LTC3828

PRODUCTION

LTC3828

Dual, 2-Phase Step-Down Controller with Tracking

PRODUCTION

High Efﬁciency Dual 2.5V/3.3V Step-Down Converter with Tracking slide

High Efﬁciency Dual 2.5V/3.3V Step-Down Converter with Tracking

Not the part you were looking for?

Go to Product Selection Table

View All Documentation

Ask a Question

Submit your question below and we will return the best answer from ADI’s knowledge database:

Other places you can find help

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 $5.60

Features

Dual, 180° Phased Controllers Reduce Required Input Capacitance and Power Supply Induced Noise
Tracking for Both Outputs
Constant Frequency Current Mode Control
Wide V_IN Range: 4.5V to 28V Operation
Power Good Output Voltage Indicator
Adjustable Soft-Start Current Ramping
Foldback Output Current Limiting-Disabled at Start-Up
No Reverse Current During Soft-Start Interval
Clock Output for 3-, 4-, 6-Phase Operation
Dual N-Channel MOSFET Synchronous Drive
±1% Output Voltage Accuracy
Phase-Lockable Fixed Frequency 260kHz to 550kHz
OPTI-LOOP^® Compensation Minimizes C_OUT
Very Low Dropout Operation: 99% Duty Cycle
Output Overvoltage Protection
Small 28-Lead SSOP and 5mm × 5mm QFN Packages

Additional Details

The LTC3828 is a dual high performance step-down switching regulator controller that drives all N-channel synchronous power MOSFET stages. A constant frequency current mode architecture allows for a phase-lockable frequency of up to 550kHz. The TRCKSS pin provides both soft-start and tracking functions. Multiple LTC3828s can be daisy-chained in applications requiring more than two voltages to be tracked.

OPTI-LOOP compensation allows the transient response to be optimized over a wide range of output capacitance and ESR values. The precision 0.8V reference and power good output indicator are compatible with a wide 4.5V to 28V (30V maximum) input supply range, encompassing all battery chemistries.

The RUN pins control their respective channels independently. The FCB/PLLIN pin selects among Burst Mode^® operation, skip-cycle mode and continuous current mode. Current foldback limits MOSFET dissipation during short-circuit conditions. Reverse current and current foldback functions are disabled during soft-start.

Applications

Telecom Infrastructure
ASIC Power Supply
Industry Equipment

View All Documentation

Ask a Question

Submit your question below and we will return the best answer from ADI’s knowledge database:

Other places you can find help

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 $5.60

Technical Documents 7

LTC3828: Dual, 2-Phase Step-Down Controller with Tracking Data Sheet 01/07/2009

R384 Reliability Data 03/26/2018

DC980A/DC980B - Demo Manual 11/09/2015

DC802A - Demo Manual 09/24/2009

DC884A - Demo Manual 09/24/2009

Design Solutions 10 - Active Voltage Positioning Reduces Output Capacitors 08/21/2007

Reduce the Size and Cost of High Current, High-Power-Density Systems with Tracking Dual, 2-Phase Constant Frequency Step-Down Regulator 09/01/2006

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
LTC3828EG#PBF	28-Lead SSOP	HTML Material Declaration HTML Reliablity Data	Ultra Librarian SamacSys
LTC3828EG#TRPBF	28-Lead SSOP	HTML Material Declaration HTML Reliablity Data	Ultra Librarian SamacSys
LTC3828EUH#PBF	32-Lead QFN (5mm x 5mm x 0.75mm w/ EP)	HTML Material Declaration HTML Reliablity Data	Ultra Librarian SamacSys
LTC3828EUH#TRPBF	32-Lead QFN (5mm x 5mm x 0.75mm w/ EP)	HTML Material Declaration HTML Reliablity Data	Ultra Librarian SamacSys

LTC3828EG#PBF
Pin/Package Drawing
28-Lead SSOP
Documentation

HTML Material Declaration

HTML Reliablity Data

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

LTC3828EG#TRPBF
Pin/Package Drawing
28-Lead SSOP
Documentation

HTML Material Declaration

HTML Reliablity Data

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

LTC3828EUH#PBF
Pin/Package Drawing
32-Lead QFN (5mm x 5mm x 0.75mm w/ EP)
Documentation

HTML Material Declaration

HTML Reliablity Data

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

LTC3828EUH#TRPBF
Pin/Package Drawing
32-Lead QFN (5mm x 5mm x 0.75mm w/ EP)
Documentation

