Sunnyvale, Calif.—Adding the ever-growing array of DC/DC converter and power-management ICs for engineers to consider, Akros Silicon Inc has introduced a family of ten pin- and footprint-compatible, multiple-output ICs which go beyond the basic power-conversion role.
The AS19xx series, dubbed Energy$ense by the vendor, claims to provide a system-level approach which includes real-time, on-chip power measurements and subsystem monitoring; efficiency as high as 94%, sleep-mode current below 10 μA, standby current under 4 mA (both with fast wake-up)and digital control of the analog closed loop via the I2C bus, along with switchable spread-spectrum clocking to reduce EMI peaks, as well as PWM-based dimming for LED-backlight control.
Applications include adaptive voltage scaling and dynamic power-down for processors, which can significantly reduce power consumption depending on CPU activity and even temperature; and start-up management using independent, coincident, or radiometric correlation of the power rails. The pre-biased output also facilitates rapid power cycling for maximum power savings.
The devices, all housed on a 5×5 mm, 32-lead QFN package, include an input-voltage range of 3 to 27 V. Functions available for each power rail include power measurement, voltage margining, enable/disable, power-good monitor, DCM/CCM mode control, light-load mode control; an overtemperature alarm is available for the entire IC. Switching frequency is user-selectable between 100 kHz and 2 MHz so users can trade off among attributes such as clock speed, efficiency, and passive-component size.
Pricing and availability: Prices for the ICs, which are specified for -40°C to +85°C, start at $1.46 each in 3,000-unit lots.
For more information: contact Akros Silicon Inc., http://www.akrossilicon.com .