LTM4660

60V, 300W Hybrid Step-Down μModule Bus Converter

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New Content (1)

User Guides

DC2959A-B - Demo Manual

Overview

Features and Benefits
Product Details

Features and Benefits

Input Voltage Range: 30V to 60V (65V Abs. Max.)
Wide Output Voltage: 4.5V to 18V (V_OUT < V_IN/2)
97.3% Peak Efficiency (12V_OUT at 15A, 48V_IN)
±1.5% Maximum Total DC Output Error
Up to 300W Output Power
Scalable: Parallel LTM4660s for Higher Power
Fixed Frequency Current Mode Control
Phase-Lockable External Synchronization from 200kHz to 1MHz
Low Start-Up Inrush Current with Flying Capacitor Voltage-Balancing Prior to DC/DC Switching Action

Output Voltage Tracking with Soft-Start
Short-Circuit Protection with Adjustable Retry-Timer
Overcurrent and Overtemperature Protection
Onboard Diode Temperature Monitor
Optional External Reference Input
Power Good and FAULT Indicators
16mm × 16mm × 10.34mm BGA Package

Product Details

The LTM4660 is a complete 300W output switching mode hybrid-topology step-down DC/DC μModule^® (micromodule) nonisolated bus converter. Its exposed power inductor resides on the top of the package, providing an intrinsic path for heat to dissipate up and out of the module—away from one’s printed circuit board. Included in the package are the switching controller IC, power MOSFETs and supporting components. Only flying (charge-pump) capacitors, bulk input and output bypass capacitors, and a few configuration passives are needed.

The LTM4660 features frequency synchronization, Burst Mode^® operation and output voltage soft-start and tracking. An onboard temperature diode is available for temperature monitoring. The LTM4660 protects against short-circuit, overcurrent, and overtemperature faults. For higher power applications, multiple LTM4660 modules can be easily paralleled.

The LTM4660 is offered in a 16mm × 16mm × 10.34mm BGA package with RoHS compliant terminal finish.

APPLICATIONS

Telecom, Data Centers and Networking Equipment
Industrial and Test Equipment

Product Categories

Power Management
- µModule Buck Regulators
- High Input Voltage Buck Regulators

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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 (2)

DC2959A-B

LTM4660 | High Efficiency, PolyPhase 75A Hybrid Step-Down Power μModule Regulator 3× LTM4660, 75A

DC2879A

LTM4660 | High Density Hybrid Step-Down Synchronous Converter

DC2959A-B

View Detailed Evaluation Kit Information

Demonstration circuit 2959A-B is a high efficiency, high power density hybrid step-down converter. It can deliver 12V/75A with an input voltage from 36V to 60V (up to 65V during transients). This demo board features PolyPhase^®design using the LTM4660, which uses an architecture that merges soft-switching switched capacitor topology with a traditional step-down converter to provide superior efficiency compared to the traditional switching architectures. It offers a high efficiency/high density and cost-effective solution for nonisolated intermediate bus applications in power distribution, datacom, and telecom.

The LTM4660 on DC2959A-B always operates in continuous conduction mode. The switching frequency can be programmed through a resistor or can be synchronized to an external clock signal. Due to its current mode control architecture, excellent current sharing and low output voltage ripple are achievable in the multiphase configuration. Other benefits include low EMI emissions due to a soft-switched front end and reduced MOSFET stress.

The LTM4660 monitors system voltage, current, and temperature for faults. It stops switching and pulls the FAULT pin low when a fault condition occurs. An onboard timer can be set for appropriate restart/retry times. Additional features include ±1.5% output voltage accuracy over temperature, a power good output signal, short-circuit protection, monotonic output voltage start-up, optional external reference, undervoltage lockout, and internal charge balance circuitry.

The LTM4660 data sheet must be used in conjunction with the demo board manual.

Resources

DC2959A-B - Demo Manual (Rev. 0)

PDF

887.29 K

DC2879A

View Detailed Evaluation Kit Information

Demonstration circuit 2879A is a high efficiency, high power density hybrid converter. It can deliver 12V/25A with an input voltage from 36V to 60V (up to 65V during transients). This demo board features the LTM4660, which uses an architecture that merges soft-switching switched capacitor topology with a traditional step-down converter to provide superior efficiency compared to the traditional switching architectures. It offers a high efficiency/high density and cost effective solution for nonisolated intermediate bus applications in power distribution, datacom and telecom.

Due to its current mode control architecture, multiple LTM4660s can be operated in a parallel, multiphase configuration with excellent current sharing and low output voltage ripple to enable much higher power applications. Other benefits include low EMI emissions due to a soft-switched front end and reduced MOSFET stress.

The LTM4660 design eliminates the inrush current typically associated with switched capacitor circuits by pre-balancing the capacitors on start-up. The LTM4660 also monitors system voltage, current and temperature for faults. It stops switching and pulls the FAULT pin low when a fault condition occurs. An onboard timer can be set for appropriate restart/retry times.

Additional features include ±1.5% output voltage accuracy over temperature, a clock output for multiphase operation, a power good output signal, short-circuit protection, monotonic output voltage start-up, optional external reference, undervoltage lockout and internal charge balance circuitry.

The LTM4660 data sheet must be used in conjunction with this demo board manual.

Resources

Documentation & Resources

Data Sheets

LTM4660: 60V, 300W Hybrid Step-Down μModule Bus Converter Data Sheet (Rev. 0)
4/13/2022

PDF

2 M

User Guides

DC2959A-B - Demo Manual (Rev. 0)
5/26/2023

PDF

887 K
DC2879A - Demo Manual (Rev. 0)
4/13/2022

PDF

750 K

Tools & Simulations

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LTM4660

Design Resources

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 Number	Material Declaration	Reliability Data	Pin/Package Drawing	CAD Symbols, Footprints & 3D Models
LTM4660EY#PBF	Material Declaration	Reliability Data	120-Lead BGA (16mm x 16mm x 10.34mm)	Ultra Librarian SamacSys
LTM4660IY#PBF	Material Declaration	Reliability Data	120-Lead BGA (16mm x 16mm x 10.34mm)	Ultra Librarian SamacSys
Wafer Fabrication Data

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Pricing displayed is based on 1-piece. The USA list pricing shown is for budgetary use only, shown in United States dollars (FOB USA per unit), and is subject to change. International prices may vary due to local duties, taxes, fees and exchange rates.