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