBF
Pin/Package Drawing
38-Lead QFN (5mm x 7mm w/ EP)
Documentation

HTML Material Declaration

HTML Reliablity Data

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

LTC3732CUHF#TRPBF
Pin/Package Drawing
38-Lead QFN (5mm x 7mm w/ EP)
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

Nov 18, 2019

- 19_0266

Laser Top Mark for SSOP36/44/48 Packages assembled in ADPG and UTAC

LTC3732CG#PBF

PRODUCTION

LTC3732CG#TRPBF

PRODUCTION

pdf

PCN19_0266_Form

xls

Material_Report

Detailed Parts List

Filter by Model

Part Models

Product Lifecycle

PCN

Nov 18, 2019

- 19_0266

Laser Top Mark for SSOP36/44/48 Packages assembled in ADPG and UTAC

LTC3732CG#PBF

PRODUCTION

LTC3732CG#TRPBF

PRODUCTION

pdf

PCN19_0266_Form

xls

Material_Report

Detailed Parts List

Companion Parts 4

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
Dual-Supply Monitors1
LTC2960	RECOMMENDED FOR NEW DESIGNS	36V Nano-Current Two-Input Voltage Monitor
Multiple Output Buck Regulators1
LTC3880	RECOMMENDED FOR NEW DESIGNS	Dual Output PolyPhase Step-Down DC/DC Controller with Digital Power System Management
Surge Stopper, Overvoltage, and Overcurrent Protection1
LT4363	RECOMMENDED FOR NEW DESIGNS	High Voltage Surge Stopper with Current Limit

DC440A

LTC3732CG | 3-Phase, CPU Core Power Supply, 5V to 20V Input, VRM9.0 @ 65A Max

DC440A

LTC3732CG | 3-Phase, CPU Core Power Supply, 5V to 20V Input, VRM9.0 @ 65A Max

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Product Detail

DC440A: Demo Board for the LTC3732 3-Phase, 5-Bit VID, 600kHz, Synchronous Buck Switching Regulator Controller.

Resources

PDF

DC440A - Schematic

71.00K

ZIP

DC440A - Design File

1.00M

PDF

DC440A - Demo Manual

615.00K

DC440A

LTC3732CG | 3-Phase, CPU Core Power Supply, 5V to 20V Input, VRM9.0 @ 65A Max

LTspice 1

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