Analog Devices announces the Power by Linear™ LTM4662, a dual 15 A or single 30 A 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 overmolded and the complete device is housed in a 11.25 mm x 15 mm x 5.74 mm 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 30 A continuously at 12 VIN to 1.0 VOUT 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 4.5 V to 20 V input voltage range. With 5 V external bias, the device can operate from 2.375 V. The output voltages are adjustable from 0.6 V to 5.5 V, enabling the device to generate not only low voltage for digital devices but also 2.5 V, 3.3 V and 5 V 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 60 A 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 250 kHz to 1 MHz with one resistor, and can be synchronized to an external clock ranging from 250 kHz to 1 MHz 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.
Summary of Features: LTM4662
- Dual 15 A or Single 30 A Output
- Wide Input Voltage Range: 4.5 V to 20 V
- 2.375 VMIN with CPWR Bias
- Output Voltage Range: 0.6 V to 5.5 V
- ±1.5% Maximum Total DC Output Error
- Up to 96% Efficiency
- Multiphase Current Sharing
- Differential Remote Sense Amplifier, Each Channel
- Internal or External Compensation
- BGA Ball Finishes Available: SAC305 (RoHS) & SnPb (63/37)
Pricing & Availability
||Price Each Per 1,000
||Starts at $18.85
||11.25 mm x 15 mm x 5.74 mm BGA Package