Linear Technology has designed a pair of 1.5W DC-DC converters with 2kVac galvanic isolation in a 9mm x 11.25mm x 4.92mm BGA (ball grid array) package.
The LTM8057 and LTM8058 include an isolated transformer, control circuitry, power switches and a modest amount of input and output capacitance.
Both devices will operate from an input voltage range of 3.1V to 31V, delivering a regulated output voltage on the secondary side, adjustable from 2.5V to 12V (LTM8057) and 1.2V to 12V (LTM8058).
The LTM8058 includes a low noise linear post regulator that reduces the output ripple to 20µVRMS at 300mA. Creepage and clearance distances support a working voltage up to 250V in a pollution degree 2 environment* for breaking ground loops in testers, servers, industrial automation, control and servo systems.
The LTM8057 maintains output voltage regulation accuracy of ±5% from -40°C to +125°C. While the LTM8058’s linear post regulator improves output voltage regulation to ±2.5% over the same temperature range.
The converters are available in three temperature grades, E and I from -40°C to +125°C and MP for the -55°C to +125°C operating junction temperature range.
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