LTM4681

• Designed to be used for 48V Power Systems as the 48V offers a higher power density.
• Integrated solution for hot-swap applications allowing a board to be safely inserted and removed from a live backplane.
• Ease in design as it uses micro modules that will utilize few external components
• High power and low voltage capability for FPGAs, microcontrollers, etc.

The AD-PS0005-RD reference design provides a comprehensive power solution for 48V systems, featuring multiple outputs and a hot-swappable capability for enhanced reliability and flexibility.

This system board integrates the following key components: LTC4286, a high-power positive hot-swap controller; LTM4660, a 60V/300W hybrid step-down µModule® bus converter that delivers the 12V output; LTM4681, a quad 31.25A µModule regulator with an advanced digital power management system; and LTM4655, a 40V dual 4A step-down or 50W inverting µModule regulator for versatile power conversion.

APPLICATIONS

• 48V Bench Test Equipment
• 48V System Data Center
• Microcontrollers and FPGAs

• Designed to be used for 48V Power Systems as the 48V offers a higher power density.
• Integrated solution for hot-swap applications allowing a board to be safely inserted and removed from a live backplane.
• Ease in design as it uses micro modules that will utilize few external components
• High power and low voltage capability for FPGAs, microcontrollers, etc.

The AD-PS0005-RD reference design provides a comprehensive power solution for 48V systems, featuring multiple outputs and a hot-swappable capability for enhanced reliability and flexibility.

This system board integrates the following key components: LTC4286, a high-power positive hot-swap controller; LTM4660, a 60V/300W hybrid step-down µModule® bus converter that delivers the 12V output; LTM4681, a quad 31.25A µModule regulator with an advanced digital power management system; and LTM4655, a 40V dual 4A step-down or 50W inverting µModule regulator for versatile power conversion.

APPLICATIONS

• 48V Bench Test Equipment
• 48V System Data Center
• Microcontrollers and FPGAs

Demonstration circuit DC3082A-C features the LTM4681: the wide input and output voltage range, high efficiency and power density, high current PolyPhase^® single output DC/DC step-down μModule^® regulator with digital power system management. DC3082A-C is configured as 16-phase single output using 4× LTM4681. The factory default input voltage is 12V typical, output voltage is 1V at 480A typical or 500A peak with recommended 400LFM forced airflow. The demo board output voltages can be adjusted from 0.6V to 1V. Programming the output voltages to any value that is greater than 1V, requires derating output current based on thermal derating curves provided in the data sheet of the LTM4681. Heat sink or other appropriate electronic cooling systems can also be used in conjunction with forced airflow to further optimize the output power when the output is on and loaded with maximum output current. The factory default switching frequency is preset at 350kHz typical. DC3082A-C comes with PMBus interface and digital power system management functions. An onboard 12-pin connector is available for users to connect the dongle DC1613A to the demo board, provides an easy way to communicate and program the part using LTpowerPlay^® software development tool. LTpowerPlay software and I2C/PMBus/SMBus dongle DC1613A allows users to monitor real time telemetry of input and output voltages, input and output current, switching frequency, internal IC die temperatures, power stage component temperatures and fault logs. Programmable parameters include device address, output voltages, control loop compensation, switching frequency, phase interleaving, DCM or CCM mode of operation, digital soft-start, sequencing and time based shutdown, fault responses to input and output overvoltage, output overcurrent, IC die and power component overtemperature.

The LTM4681 is available in a thermally enhanced, low profile 330-Lead (15mm × 22mm × 8.17mm) BGA package. It is recommended to read the data sheet and the demo manual of LTM4681 prior to use or making any hardware changes to DC3082A-C.

LTpowerPlay software can be downloaded here.

USB to PMBus Controller Dongle DC1613A for use with LTpowerPlay is available here.

