Tag Archives: µModule

50A µModule regulator scalable to 250A runs cool with inductors exposed as heatsinks

Analog Devices announces the Power by Linear LTM4678 dual 25A or single 50A step-down µModule regulator with PMBus digital interface. By stacking and exposing its two inductors on top of BGA package, the LTM4678 uses the inductors as heat sinks to transfer heat from inside, keeping the device cool. Onboard EEPROM and PMBus I2C enables a user to measure, alter and record key power parameters such as voltage, load current, temperature and sequencing. Five LTM4678s can current share at 50A each to deliver up to 250A to loads such as processors, FPGAs and ASICSs. Applications include PCIe boards, communication infrastructure, cloud computing, optical as well as medical, industrial and test and measurement devices.

The LTM4678 integrates a DC/DC controller, EEPROM, power FETs, inductors and supporting components in a 16mm x 16mm x 5.86mm BGA package. Output voltage accuracy of ±0.5 per cent is guaranteed over line, load and temperature (–40°C to 125°C).

The LTM4678 operates from 4.5V to 16V input range, and the two output voltages are digitally controlled from 0.5V to 3.3V. The LTM4678 achieves 90 per cent peak efficiency from 12VINand 0.9VOUTat 50A. It delivers 40A at 12VINto 0.9VOUTat 70°C ambient with 200LFM air flow. The switching frequency is 350kHz to 1MHz and can be synchronised to an external clock from 350kHz to 1MHz for noise sensitive applications.

The LTM4678’s high power density and scalability make it ideal for the PCB area constraints of densely populated system boards to power the low-voltage & high-current advanced digital devices.

www.analog.com/LTM4678

Analog Devices’ tiny µModule boost regulator for low voltage optical systems

Analog Devices, Inc. has announced the Power by Linear LTM4661, a low power step-up µModule regulator in a 6.25mm x 6.25mm x 2.42mm BGA package. Only a few capacitors and one resistor are required to complete the design, and the solution occupies less than 1cm²single-sided or 0.5cm²on double-sided PCBs. The LTM4661 incorporates a switching DC/DC controller, MOSFETs, inductors and supporting components. The LTM4661 operates from a 1.8V to 5.5V input supply, and continues to operate down to 0.7V after start-up. The output voltage can be set by a single resistor ranging from 2.5V to 15V. The combination of the small, thin package and wide input and output voltage range is ideal for a wide range of applications including optical modules, battery-powered equipment, battery-based backup systems, bias voltage for power amps or laser diodes and small DC motors.

The LTM4661 can deliver 4A continuously under 3.3VINto 5VOUT, and 0.7A continuously under 3.3VINto 12VOUT. The LTM4661 employs synchronous rectification, which delivers as high as 92 per cent conversion efficiency (3.3VIN to 5VOUT). The switching frequency is 1MHz, and can also be synchronised to an external clock ranging from 500kHz to 1.5MHz. The LTM4661 1MHz switching frequency and dual phase single output architecture enable fast transient response to line and load changes and a significant reduction of output ripple voltage. The LTM4661 has three operation modes: Burst Mode operation, forced continuous mode and external sync mode. The quiescent current in Burst Mode operation is only 25µA, which provides extended battery run time. For applications demanding the lowest possible noise operation, the forced continuous mode or external sync mode minimise possible interference of switching noise.

The LTM4661 features an output disconnect during shutdown and inrush current limit at start-up. Fault protection features include short-circuit, overvoltage and over temperature protection. The LTM4661 operates from –40℃to 125℃operating temperature.

Dual 15A or Single 30A µModule Regulator with Stacked Inductor Package is 96% Peak Efficient

Analog Devices  announces the Power by Linear LTM4662, a dual 15A or single 30A step-down µModule regulator in a BGA package with an exposed stacked inductor for improved thermal dissipation properties. The remaining components, the MOSFETs, DC/DC controller and supporting components, are over-moulded and the complete device is housed in a 11.25mm x 15mm x 5.74mm BGA package. With limited airflow, the LTM4662 is easily cooled because the inductor transfers heat from the power stage to the surrounding ambient air. The LTM4662 performs at up to 96% peak efficiency, enabling it to deliver a full 30A continuously at 12VIN to 1.0VOUT at 70°C ambient with 200LFM airflow. With the dual regulator design, small package size and precise voltage accuracy, the LTM4662 meets the PCB area constraints of densely populated system boards to power low voltage and high current devices such as FPGAs, ASICs, microprocessors and GPUs. Applications include PCIe boards, communication infrastructure, cloud computing-based systems, as well as medical, industrial, and test & measurement equipment.

