New Content (1)
Features and Benefits
- 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
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.
- Telecom, Networking and Industrial Equipment
- Multirail Point-of-Load Regulation
- FPGAs, DSPs and ASICs Applications
Product Lifecycle Recommended for New Designs
This product has been released to the market. The data sheet contains all final specifications and operating conditions. For new designs, ADI recommends utilization of these products.
Evaluation Kits (1)
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
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.
Models for the following parts are available in LTspice:
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.
Sample & Buy
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 Analog Devices, Inc. sales office or authorized distributor. Pricing displayed for Evaluation Boards and Kits is based on 1-piece pricing.