Demonstration circuit DC3082A-C features the LTM4681: the wide input and output voltage range, high efficiency and power density, high current PolyPhase^® single output DC/DC step-down μModule^® regulator with digital power system management. DC3082A-C is configured as 16-phase single output using 4× LTM4681. The factory default input voltage is 12V typical, output voltage is 1V at 480A typical or 500A peak with recommended 400LFM forced airflow. The demo board output voltages can be adjusted from 0.6V to 1V. Programming the output voltages to any value that is greater than 1V, requires derating output current based on thermal derating curves provided in the data sheet of the LTM4681. Heat sink or other appropriate electronic cooling systems can also be used in conjunction with forced airflow to further optimize the output power when the output is on and loaded with maximum output current. The factory default switching frequency is preset at 350kHz typical. DC3082A-C comes with PMBus interface and digital power system management functions. An onboard 12-pin connector is available for users to connect the dongle DC1613A to the demo board, provides an easy way to communicate and program the part using LTpowerPlay^® software development tool. LTpowerPlay software and I2C/PMBus/SMBus dongle DC1613A allows users to monitor real time telemetry of input and output voltages, input and output current, switching frequency, internal IC die temperatures, power stage component temperatures and fault logs. Programmable parameters include device address, output voltages, control loop compensation, switching frequency, phase interleaving, DCM or CCM mode of operation, digital soft-start, sequencing and time based shutdown, fault responses to input and output overvoltage, output overcurrent, IC die and power component overtemperature.

The LTM4681 is available in a thermally enhanced, low profile 330-Lead (15mm × 22mm × 8.17mm) BGA package. It is recommended to read the data sheet and the demo manual of LTM4681 prior to use or making any hardware changes to DC3082A-C.

LTpowerPlay software can be downloaded here.

USB to PMBus Controller Dongle DC1613A for use with LTpowerPlay is available here.

Demonstration circuit 3082A-B features the LTM4681: the wide input and output voltage range, high efficiency and power density, high current PolyPhase^® single out-put DC/DC step-down μModule^® regulator with digital power system management. DC3082A-B is configured as 12-phase single output using 3 × LTM4681. The factory default input voltage is 12V typical, output voltage is 1V at 360A typical or 375A peak with recommended 400LFM forced airflow. The demo board output voltages can be adjusted from 0.6V to 1V. Programming the output voltages to any value that is greater than 1V, requires derating output current based on thermal derating curves provided in the data sheet of the LTM4681. Heat sink or other appro-priate electronic cooling systems can also be used in conjunction with forced airflow to further optimize the output power when the output is on and loaded with maximum output current. The factory default switching frequency is preset at 350kHz typical. DC3082A-B comes with PMBus interface and digital power system management functions. An onboard 12-pin connector is available for users to connect the dongle DC1613A to the demo board, provides an easy way to communicate and program the part using LTpowerPlay^® software development tool. LTpowerPlay software and I²C/PMBus/SMBus dongle DC1613A allows users to monitor real time telemetry of input and output voltages, input and output current, switching frequency, internal IC die temperatures, power stage component temperatures and fault logs. Programmable parameters include device address, output voltages, control loop compensation, switching frequency, phase interleaving, DCM or CCM mode of operation, digital soft-start, sequencing, and time based shutdown, fault responses to input and output overvoltage, output overcurrent, IC die and power component overtemperatures.

The LTM4681 is available in a thermally enhanced, low profile 330-lead (15mm × 22mm × 8.17mm) BGA package. It is recommended to read the data sheet and demo manual of LTM4681 prior to use or making any hardware changes to DC3082A-B.

LTpowerPlay software can be downloaded here.

USB to PMBus Controller Dongle DC1613A for use with LTpowerPlay is available here.

Demonstration circuit 3082A-B features the LTM4681: the wide input and output voltage range, high efficiency and power density, high current PolyPhase^® single out-put DC/DC step-down μModule^® regulator with digital power system management. DC3082A-B is configured as 12-phase single output using 3 × LTM4681. The factory default input voltage is 12V typical, output voltage is 1V at 360A typical or 375A peak with recommended 400LFM forced airflow. The demo board output voltages can be adjusted from 0.6V to 1V. Programming the output voltages to any value that is greater than 1V, requires derating output current based on thermal derating curves provided in the data sheet of the LTM4681. Heat sink or other appro-priate electronic cooling systems can also be used in conjunction with forced airflow to further optimize the output power when the output is on and loaded with maximum output current. The factory default switching frequency is preset at 350kHz typical. DC3082A-B comes with PMBus interface and digital power system management functions. An onboard 12-pin connector is available for users to connect the dongle DC1613A to the demo board, provides an easy way to communicate and program the part using LTpowerPlay^® software development tool. LTpowerPlay software and I²C/PMBus/SMBus dongle DC1613A allows users to monitor real time telemetry of input and output voltages, input and output current, switching frequency, internal IC die temperatures, power stage component temperatures and fault logs. Programmable parameters include device address, output voltages, control loop compensation, switching frequency, phase interleaving, DCM or CCM mode of operation, digital soft-start, sequencing, and time based shutdown, fault responses to input and output overvoltage, output overcurrent, IC die and power component overtemperatures.

