Buck-Boost and Boost+Bypass Switching Regulators

Now for the our last discussion for this week, we will be having Intersil's Buck-Boost and Boost+Bypass Switching Regulators. For this past few days, we have discussed various advancements in the field of electronics. We had Mouser's MEMS, both of IXYS' power electronics and differential ultra-fast laser diode driver, Coilcraft's inductors, Microchip's development platform with 2D multi-touch and 3D gestures, and Allegro's A4915.

Intersil's ISL911xx family of buck-boost and boost switching has expanded with the addition of five new devices. This family is designed to support system power supplies and peripherals like Wi-Fi- or 3G/4G RF power amplifiers. These five new devices include the ISL91106 and ISL91107 buck-boost regulators, and the ISL91132, ISL91133 and ISL91134 high-efficiency boost+bypass regulators. Intersil’s proprietary four-switch buck-boost architecture extends battery life by enabling industry leading efficiency of up to 96% and providing smooth transitions from buck to boost to prevent glitches and noise in smartphones, tablets and other single-cell lithium ion (Li-ion) or Li-polymer battery systems.

The ISL9110x buck-boost regulator family is capable of working with the ultra-small inductors and capacitors to fit within less than 14mm² board footprint, making them the ideal 2A switching converter solution for space-constrained mobile devices. The advanced wafer-level CSP package requires only a single inductor and very few external components, which minimizes overall space requirements. The ISL911xx regulators’ 2.5MHz switching frequency further reduces the power supply solution size.

BUCK-BOOST REGULATORS

ISL91106, ISL91107 and ISL91108 are highly-integrated buck-boost switching regulators that accept input voltages either above or below the regulated output voltage. Unlike other buck-boost regulators, these regulators automatically transition between operating modes without significant output disturbance.

The ISL91110 is a high-current buck-boost switching regulator for systems using new battery chemistries. It uses Intersil’s proprietary buck-boost algorithm to maintain voltage regulation while providing excellent efficiency and very low output voltage ripple when the input voltage is close to the output voltage.

BOOST REGULATORS

The ISL91132, ISL91133 and ISL91134 are integrated boost switching regulators for battery powered applications. These devices provide a power supply solution for products using a one cell Li-ion or Li-polymer battery.
ISL91117 is a highly-integrated boost switching regulator for battery powered applications. The device provides a power supply solution for products using dual-cell or three-cell alkaline, NiCd or NiMH, or one-cell Li-ion or Li-polymer battery.

To learn more about Intersil's ISL911xx, click on the link below:
http://www.eeweb.com/company-news/intersil/buck-boost-and-boostbypass-switching-regulators