H- and MP- grade versions of the LTC3851A synchronous step-down DC/DC controller feature an input range from 4V to 38V and operating junction temperatures from -40°C to +150°C and -55°C to +150°C, respectively. A constant-frequency, current-mode architecture allows a selectable fixed or PLL frequency from 250 kHz to 750 kHz. Other features include tracking and adjustable soft-start. Available in MSOP-16 packages, prices for the LTC3851AH/-1 and LTC3851AMP/-1 are $2.24 (H-grade) and $5.29 (MP-grade) each/1,000, respectively. LINEAR TECHNOLOGY CORP., Milpitas, CA. (800) 454-6327.