The LTM4681 is available in a thermally enhanced, low profile 330-lead (15mm × 22mm × 8.17mm) BGA package. It is recommended to read the data sheet and demo manual of LTM4681 prior to use or making any hardware changes to DC3082A-B.

LTpowerPlay software can be downloaded here.

USB to PMBus Controller Dongle DC1613A for use with LTpowerPlay is available here.

Demonstration circuit 2924A-A/2924A-B features the LTM4681: the wide input and output voltage range, high efficiency and power density, quad output PolyPhase^® DC/DC step-down μModule^® regulator with digital power system management. Demo board DC2924A is available in two versions: DC2924A-A is configured as 4-phase 4 outputs, DC2924A-B is configured as 4-phase single output. The demo board default input voltage range is 4.5V to 16V. However, if V_IN is lower than 6V and within 4.5V ≤ V_IN ≤ 5.75V range, minor modification to certain existing onboard components is required. Please refer to the Operation at Low V_IN: 4.5V ≤ V_IN ≤ 5.75V paragraph in the demo manual for more details. The factory default output voltage (V_OUT0, V_OUT1, V_OUT2 and V_OUT3) is 1V at 30A maximum load current per channel (DC2924A-A). The factory default output voltage V_OUT = 1V at 120A maximum load current (DC2924A-B). Each channel can deliver up to 30A maximum load current but forced airflow and heat sink might also be used to further optimize the output power when all output rails are on and fully loaded. The demo board output voltages can be adjusted from 0.6V up to 1.8V. Programming the output voltages to any value that is greater than 1.8V, requires derating output current based on thermal derating curves provided in the LTM4681 data sheet. The factory default switching frequency is preset at 350kHz typical. Both versions of DC2924A come with PMBus interface and digital power system management functions. An onboard 12-pin connector is available for users to connect the dongle DC1613A to the demo board, provides an easy way to communicate and program the part using LTpowerPlay^® software development tool. LTpowerPlay software and I²C/PMBus/SMBus dongle DC1613A allows users to monitor real time telemetry of input and output voltages, input and output current, switching frequency, internal IC die temperatures, external power component temperatures and fault logs. Programmable parameters include device address, output voltages, control loop compensation, switching frequency, phase interleaving, DCM or CCM mode of operation, digital soft-start, sequencing and time based shutdown, fault responses to input and output overvoltage, output overcurrent, IC die and power component overtemperatures.

The LTM4681 is available in a thermally enhanced, low profile 330-Lead (15mm × 22mm × 8.17mm) BGA package. It is recommended to read the LTM4681 data sheet and the 2924A-A/2924A-B demo manual prior to use or making any hardware changes to DC2924A-A/DC2924A-B.

Demonstration circuit 2924A-A/2924A-B features the LTM4681: the wide input and output voltage range, high efficiency and power density, quad output PolyPhase^® DC/DC step-down μModule^® regulator with digital power system management. Demo board DC2924A is available in two versions: DC2924A-A is configured as 4-phase 4 outputs, DC2924A-B is configured as 4-phase single output. The demo board default input voltage range is 4.5V to 16V. However, if V_IN is lower than 6V and within 4.5V ≤ V_IN ≤ 5.75V range, minor modification to certain existing onboard components is required. Please refer to the Operation at Low V_IN: 4.5V ≤ V_IN ≤ 5.75V paragraph in the demo manual for more details. The factory default output voltage (V_OUT0, V_OUT1, V_OUT2 and V_OUT3) is 1V at 30A maximum load current per channel (DC2924A-A). The factory default output voltage V_OUT = 1V at 120A maximum load current (DC2924A-B). Each channel can deliver up to 30A maximum load current but forced airflow and heat sink might also be used to further optimize the output power when all output rails are on and fully loaded. The demo board output voltages can be adjusted from 0.6V up to 1.8V. Programming the output voltages to any value that is greater than 1.8V, requires derating output current based on thermal derating curves provided in the LTM4681 data sheet. The factory default switching frequency is preset at 350kHz typical. Both versions of DC2924A come with PMBus interface and digital power system management functions. An onboard 12-pin connector is available for users to connect the dongle DC1613A to the demo board, provides an easy way to communicate and program the part using LTpowerPlay^® software development tool. LTpowerPlay software and I²C/PMBus/SMBus dongle DC1613A allows users to monitor real time telemetry of input and output voltages, input and output current, switching frequency, internal IC die temperatures, external power component temperatures and fault logs. Programmable parameters include device address, output voltages, control loop compensation, switching frequency, phase interleaving, DCM or CCM mode of operation, digital soft-start, sequencing and time based shutdown, fault responses to input and output overvoltage, output overcurrent, IC die and power component overtemperatures.

