[Aerosemi Proprietary Information]

GENERAL DESCRIPTION
The M3406 is a constant frequency, current mode step-down converter. The device integrates a main switch and a synchronous rectifier for high efficiency without an external Schottky diode. It is ideal for powering portable equipment that runs from a single cell Lithium-Ion (Li+) battery. The output voltage can be regulated as low as 0.6V. The M3406 can also run at 100% duty cycle for low dropout operation, extending battery life in portable system. This device offers two operation modes, PWM control and PFM Mode switching control, which allows a high efficiency over the wider range of the load.
The M3406 is offered in a low profile 5-pin, SOT package, and is available in an adjustable version.

FEATURES
● High Efficiency: Up to 96%
● 1.5MHz Constant Frequency Operation
● 800mA Output Current
● No Schottky Diode Required
● 2V to 6V Input Voltage Range
● Output Voltage as Low as 0.6V
● PFM Mode for High Efficiency in Light Load
● 100% Duty Cycle in Dropout Operation
● Low Quiescent Current: 20μA
● Slope Compensated Current Mode Control for
   Excellent Line and Load Transient Response
● Short Circuit Protection
● Thermal Fault Protection
● Inrush Current Limit and Soft Start
● <1μA Shutdown Current
● SOT23-5 package

APPLICATIONS
● Cellular and Smart Phones
● Wireless and DSL Modems
● PDAs
● Portable Instruments
● Digital Still and Video Cameras
● DTV