Ultra-high PSRR LDO regulators suit demanding applications

Ultra-high PSRR LDO regulators suit demanding applications

New Products |
By Rich Pell

The high PSRR of the new NCP16x series LDOs and AEC-Q100-qualified NCV81x automotive variants, says the company, improves performance in demanding imaging and wireless applications, including automotive. The devices are offered as delivering improved performance in applications such as automotive ADAS image sensor modules, portable devices, and wireless applications – including 802.11ad WiGig, Bluetooth, and WLANs.

Comprising four devices with an input voltage range from 1.9 to 5.5 volts (V), the NCP16x series features a PSRR of 98 decibels (dB), which blocks unwanted power supply noise from reaching sensitive analog circuits. A new patented architecture achieves the ultra-high PSRR performance, says the company, providing high PSRR over a wide frequency range of 10 kHz to 100 kHz.

“This new series of ultra-low noise LDOs dramatically improves PSRR, exceeding some conventional LDOs by 30 dB,” says Tim Kaske, Sr. Business Unit Director, ON Semiconductor. “An LDO is still the best solution for low-current applications and with the small size and now even higher levels of performance in PSRR and low noise, they are an ideal power management solution for noise-sensitive RF and image sensor applications.”

Other specifications include ultra-low noise of 6.5 microvolts (uV) RMS, and an output current of 250 milliamperes (mA), 450 mA, and 700 mA in a common package footprint. Dropout voltage is 80 millivolts (mV) and no-load quiescent current is 12 microamperes (µA).

The devices are available in fixed output voltages from 1.2 V to 5.3 V with an accuracy of +/-2% over the entire application range. Stable operation is achieved with only 1 µF of capacitance on the input and output.

The NCP16x devices are available in TSOP-5, XDFN-4, and WLCSP-4 packages. NCV816x automotive variants are available in TSOP-5 and XDFN-4 packages.

ON Semiconductor

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