DESCRIPTION

synchronous step-down dc-dc converter optimized to

supply the different sub systems of smart-phones,

Tablets, and portable applications powered by one cell

Li−Ion or three cell Alkaline/NiCd/NiMH batteries. The

device is able to deliver up to 5A, with programmable

output voltage from 0.6 V to 1.4V.

frequency which allows the use of small low cost

inductors and capacitors. During light load conditions,

the regulator includes a PFM mode to enhance

light-load efficiency. The regulator transitions smoothly

between PWM and PFM modes. Synchronous

rectification and automatic PWM/PFM transitions

improve overall efficiency.

The serial interface is compatible with Fast/Standard

and High-Speed mode I2C specification allowing

transfers at up to 3.4 Mbps. This communication

interface is used for dynamic voltage scaling with

voltage steps down to 6.25 mV, for reprogramming the

mode of operation (PFM or Forced PWM) or

disable/enabling the output voltage.

FEATURES

2.7V to 5.5V Input Voltage Range

3MHz Constant Switching Frequency

5A Available Load Current

I

2C Control Interface with Dynamic Voltage

Scaling Support

Programmable Output Voltage: 0.6V to 1.4V in

6.25mV Steps

Small size, 0.33µH or 0.47µH Inductor Solution

52µA Typical Quiescent Current

PFM/PWM Operation for Optimum Increased

Efficiency

Excellent Load and Line Transient Response

Short Circuit and Thermal Protection

Available in 2.0mm×1.6mm WCSP-20 Package

RoHS Compliant and 100% Lead(Pb)-Free

Halogen-Free

APPLICATIONS

Smart Phones

Tablets

Low-Voltage DSPs and Processors Core Power

Supplies