Low Noise Low Dropout Regulator (LDO) Simplifies Powering Noise Sensitive RF Applications

Date
12/14/2011

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1.8V to 6V Input Voltage Serves Low Voltage Core and RF Circuit Power Supplies

Exar Corporation has released the XRP6272, a new low noise high performance LDO for up to 2 Amps point-of-loads. Supporting a single 1.8V to 6V wide input voltage rail, the XRP6272 provides a 2 Amps point-of-load with an adjustable output voltage. It is equally capable of delivering power from as low as 0.7V for core voltage to a 5V for RF circuitry. Very low output noise combined with a high Power Supply Rejection Ratio (PSSR) makes it the ideal device for noise sensitive applications. The XRP6272's very low quiescent current provides enough versatility and performances to be used in portable equipment. "The XRP6272 provides a unique point-of-load solution suitable for both low voltage core and 5V RF supplies," said Eric Pittana, director of marketing, Power Product Line. "It simplifies power management component selection to one single device for these architectures. The design flexibility of the XRP6272 will accelerate time-to-market for OEMs by reducing the complexity of their power designs. The XRP6272 joins an expansive family of market proven LDOs that are deployed successfully in varied applications and environments." Key Product Features Capable of a constant output current of up to 2 Amps, the XRP6272 supports a wide 1.8V to 6V input voltage range which allows for single supply operations from numerous industry standard power rails as well as the dedicated RF 5.8V rail. Better than +/-2% output voltage accuracy, low 24μVRMS output noise and 70dB PSRR make the XRP6272 perfectly suited for powering wireless RF circuitries. With an adjustable output voltage as low as 0.7V, this device is also capable of powering core processors and FPGAs. Allowing usage of small low cost ESR ceramic output capacitors and featuring a low 30μA quiescent current, the XRP6272 is optimized for use in battery powered portable equipments while an Enable function and Power Good flag complete the feature set. Built-in current limit and thermal protections provide the XRP6272 with fail-safe operations. Power Management Products Highly reliable, accurate, power management is a critical part of any technology system. Exar has a broad array of high-performance and industry-proven power management solutions including handset and lighting controls, power conversion, and standard linear devices. Prices, Packages, Availability and Additional Information The XRP6272 is available now in volume quantities and offered in a RoHS compliant, "green" halogen free 5-pin TO-252 package and 8-pin exposed pad HSOIC package. Pricing starts at $0.39 for 1K units. www.exar.com

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