New Industry Products

Sipex Inros SP6120 PWM Controller

December 07, 2000 by Jeff Shepard

Sipex Corp. (Billerica, MA) reports developing a new synchronous buck controller, the SP6120. This new device is a fixed-frequency, voltage-mode, synchronous, PWM controller.

Features include one percent reference, 100 percent frequency accuracy, 40mV over-current detection, 950uA quiescent current, and 10uA sleep current; all these are specified over the full range of input voltage and operating temperature, 3V to 7V and -40 degrees C to 85 degrees C respectively.

Sipex claims that the high-speed operation of the SP6120 minimizes board space. They maintain that the new device is programmable from 200kHz to 600kHz with a simple resistor to ground. For battery applications, a programming pin allows for discontinuous conduction mode. AnyFET technology allows the user to select the high side-switching device, NFET or PFET, without having to change controllers.

Load-step response is provided by a proprietary algorithm that provides 0 to 100 percent duty cycle control without compromising ease of use. The device also provides a programmable soft-start function that limits excess inrush current during start-up.