Micro dc/dc converter devices save space and reduce noise
1 min read
Murata has announced production of its new micro dc/dc converter device series, which it claims will reduce the board space used by buck converters in battery powered devices.
All of the devices in the LXDC2HL series measure 2.5 x 2.0 x 1.1mm and, according to the company, occupy less than 10mm2 of board space. The buck converter devices are designed to be used with 2.3 to 5.5V from a source such as a Li-ion battery and incorporate a newly developed ferrite multilayer substrate which incorporates the power inductor to enable low levels of noise.
According to Murata, the length of the connection between the controller IC and the inductor is close to zero to further reduce noise emissions.
Seven models have been launched with output voltages of 1.2, 1.35, 1.5, 1.8 (600mA), 2.5 (500mA), 3.0 (400mA) and 3.3V (300mA). Typical efficiency for these parts is 88%.
All models have an input voltage range of 2.3 to 5.5V and an operating temperature range of -40 to 85ºC. The series has a synchronous rectifier topology and a PFM/PWM auto select function to contribute to overall efficiency. Switching frequency is rated at 3MHz.
