Digital control IC significantly boosts battery life

The International Rectifier IR3588 CHiL digital control IC, as well as IR3552 and IR3548 single and dual-phase PowIRstage devices, are small devices that meet Intel’s VR12.6 specifications for 15 and 25-W Ultrabook laptop computers.

Said to significantly extend battery life, the IR3588 and optimized single-phase and dual-phase IR3552 and IR3548 PowIRstage devices reduce footprint by more than 50% compared to monolithic solutions and offer a 40% smaller footprint compared to alternative reference designs. Additionally, the IR chips extend battery life as a result of the IR3588 low quiescent current while offering lower operating current and sleep-state power of less than 1 mW, which exceeds Intel’s VR12.6 Ultrabook power specifications. Batteries also last longer because of IR’s regenerative braking technique, which returns energy to the battery that is normally lost when waking a laptop computer from a sleep state.

The IR3588 matched with the dual-phase IR3548 is optimized for high performance Ultrabooks up to 25 W, while the IR3588 paired with the single-phase IR3552 is designed for standard Ultrabooks up to 15 W.

The IR3588 maintains full digital flexibility and telemetry and offers true-off capability for PS4. The device also offers clean ultrafast DVID Up and Down performance, lossless input current telemetry, and supports up to 1.5 MHz per phase.

The new PowIRstage devices integrate a low quiescent synchronous buck gate driver, and synchronous MOSFETs and Schottky diode into a compact PQFN package. The devices have an input range of 4.5 to 16 V and can be operated up to 1.5 MHz, and true-off capability enabling the driver to shut off to minimize quiescent current.

The dual-phase IR3548 PowIRstage device supports up to 30 A per phase and delivers up to 95% efficiency at 7.2 to 1.8 Vnom in a 6 x 8 mm PQFN package. The single-phase IR3552 supports up to 40 A and offers 94% efficiency at 12 to 1.8 Vnom in a 4 x 6 mm PQFN package.

For more information, contact International Rectifier, 233 Kansas St., El Segundo, CA 90245. Phone: (310) 252-7105.