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LDOs operate from 3.3-20V

Posted: 22 Nov 2011 ?? ?Print Version ?Bookmark and Share

Keywords:LDO? load performance? analog and mixed-signal circuit?

Analog Devices Inc. (ADI) has launched the ADP7102 and ADP7104, a couple of low dropout regulators (LDOs) that tout low noise, high power supply rejection and good line and load transient response. The devices reach 15?Vrms fixed-voltage noise and 60dB power supply rejection ratio (PSRR) at 10kHz in 3V. The LDOs also offer reverse current protection to protect against shorts and sudden load discharges, ADI noted.

According to the company, the products are designed to maximize load performance and yield higher data conversion accuracy and resolution in high-frequency communications infrastructure, medical imaging, and industrial and instrumentation applications.

 ADP7102, ADP7104

LDOs register 60dB power supply rejection ratio at 10kHz in 3V.

"ADI's newest LDOs are specially designed for noise-sensitive, high-performance loads typical of A/D and D/A converters, DSPs, FPGAs, precision amplifiers, high-frequency clocks, oscillators and PLL circuits," noted Laurence McGarry, marketing manager, ADI. "This improved load performance can enable higher converter frequency and accuracy, which in a medical ultrasound system, for example, can mean high image resolution."

The devices operate from 3.3-20V and are designed to regulate high-performance analog and mixed-signal circuits operating from 19-1.22V rails while achieving excellent line and load transient response with 1?F ceramic output, said ADI. The ADP7102 has a maximum output current of 300mA while the maximum output current of the ADP7104 is 500mA. Both LDOs are available in an 8-lead SOIC-EP and 3 x 3mm LFCSP package that provides excellent thermal performance for applications requiring up to 300mA of output current in a small, low-profile footprint.

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