The LTM4681 is available in a thermally enhanced, low profile 330-Lead (15mm × 22mm × 8.17mm) BGA package. It is recommended to read the LTM4681 data sheet and the 2924A-A/2924A-B demo manual prior to use or making any hardware changes to DC2924A-A/DC2924A-B.

Demonstration circuit 3082A-A features the LTM4681: the wide input and output voltage range, high efficiency and power density, high current PolyPhase^® single output DC/DC step-down μModule^® regulator with digital power system management. DC3082A-A is configured as 8-phase single output using 2 × LTM4681. The factory default input voltage is 12V typical, output voltage is 1V at 240A typical or 250A peak with recommended 400LFM forced airflow. The demo board output voltages can be adjusted from 0.6V to 1V. Programming the output voltages to any value that is greater than 1V, requires derating output current based on thermal derating curves provided in the data sheet of the LTM4681. Heat sink or other appropriate electronic cooling systems can also be used in conjunction with forced airflow to further optimize the output power when the output is on and loaded with maximum output current. The factory default switching frequency is preset at 350kHz typical. DC3082A-A comes with PMBus interface and digital power system management functions. An onboard 12-pin connector is available for users to connect the dongle DC1613A to the demo board, provides an easy way to communicate and program the part using LTpowerPlay^® software development tool. LTpowerPlay software and I²C/PMBus/SMBus dongle DC1613A allows users to monitor real time telemetry of input and output voltages, input and output current, switching frequency, internal IC die temperatures, power stage component temperatures and fault logs. Programmable parameters include device address, output voltages, control loop compensation, switching frequency, phase interleaving, DCM or CCM Mode of operation, digital soft-start, sequencing, and time based shutdown, fault responses to input and output overvoltage, output overcurrent, IC die and power component overtemperatures.

The LTM4681 is available in a thermally enhanced, low profile 330-Lead (15mm × 22mm × 8.17mm) BGA package. It is recommended to read the data sheet and demo manual of LTM4681 prior to using or making any hardware changes to DC3082A-A.

LTpowerPlay software can be downloaded here.

USB to PMBus Controller Dongle DC1613A for use with LTpowerPlay is available here.

Demonstration circuit 3082A-A features the LTM4681: the wide input and output voltage range, high efficiency and power density, high current PolyPhase^® single output DC/DC step-down μModule^® regulator with digital power system management. DC3082A-A is configured as 8-phase single output using 2 × LTM4681. The factory default input voltage is 12V typical, output voltage is 1V at 240A typical or 250A peak with recommended 400LFM forced airflow. The demo board output voltages can be adjusted from 0.6V to 1V. Programming the output voltages to any value that is greater than 1V, requires derating output current based on thermal derating curves provided in the data sheet of the LTM4681. Heat sink or other appropriate electronic cooling systems can also be used in conjunction with forced airflow to further optimize the output power when the output is on and loaded with maximum output current. The factory default switching frequency is preset at 350kHz typical. DC3082A-A comes with PMBus interface and digital power system management functions. An onboard 12-pin connector is available for users to connect the dongle DC1613A to the demo board, provides an easy way to communicate and program the part using LTpowerPlay^® software development tool. LTpowerPlay software and I²C/PMBus/SMBus dongle DC1613A allows users to monitor real time telemetry of input and output voltages, input and output current, switching frequency, internal IC die temperatures, power stage component temperatures and fault logs. Programmable parameters include device address, output voltages, control loop compensation, switching frequency, phase interleaving, DCM or CCM Mode of operation, digital soft-start, sequencing, and time based shutdown, fault responses to input and output overvoltage, output overcurrent, IC die and power component overtemperatures.

The LTM4681 is available in a thermally enhanced, low profile 330-Lead (15mm × 22mm × 8.17mm) BGA package. It is recommended to read the data sheet and demo manual of LTM4681 prior to using or making any hardware changes to DC3082A-A.

LTpowerPlay software can be downloaded here.

USB to PMBus Controller Dongle DC1613A for use with LTpowerPlay is available here.

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