Power management

Vishay Intertechnology has announced a new 1/10-W surface-mount Power Metal Strip resistor that is said to be industry’s smallest such device.


Vishay Intertechnology

has announced a new 1/10-W surface-mount Power Metal Strip resistor that is said to be industry’s smallest such device to combine a low 15-m to 100-m resistance range, a tight tolerance of 1%, and low RTC values down to ±75 ppm/C°.

Available in the 0603 package size, the new WSL0603 resistor serves in all types of current-sensing, voltage division, and pulse applications. It is intended for power management in cell phones and pagers; electronic automotive systems including engine controls, audio electronics, and climate controls; and disc drive motor control and dc-to-dc converters in computers.

With its very small footprint, low resistance values, and low RTC, the new resistor facilitates current-sensing accuracy, which in turn allows designers to use lower-cost ICs. The surface-mount WSL0603 resistor may be used in lieu of larger components or multiple high-value resistors running in parallel to provide space savings on the printed circuit board, thereby enabling design of smaller and lighter end products.

In addition to a power rating of 0.1W, the Vishay Dale WSL0603 offers low inductance values from 0.5nH to 5nH, excellent frequency response, and low thermal EMF. It is rated for an operating temperature range of –65° C to +170° C.

The new device, which features an all-welded construction with solderable terminations, is easily placed with automated assembly equipment. It is available with a solid metal nickel-chrome alloy resistive element.

The WSL0603 is available in tape-and-reel packaging. Samples and production quantities of the new resistor are available now, with a lead time of four to five weeks for larger orders.