POWER
How a 16V, 8A Silent Switcher µModule Regulator is ideal for low noise applications
Charlie Zhao, principal engineer, Analog Devices says that low noise performance is a crucial aspect of many power applications
A
nalog Devices’ pioneering Silent Switcher technology has enabled the development of Module regulators with innovative circuit design and packaging techniques, offering high efficiency while reducing electromagnetic interference. The unique approach makes these regulators less susceptible to PCB layout variations, resulting in simplified designs and enhanced performance. ADI’s step-down DC-to-DC µModule regulator, capable of delivering 8A maximum output current from a 3V to 16V input, is an ideal compact solution for high current and noise-sensitive applications. Low noise is an increasingly common requirement for many power supply applications, such as high precision data converters, medical devices, and RF systems. Traditionally, switch-mode DC-to-DC converters were known for their inherent noise, making them unsuitable for noise-sensitive applications. ADI’s pioneering Silent Switcher technology has enabled the development of µModule regulators that offer exceptional performance for low noise applications. The LTM4702 is a step-down DC-to-DC µModule regulator capable of delivering 8A maximum output current from a 3V to 16V input. It employs Silent Switcher architecture with internal hot loop bypass capacitors to achieve both low electromagnetic interference (EMI) and high efficiency. The module contains a current-mode controller, power switching elements, a power inductor, and a modest amount of input and output capacitance.
The output voltage can be regulated from 0.3V to 5.7V. This IC is available in a tiny 6.25mm ? 6.25mm ? 5.07mm BGA package with a –40°C to +125°C operating junction temperature range.
Typical Application Example Figure 1 shows a typical application schematic. It operates at about 800kHz switching frequency. The switching frequency can be easily adjusted by a resistor (RT pin resistor to
12 MAY 2025 | ELECTRONICS FOR ENGINEERS
Fig 1: The LTM4702 1V, 8A step-down Silent Switcher µModule regulator
Fig 2: Efficiency vs. load current (VIN = 12V)
Page 1 |
Page 2 |
Page 3 |
Page 4 |
Page 5 |
Page 6 |
Page 7 |
Page 8 |
Page 9 |
Page 10 |
Page 11 |
Page 12 |
Page 13 |
Page 14 |
Page 15 |
Page 16 |
Page 17 |
Page 18 |
Page 19 |
Page 20 |
Page 21 |
Page 22 |
Page 23 |
Page 24 |
Page 25 |
Page 26 |
Page 27 |
Page 28 |
Page 29 |
Page 30 |
Page 31 |
Page 32 |
Page 33 |
Page 34 |
Page 35 |
Page 36 |
Page 37 |
Page 38 |
Page 39 |
Page 40 |
Page 41 |
Page 42