The LTM4662 operates from a 4.5V to 20V input voltage range. With 5V external bias, the device can operate from 2.375V. The output voltages are adjustable from 0.6V to 5.5V, enabling the device to generate not only low voltage for digital devices but also 2.5V, 3.3V and 5V which are commonly needed as system bus voltages. Total output voltage DC accuracy is guaranteed at ±1.5% over line, load and temperature (–40°C to 125°C). Two LTM4662s can current share to deliver 60A to a load. Moreover, the onboard remote sense amplifiers on both outputs compensate for voltage drops caused by trace impedance of the PC board due to large load current. The LTM4662 has selectable internal or external feedback loop compensation, enabling users to optimize loop stability and transient performance while minimizing the number of output capacitors.

The LTM4662’s switching frequency can be programmed from 250kHz to 1MHz with one resistor, and can be synchronised to an external clock ranging from 250kHz to 1MHz for noise-sensitive applications. Protection features include overvoltage and overcurrent protection.

The LTM4662 operates from –40°C to 125°C. For more information, visit www.linear.com/product/LTM4662

LTM4643 – Ultrathin Quad μModule Regulator with Configurable 3A Output Array

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Configurable as quad, triple, dual or single output, the LTM4643 quad output step-down µModule [micromodule] (power module) regulator deliver, respectively, 12A, 6A & 6A or 9A & 3A, or 4 x 3A from a 9 x 15 x 1.82 mm ultrathin LGA package. by Graham Prophet @ edn.com:

This flexibility enables system designers to rely on one simple and compact µModule regulator for a variety of voltage and load current requirements in FPGA, GPU, ASIC and processor-based applications. The 1.82 mm height ultrathin package allows the LTM4643 to be mounted on the backside of the PCB, freeing space on the topside. The LTM4643 is suitable for systems with height restrictions, such as backside PCB assembly in PCIe applications and where the regulator must fit under a common heat sink or cold plate to cool high power FPGAs, GPUs, ASICs and processors in applications such as embedded computing, data storage, medical imaging and industrial systems

LTM4643 – Ultrathin Quad μModule Regulator with Configurable 3A Output Array – [Link]

LTM8003 – 40VIN, 3.5A Step-Down μModule Regulator

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LTM8003 is a step-down DC/DC µModule (micro-module) regulator with a 40V input voltage rating (42V abs. Max.) and 3.5A of continuous (6A peak) output current. The LTM8003’s pinout is FMEA (failure mode effects analysis) compliant, so the output voltage stays at or below the regulation voltage in the event of short-circuit to GND, short-circuit to a neighbouring pin or if a pin is left floating.

The maximum junction temperature of the H-grade version is 150°C, for high temperature or high power automotive and industrial applications. The LTM8003 operates from an input voltage range of 3.4V to 40V and has an adjustable output voltage range of 0.97V to 18V. The switching frequency is adjustable via an external resistor or can be synchronized to an external clock from 200 kHz to 3 MHz. The LTM8003 has four operation modes: Burst Mode operation, pulse skip mode, pulse skip mode with spread spectrum and external synch mode. The quiescent current in Burst Mode operation is 25 µA (max), suiting the LTM8003 for battery operated systems, specifically “keep alive” systems.

LTM8003 – 40VIN, 3.5A Step-Down μModule Regulator – [Link]

LTM8053 – 40VIN, 3.5A/6A Step-Down μModule Regulator

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The LTM8053 is a 40VIN, 3.5A (continuous) step-down μModule regulator. Included in the package are the switching controller, power switches, inductor, and all support components. Operating over an input voltage range of 3.4V to 40V, the LTM8053 supports an output voltage range of 0.97V to 15V and a switching frequency range of 200kHz to 3MHz, each set by a single resistor. Only the input and output filter capacitors are needed to finish the design

LTM8053 – 40VIN, 3.5A/6A Step-Down μModule Regulator – [Link]

 

LTM8064 – 58VIN, 6A CVCC Step-Down μModule Regulator

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LTM8064 is a step-down DC/DC µModule (micro-module/power module) regulator with a 6V to 58V (60Vmax) input voltage range and adjustable load current control with ±10% accuracy at 7A.

Linear Technology introduces the LTM8064, a step-down DC/DC µModule® (power module) regulator with a 6V to 58V (60Vmax) input voltage range and adjustable load current control with ±10% accuracy at 7A. The LTM8064 can be used as a point-of-load step-down regulator operating from 24V, 36V and 48V voltage rails used in communication infrastructure, high end computers, test equipment, automotive, avionics and a wide variety of industrial equipment. In addition, the LTM8064 operates as a constant current source to precisely regulate and control (adjust) the load current up to 7A when sourcing and 9.1A when sinking. Applications requiring precision load current control include Peltier devices for cooling and heating, battery and supercapacitor chargers, LED and laser drivers, and motor and fan controllers.

LTM8064 – 58VIN, 6A CVCC Step-Down μModule Regulator – [Link]