HTML Material Declaration

HTML Reliablity Data

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

PCN/PDN Information

Filter by Model

Part Models

Product Lifecycle

PCN

Aug 6, 2022

- 22_0171

Laser Top Mark Conversion for SSOP Packages Assembled in PNG

LTC3828EG#PBF

PRODUCTION

LTC3828EG#TRPBF

PRODUCTION

pdf

PCN22_0171_Form

xls

Material_Report

xlsm

Delta Qualification Matrix

Jan 20, 2022

- 21_0269

Addition of Alternate Assembly Site ASE Taiwan for Select LFCSP Products

LTC3828EUH#PBF

PRODUCTION

LTC3828EUH#TRPBF

PRODUCTION

pdf

PCN21_0269_Form

xls

Material_Report

pdf

Detailed Change Description

pdf

Qualification Results Summary

Filter by Model

Part Models

Product Lifecycle

PCN

Aug 6, 2022

- 22_0171

Laser Top Mark Conversion for SSOP Packages Assembled in PNG

LTC3828EG#PBF

PRODUCTION

LTC3828EG#TRPBF

PRODUCTION

pdf

PCN22_0171_Form

xls

Material_Report

xlsm

Delta Qualification Matrix

Jan 20, 2022

- 21_0269

Addition of Alternate Assembly Site ASE Taiwan for Select LFCSP Products

LTC3828EUH#PBF

PRODUCTION

LTC3828EUH#TRPBF

PRODUCTION

pdf

PCN21_0269_Form

xls

Material_Report

pdf

Detailed Change Description

pdf

Qualification Results Summary

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
Silicon Oscillators1
LTC6908		Resistor Set SOT-23 Oscillator with Spread Spectrum Modulation
Surge Stopper, Overvoltage, and Overcurrent Protection1
LT4363	RECOMMENDED FOR NEW DESIGNS	High Voltage Surge Stopper with Current Limit

DC980A/B

LTC2970 Demo Board | Dual Power Supply Monitor and Margining Controller [Requires DC590]

Figure 2. Connecting DC980A/DC980B Boards and the DC590 I2C/Serial Controller

LTC2970 Demo Board | Dual Power Supply Monitor and Margining Controller [Requires DC590]

Download

DC980A/B

LTC2970 Demo Board | Dual Power Supply Monitor and Margining Controller [Requires DC590]

Buy Now View Details

Product Detail

The DC980A and DC980B are a demonstration system that showcases the LTC2970, a dual power supply monitor and margining controller with an I²C interface. The DC980A board contains the LTC2970 device and the DC980B board contains the LTC3828 dual DC/DC controller. The two boards interface to each other via a 20-pin connector. The DC980B board features the LTC3828 dual output, 2-phase synchronous buck regulator. The LTC2970’s two voltage-buffered, 8-bit IDACs allow highly accurate margining of the LTC3828’s output voltages. The IDACs can be configured to automatically servo the power supplies to a desired voltage using the ADC for feedback. The DC980B comes preconfigured with 3.3V and 5V power supply rail voltages.

Resources

PDF

DC980A - Schematic

45.00K

ZIP

DC980A/DC980B - Design Files

2.00M

PDF

DC980A/DC980B - Demo Manual

1.00M

PDF

DC980B - Schematic

79.00K

DC884A

LTC3828EUH Demo Board | 2-Phase, Tracking, 5V ≤ VIN ≤ 12V; VOUT1 = 2V @ 17A, VOUT2 = 1.5V @ 17A

DC884A

LTC3828EUH Demo Board | 2-Phase, Tracking, 5V ≤ VIN ≤ 12V; VOUT1 = 2V @ 17A, VOUT2 = 1.5V @ 17A

Buy Now View Details

Product Detail

Demonstration circuit 884 is a high current density supply featuring the LTC3828EUH, a dual-output, 2-phase synchronous buck controller. The input voltage of the demo board is from 4.5V to 15V. The outputs are 2V @ 17A and 1.5V @ 17A.

Resources

ZIP

DC884A - Design File

1.00M

PDF

DC884A - Demo Manual

439.00K

PDF

DC884A - Schematic

65.00K

DC802A

LTC3828EUH Demo Board | 2-Phase, Tracking, 7V ≤ VIN ≤ 21V; VOUT1 = 5V @ 5A, VOUT2 = 3.3V @ 5A

DC802A

LTC3828EUH Demo Board | 2-Phase, Tracking, 7V ≤ VIN ≤ 21V; VOUT1 = 5V @ 5A, VOUT2 = 3.3V @ 5A

Buy Now View Details

Product Detail

Demonstration circuit 802 features the LTC3828EUH, a dual-output, 2-phase synchronous buck controller. The input voltage range of the demo board is 7V to 21V. The outputs are 5V @ 5A and 3.3V @ 5A.

Resources

PDF

DC802A - Schematic

52.00K

PDF

DC802A - Demo Manual

139.00K

ZIP

DC802A - Design File

837.00K

DC980A/B

LTC2970 Demo Board | Dual Power Supply Monitor and Margining Controller [Requires DC590]

DC884A

LTC3828EUH Demo Board | 2-Phase, Tracking, 5V ≤ VIN ≤ 12V; VOUT1 = 2V @ 17A, VOUT2 = 1.5V @ 17A

DC802A

LTC3828EUH Demo Board | 2-Phase, Tracking, 7V ≤ VIN ≤ 21V; VOUT1 = 5V @ 5A, VOUT2 = 3.3V @ 5A

LTspice 1

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.

To launch ready-to-run LTspice demonstration circuits for this part:

Step 1: Download and install LTspice on your computer.

Step 2: Click on the link in the section below to download a demonstration circuit.

Step 3: If LTspice does not automatically open after clicking the link below, you can instead run the simulation by right clicking on the link and selecting “Save Target As.” After saving the file to your computer, start LTspice and open the demonstration circuit by selecting ‘Open’ from the ‘File’ menu.

Lt Spice

LTC3828 - Step-Down (Buck) Regulators

6.58 K

No discussions on ltc3828 yet. Have something to say?

Start a Discussion on EngineerZone

Part Details

Documentation

Software & Part Ecosystem

Evaluation Kit

Tools & Simulations

Latest Discussions

LTC3828

Features

Documentation

Data Sheet 1

Reliability Data 1

User Guide 3

Design Note 1

Technical Articles 1

Aug 6, 2022

Jan 20, 2022

Software & Part Ecosystem