LTM3360B

RECOMMENDED FOR NEW DESIGNS

5VIN, 33A High-Density Step-Down DC-to-DC μModule Regulator with I2C and Integrated Capacitors

Data Sheet (Rev. 0) Product Selection Table
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Overview

  • Highest Output Current to Total Solution Footprint (1A/mm2), Integrates all CINs, COUTs, and Inductors
  • Fast Transient Response
  • VIN Range: 2.9V to 5.5V
  • VOUT Range: 0.3V to 1V
  • Remote Differential Output Sense Pins
  • VOUT + DC accuracy: ±1%
  • I2C Serial Interface—Telemetry Readback Includesm VOUT, IOUT, VIN, and Die Temperature
  • Analog IMON pin for Output Current Monitoring
  • Fixed Clock Frequency of 5MHz, External SYNC from 4.5MHz to 5.5MHz
  • Parallel Operation: Multiphase up to 12 phases and Stackable to > 1000A
  • Advanced Thermally Enhanced 160-Lead, 6.55mm × 5mm × 3.31mm, BGA Package

The LTM®3360B is a high-current, high-density, lowvoltage buck power μModule® (micromodule) regulator optimized for high-output current applications. The 2.9V to 5.5V input voltage range accommodates an intermediate bus voltage (IBV) of 5V ±10% or 3.3V ±10%. The current output capability of 33A can be paralleled to provide >1000A in a multiphase, stacked from a main-tosubordinate device configuration. Regulated output voltages down to 0.3V are achieved using a current mode architecture, which is capable of small on-time at very high frequencies. Select an appropriate feedback resistor divider to configure the output voltage. The 0.3V (default) feedback voltage is 8-bit adjustable through an I2C for margining or dynamic voltage scaling. Keep the feedback voltage close to 0.3V for the best phase-margin voltage regulation loop. The high fixed clock frequency of 5MHz which is double the switching frequency of 2.5MHz each phase permits integration of input and output capacitors and a power inductor, resulting in the highest density of output current-to-board footprint achievable in the industry today with minimal external components required. The LTM3360B is offered in a ball grid array (BGA) package, 0.4mm ball pitch, with excellent thermal performance and integrated inductors, input, and output capacitors. The LTM3360B is lead(Pb)-free and RoHS-compliant.

APPLICATIONS

  • Data Centers xPU Core, Application-Specific Integrated Circuit (ASIC), Field-Programmable Gate Array (FPGA) Supplies
  • Optical Modules
  • Industrial and Communications
  • Distributed DC Point-of-Load (POL) Power Systems
LTM3360B
5VIN, 33A High-Density Step-Down DC-to-DC μModule Regulator with I2C and Integrated Capacitors
LTM3360B Typical Application LTM3360B Efficiency LTM3360B Simplified Block Diagram LTM3360B Pin Configuration LTM3360B Chip Illustration
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Documentation

Data Sheet 1

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Tools & Simulations

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Evaluation Kits

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EVAL-LTM3360B-AZ

LTM3360B: 5VIN, 33A High Density Step-Down DC-to-DC μModule Regulator with I2C and Integrated Capacitors

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Features and Benefits

  • Transient Circuit included for Transient Load Evaluation
  • External Clock Synchronization
  • GUI with LTpowerPlay Development Tool

Product Details

The EVAL-LTM3360B-AZ features the LTM3360B, a 5V high-density buck power μModule® regulator. The high switching frequency of 2.5MHz permits integration of not only the input and output capacitors but also the power inductor, resulting in the highest density of output current-to-PC board footprint achievable in the industry today with minimal external components required. The LTM3360B has the highest output current-to-total solution footprint density at 1A/mm2. The constant-frequency valley current mode control offers an extremely small on-time of 11ns. The LTM3360B can support up to 12 phases in a multiphase parallel configuration. The LTM3360B is available in a 160-pin 6.55mm × 5mm × 3.31mm ball grid array (BGA) package with excellent thermal performance. Refer to the LTM3360B data sheet before using or making any hardware changes to the EVAL-LTM3360B-AZ evaluation board.

The EVAL-LTM3360B-AZ input voltage range is from 2.9V to 5.5V, with a default output voltage set at 0.5V. The output voltage is adjustable from 0.3V to 1V using the LTpowerPlay® graphical user interface (GUI) or by using an external voltage divider. The EVAL-LTM3360B-AZ operates in forced continuous mode (FCM) at 2.5MHz switching frequency (fSW).

The LTM3360B can also synchronize to an external clock using the SYNC input. An on-board transient circuit is included to demonstrate the fast transient performance. The LTM3360B data sheet gives a complete description of the device, its operation, and application information.
EVAL-LTM3360B-AZ
LTM3360B: 5VIN, 33A High Density Step-Down DC-to-DC μModule Regulator with I2C and Integrated Capacitors
EVAL-LTM3360B Evaluation Board Angle View EVAL-LTM3360B Evaluation Board Top View EVAL-LTM3360B Evaluation Board Bottom View

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