LTC3376

RECOMMENDED FOR NEW DESIGNS

20V, 4-Channel Buck DC/DC with 8x Configurable 1.5A Power Stages

Data Sheet (Rev. 0) Product Selection Table

Part Models: 2
1ku List Price: Starting From $6.09

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Overview

Wide V_IN Range: 3V to 20V
Wide V_OUT Range: 0.4V to 0.83 • V_IN
8× 1.5A Buck Power Stages Configurable as 1 to 4 Output Channels
15 Unique Pin Selectable Output Configurations (1.5A to 12A per Channel)
Internal Boost Capacitors for Reduced PCB Space
No Load I_Q 27µA 1 Buck Enabled; 42µA All Bucks Enabled
1% V_OUT Accuracy on All Channels

Peak Current Mode Control (Burst Mode^® Operation/Forced Continuous)
Precision RUN Inputs, Individual PGOOD Outputs for Power Sequencing
1MHz to 3MHz Frequency (RT Programmable, PLL SYNC, or Internal 2MHz Oscillator)
TEMP Pin Output Indicates Die Temperature
Output Current Monitors
Differential Output Sense

The LTC3376 is a highly flexible multioutput power supply IC. The device includes four synchronous buck converters, configured to share eight 1.5A power stages, powered from independent 3V to 20V inputs. The DC/DCs are assigned to one of fifteen power configurations via pin strappable CFG0 to CFG3 pins. The LTC3376 includes the integration of ceramic capacitors into the package for the BST pins thereby saving PCB space. The common buck switching frequency may be programmed with an external resistor, synchronized to an external oscillator, or set to a default internal 2MHz clock.

The operating mode for all DC/DCs may be programmed via the SYNC/MODE pin for Burst Mode or forced continuous mode operation. The PGOOD1 to PGOOD4 outputs indicate when each enabled DC/DC is within a specified percentage of its final output.

Current monitors allow for external monitoring of each buck’s load. The EXTV_CC pin allows for the internal circuitry to run from a 3V to 5.5V rail for improved efficiency.

Precision RUN pin thresholds facilitate power-up sequencing. The LTC3376 is available in a 64 lead 7mm × 7mm BGA (0.8mm ball pitch).

Applications

Telecom/Industrial
12V Distributed Power Systems

Part Models: 2
1ku List Price: Starting From $6.09

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
LTC3376EY#PBF	64-Lead BGA (7mm x 7mm x 1.34mm)	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LTC3376IY#PBF	64-Lead BGA (7mm x 7mm x 1.34mm)	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys

Part Models	Product Lifecycle	PCN

Jul 21, 2021 - 21_0159 Ink Mark to Laser Mark Conversion for µModule
		PCN21_0159_Form Material_Report Delta Qualification Matrix
LTC3376EY#PBF	PRODUCTION
LTC3376IY#PBF	PRODUCTION
Apr 25, 2020 - 20_0123 Micro-Module, Test Site Transfer from Analog Devices Singapore to Analog Devices Penang, Malaysia
		PCN20_0123_Form Material_Report Test Correlation Report Other Qualification Results Summary
LTC3376EY#PBF	PRODUCTION
LTC3376IY#PBF	PRODUCTION

This is the most up-to-date revision of the Data Sheet.

Software Resources

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Tools & Simulations

LTspice

Models for the following parts are available in LTspice:

LTC3376

LTpowerCAD 1

LTC3376 Project - DC2966A 4 Output Configuration (0000). 7-12Vin to 5Vout1/3A, 3.3Vout2/3A, 2.5Vout3/3A, 1.8Vout4/3A, 2MHz

Design tools for the following parts are available in LTpowerCAD:

LTC3376

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.

LTpowerCAD^® is a power supply design program which selects power stage components, provides detailed power efficiency, shows quick loop Bode plot stability and load transient analysis, and can export to LTspice for simulation.

Evaluation Kits

LTC3376 Demo Board | 20V, 4-Channel Buck DC/DC with 8x Configurable 1.5A Power Stages (Configuration CFG[3:0] = 0000)

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Product Details

Demonstration Circuit DC2966A shows the LTC3376 4-channel configurable buck regulator operating in configuration CFG[3:0] = 0000. This sets the LTC3376 to operate as a quad buck with all four possible outputs, each capable of 3A. By default, outputs 1-4 are set at 5V, 3.3V, 2.5V, and 1.8V, respectively.

Outputs can be enabled, disabled, or sequenced individually. By default, all channel inputs are separate but the board can be configured to power all or some channels from a common input. Each channel has a PGOOD LED indicator to show that its output is regulating within the desired range. Switching operation can allow burst mode for high-efficiency operation at low load currents but can also be forced to continuous PWM for more deterministic EMI.

The PCB is laid out on 6 layers and the demonstration circuit provides access to all features of the LTC3376.