Hittite has introduced the HMC976LP3E, a BiCMOS linear voltage regulator for high-current, low-noise applications such as point-to-point microwave radio where high data throughput demands very low power supply noise. The device is also suitable for high-precision, high-quality test instrumentation, cellular base station infrastructure and radar or military applications.
Incorporating the HMC976LP3E regulator into VCO and PLL designs can improve phase noise performance and make possible the relatively high SNR needed for signals with a dense constellation. The IC delivers up to 400 mA of current, a PSRR (power supply rejection ratio) of less than -60 dB at 1 kHz offset, and provides rejection of any preceding switching regulator, power supply noise or any other externally generated noise.
The HMC976LP3E provides an output voltage in the 1,8 to 5 V range at 400 mA and offers low output noise spectral densities of 6 nVHz at 1 kHz offset, and 3 nVHz at 10 kHz offset. It is housed in 3 x 3 mm plastic leadless surface mount package and provides temperature stability over the -40°C to +85°C temperature range.
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