VR12.5 transient response specs exceeded by 4-phase buck controller

October 11, 2013 // By Graham Prophet
Intersil's ISL95816’s is a point-of-load regulator the CPUs, with a wide input voltage range provides an efficient computing power solution.

ISL95816 is a core controller that powers Intel VR12.5 central processors. Featuring a wide input voltage range and excellent fast load transient response, the ISL95816 controller is suitable for mobile computing applications. The four-phase buck controller is based on a design that not only supports the requirements of Intel VR12.5 processors, but also offers the best-available dynamic transient response. Its wide input voltage range of 4.6V to 19V lets designers use either narrow VDC or traditional adapters. The new device also provides PWM outputs that can be used with either external drivers or compatible DrMOS solutions, offering added flexibility for designers.

Using Intersil’s R3 modulator, the ISL95816 buck controller offers fast load transient response with minimal ringing on the output voltage. The R3 modulator performance enables support for the VR12.5 specifications at lower switching frequencies and less output capacitance.

• Programmable switching frequency offers design flexibility by allowing for the use of a broad range of output filters

• Integrated over-current, over temperature, and over/under-voltage protection prevent shutdown

• Output voltage regulation is available between 0.5V and 2.3V

In a small form factor 32-lead 3 x 4mm QFN package, prices start at $2.49 (1,000). A complete evaluation board, the ISL95816EVAL7Z, is available for $699.

Intersil; www.intersil.com/products/ISL95816