LTM4670
Info : RECOMMENDED FOR NEW DESIGNS
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LTM4670

Low VIN, Quad μModule Regulator with Configurable 10A Output Array

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Info : RECOMMENDED FOR NEW DESIGNS tooltip
Info : RECOMMENDED FOR NEW DESIGNS tooltip
Part Details
Part Models 2
1ku List Price Starting From $39.03
Features
  • Quad Output Step-Down μModule Regulator with 10A per Output
  • Input Voltage Range: 2.25V to 5.5V
  • Output Voltage Range: 0.5V to VIN
  • 10A DC Output Current Each Channel
  • Ultra Low EMI Noise
  • Parallelable for Up to 40A Output Current
  • Selectable Pulse-Skipping Mode/Forced Continuous Mode
  • Output Voltage Tracking
  • Die Temperature Monitoring Output
  • External Frequency Synchronization
  • Power Good Indicator
  • Overvoltage, Overcurrent and Overtemperature Protection
  • 7.5mm × 15mm × 4.65mm BGA Package
Additional Details
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The LTM4670 is a quad DC/DC step-down μModule® (micromodule) regulator with 10A per output. Outputs can be paralleled in an array for up to 40A capability. Included in the package are the switching controller, power MOSFETs, inductor and all support components. Operating over an input voltage range of 2.25V to 5.5V, each output voltage ranges from 0.5V to VIN set by only one external resistor. Its high efficiency design delivers 10A continuous output current per channel. Only a few input and output capacitors are needed.

The LTM4670 employs a Silent Switcher®2 architecture with internal hot loop bypass capacitors to achieve both low EMI and high efficiency. The default frequency is internally set to 2MHz, it can be externally synchronized to a clock from 1MHz to 2.6MHz.

Fault protection features include overvoltage, overcurrent and overtemperature protection. The LTM4670 is Pb-free and RoHS compliant.

APPLICATIONS

  • Telecom, Networking and Industrial Equipment
  • Multirail Point-of-Load Regulation
  • FPGAs, DSPs and ASICs Applications
Part Models 2
1ku List Price Starting From $39.03

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Documentation

Documentation

Part Model Pin/Package Drawing Documentation CAD Symbols, Footprints, and 3D Models
LTM4670EY#PBF
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LTM4670IY#PBF
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Product Lifecycle

PCN

Apr 15, 2024

- 24_0055

LTM4670 - Die Thickness Change

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Apr 15, 2024

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LTM4670 - Die Thickness Change

Software & Part Ecosystem

Software & Part Ecosystem

Evaluation Kit

Evaluation Kits 1

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DC2891A

LTM4670 | Low VIN, Quad μModule Regulator with Configurable 10A Output Array Step-Down Regulator

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DC2891A

LTM4670 | Low VIN, Quad μModule Regulator with Configurable 10A Output Array Step-Down Regulator

LTM4670 | Low VIN, Quad μModule Regulator with Configurable 10A Output Array Step-Down Regulator

Product Detail

Demonstration circuit 2891A features the LTM4670EY, a high efficiency, quad 10A step-down power μModule® regulator. The input voltage range is from 2.25V to 5.5V. The output voltage range is 0.5V to VIN. Derating is necessary for certain VIN, VOUT, frequency and thermal conditions. The DC2891A offers the SSTT pin allowing the user to program output tracking, soft-start period and die temperature monitoring.

The MODE/SYNC pin either synchronizes the switching frequency to an external clock, is a clock output, or sets the PWM mode. The PWM modes of operation are forced continues mode for low noise or pulse-skipping mode for high efficiency at light load. The LTM4670 defaults to forced continues mode in regulation and during synchronization. The LTM4670 operates in pulse-skipping mode when both the FREQ and MODE/SYNC pins are connected to VIN.

DC2891A has optional jumper resistors to parallel multiple LTM4670 channels. For paralleled channels, one channel can be set as master, and the rest can be set as slaves. The phase shift of a slave channel relative to the master channel can be programmed with a resistor divider on the FREQ pin.

For DC2891A, four channels of LTM4670 are working separately and all set as master. A multiphase oscillator LTC6902 is used to set 90-degree phase shift between adjacent phases and reduce the amount of ripple current in both the input and output capacitors.

The LTM4670 data sheet must be read in conjunction with the demo manual prior to working on or modifying demo circuit DC2891A.

Tools & Simulations

Tools & Simulations 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.

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