Powerelectronics 1765 Pet0805exar

High Frequency, Step-Down Regulator for EMC/EMI Sensitive Applications

Aug. 8, 2013
Exar Corporation expanded its family of low voltage, step down regulators with the addition of the XRP6670.

Exar Corporation expanded its family of low voltage, step down regulators with the addition of the XRP6670. The programmable operating frequency of the XRP6670 offers power design engineers increased flexibility in optimizing component values, size and performance enabling precise management of electromagnetic interference (EMI) compliance and electromagnetic compatibility (EMC).

Operating from a 2.6V to 5.5V input voltage range, the XRP6670 is capable of supplying up to 3A continuously with an adjustable output voltage as low as 0.8V. This synchronous PWM voltage regulator can accommodate a broad range of inductor and output capacitor values through its constant 300kHz to 2.5MHz programmable operating frequency.  Additionally, the adjustable frequency range of the XRP6670, which is set via a single resistor, allows the user to optimize size, transient response and efficiency while precisely positioning the fundamental operating frequency and subsequent harmonics. Ideal for industrial, medical, and audio and video equipment, the XPR6670, with its compact form factor and reduced component count, is also ideal for space sensitive applications.

The XRP6670 allows for single supply operation from industry standard 3.3V and 5V power rails. Based on a current mode PWM control scheme, the XRP6670 operating frequency is programmable between 300kHz and 2.5MHz via an external resistor. It provides a low output voltage ripple, excellent line and load regulation and has a 100% duty cycle LDO mode. Output voltage is adjustable to as low as 0.8V with a better than 2% accuracy. Additionally, built-in over-temperature, over-current, short circuit and under-voltage lock-out protections insure safe operations under abnormal operating conditions.

  The XRP6670 comes standard in a compact 3mm x 3mm, RoHS compliant, Halogen Free 10-Pin DFN Package. The XRP6670 is available now with pricing starting at $1.05 in 1,000 unit quantities.  Samples and evaluation boards are available to customers.


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