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LDOs offer reverse current protection

Posted: 23 Nov 2011     Print Version  Bookmark and Share

Keywords:LDO  load performance  medical imaging 

Analog Devices Inc. (ADI) reveals the ADP7102 and ADP7104, a couple of low dropout regulators (LDOs) that are said to be designed to maximise load performance and yield higher data conversion accuracy and resolution in high-frequency communications infrastructure, medical imaging, and industrial and instrumentation applications.

The ADP7102 and ADP7104 LDOs tout low noise, high power supply rejection and good line and load transient response. The devices reach 15µVrms 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, according to ADI.

 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 analogue and mixed-signal circuits operating from 19-1.22V rails while achieving excellent line and load transient response with 1µF 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 3x3mm 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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