LTC3375 - 8-Channel Programmable, Parallelable 1A Buck DC/DCs

Features

  • 8-Channel Independent Step-Down DC/DCs
  • Master-Slave Configurable for Up to 4A Per Output Channel with a Single Inductor
  • Independent VIN Supply for Each DC/DC (2.25V to 5.5V)
  • All DC/DCs Have 0.425V to VIN Output Voltage Range
  • Precision Enable Pin Thresholds for Autonomous Sequencing (or I2C Control)
  • 1MHz to 3MHz Programmable/Synchronizable Oscillator Frequency (2MHz Default)
  • I2C Selectable Phasing (90° Steps) Per Channel
  • Programmable Power-On Reset/Watch Dog/Pushbutton Timing
  • Die Temperature Monitor Output
  • 48-Lead (7mm × 7mm) QFN Package
Designed for Automotive and Transportation Applications
AEC-Q100 data available for specific packages


Typical Application

LTC3375 Typical Application
LTC3375 Typical Application

Description

The LTC®3375 is a digitally programmable high efficiency multioutput power supply IC. The DC/DCs consist of eight synchronous buck converters (IOUT up to 1A each) all powered from independent 2.25V to 5.5V input supplies.

DC/DC enables, output voltages, operating modes, and phasing may all be independently programmed over I2C or used in standalone mode via simple I/O with power-up defaults. The DC/DCs may be used independently or in parallel to achieve higher output currents of up to 4A per output with a shared inductor. Alarm levels for high die temperature may also be programmed via I2C with a maskable IRQ output for monitoring DC/DC and system faults.

Pushbutton ON/OFF/RESET control, power-on reset, and a watchdog timer provide flexible and reliable power-up sequencing and system monitoring. The LTC3375 is available in a low profile 48-lead 7mm × 7mm QFN package.

Packaging

For complete and up to date package information and drawings, please refer to our packaging page

Part Number Package Code Temp Package
Drawing
RoHS
LTC3375EUK#PBF 7x7 QFN-48 UK E 05-08-1704 Yes
LTC3375EUK#TRPBF 7x7 QFN-48 UK E 05-08-1704 Yes
LTC3375HUK#PBF 7x7 QFN-48 UK H 05-08-1704 Yes
LTC3375HUK#TRPBF 7x7 QFN-48 UK H 05-08-1704 Yes
LTC3375IUK#PBF 7x7 QFN-48 UK I 05-08-1704 Yes
LTC3375IUK#TRPBF 7x7 QFN-48 UK I 05-08-1704 Yes


LTC3375 Package Drawing

Order Info

  • Part numbers ending in PBF are lead free. Solder plated terminal finish (SnPb) versions are non-standard and special terms and conditions and pricing applies if available. Please contact LTC marketing for information.
  • Part numbers containing TR or TRM are shipped in tape and reel or 500 unit mini tape and reel, respectively
  • Please refer to our general ordering information or the product datasheet for more details

Package Variations and Pricing

Part Number Package Temp Price
(1-99)
Price
(1k)*
RoHS
LTC3375EUK#PBF 7x7 QFN-48 E $7.79 $5.45 Yes
LTC3375EUK#TRPBF 7x7 QFN-48 E $5.51 Yes
LTC3375HUK#PBF 7x7 QFN-48 H $9.50 $6.65 Yes
LTC3375HUK#TRPBF 7x7 QFN-48 H $6.71 Yes
LTC3375IUK#PBF 7x7 QFN-48 I $9.00 $6.30 Yes
LTC3375IUK#TRPBF 7x7 QFN-48 I $6.36 Yes
Buy NowRequest Samples
* The USA list pricing shown is for BUDGETARY USE ONLY, shown in United States dollars (FOB USA per unit for the stated volume), and is subject to change. International prices may differ due to local duties, taxes, fees and exchange rates. For volume-specific price or delivery quotes, please contact your local Linear Technology sales office or authorized distributor.

Demo Boards

Linear Technology offers many demo boards free of charge to qualified customers. Contact your local sales office or distributor to inquire about a demo board. Certain demo boards are also available for sale via credit card on this website. Demo boards are for evaluation purposes only. It remains the customer’s responsibility to verify proper and reliable operation in the actual end application.

Part Number Description Price Documentation
DC1921A LTC3375EUK Demo Board 8-Channel Programmable, Parallelable, 1A Buck DC/DCs (DC590 Companion board) $175.00
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Companion Boards

Part Number Description Price Documentation
DC590B Isolated USB Serial Controller for Linear Technology QuikEval-Compatible Demo Boards $50.00
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Click here to view our complete list of demo boards

Designed for Automotive and Transportation Appications

AEC-Q100 data is available for these specific part numbers. Please contact your local sales representative for more information regarding reliability reports or to inquire about parts that are not included. For more information, view our Automotive and Transportation page

Part Number Package Temp Price
(1-99)
Price
(1k)*
RoHS
LTC3375HUK#PBF 7x7 QFN-48 H $9.50 $6.65 Yes
LTC3375HUK#TRPBF 7x7 QFN-48 H $6.71 Yes
LTC3375IUK#PBF 7x7 QFN-48 I $9.00 $6.30 Yes
LTC3375IUK#TRPBF 7x7 QFN-48 I $6.36 Yes
Buy NowRequest Samples
* The USA list pricing shown is for BUDGETARY USE ONLY, shown in United States dollars (FOB USA per unit for the stated volume), and is subject to change. International prices may differ due to local duties, taxes, fees and exchange rates. For volume-specific price or delivery quotes, please contact your local Linear Technology sales office or authorized distributor.

Applications

  • General Purpose Multichannel Power Supplies
  • Industrial/Automotive/Communications

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Design Tools

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