ADP176x and ADP715x LDO regulators can provide faster transient response and higher PSRR.

Analog Devices (www.analog.com) announced two low dropout (LDO) regulator products.

The newly released LDO regulator provides ultra-low noise performance capable of eliminating unwanted system noise and improving receiver, transmitter, and acoustic quality.

Target applications for the ADP176x and ADP715x LDO regulator families include wireless base stations, wired communications, industrial instrumentation, high-end audio equipment, and medical devices. Using the new LDO regulators can provide cleaner power rails, faster transient response, and a higher power supply rejection ratio (PSRR) for noise-sensitive precision analog and RF applications, especially when associated with higher data rates.

In various applications, higher data rates require cleaner power rails to operate sensitive semiconductor devices. The problem becomes more severe as speeds increase and the geometry drops from 65nm to 28nm or lower.

The ADP176x and ADP715x LDOs support noise-sensitive applications such as RF transceivers, voltage-controlled oscillators, phase-locked-loop synthesizers, clocks, high-speed ADCs and DACs, and the number of such applications is increasing. Using the new LDO eliminates the need to add passive components such as additional external filters and bypass capacitors, thereby reducing PCB size and cost.

The ADP176x and ADP715x LDOs provide excellent noise and PSRR performance. The ADP176x family delivers up to 3A of output current and operates within an output voltage range of 0.5V to 1.5V. This combination of lower voltage output operation enables the meeting of high-current core rail requirements in various emerging applications.

The ADP715x family supports an output range of 1.2V to 3.3V and provides industry-leading noise performance of 1.6µVrms at 10Hz to 100kHz, while extending the LOD output current range to up to 2A at noise levels for ultra-low noise of less than 2µVrms at 100Hz to 100kHz. This combination of ultra-low noise and higher PSRR performance raises LDO power levels and establishes a new benchmark.