EUP3406 Datasheet, PDF (1/11 Pages) Eutech Microelectronics Inc – 1.5MHz, 600mA Synchronous Step-Down Converter

EUP3406
1.5MHz, 600mA Synchronous
Step-Down Converter
DESCRIPTION
The EUP3406 is a constant frequency, current mode,
PWM step-down converter. The device integrates a
main switch and a synchronous rectifier for high
efficiency. The 2.5V to 5.5V input voltage range makes
the EUP3406 ideal for powering portable equipment
that runs from a single cell Lithium-Ion (Li+) battery or
3-cell NiMH/ NiCd batteries. The output voltage can be
regulated as low as 0.6V. The EUP3406 supports up to
600mA load current and can also run at 100% duty
cycle for low dropout applications, extending battery
life in portable systems.
Switching frequency is internally set at 1.5MHz,
allowing the use of small surface mount inductor and
capacitors. The internal synchronous switch increases
efficiency while eliminate the need for an external
Schottky diode. The EUP3406 is available in a low
profile 5 lead SOT package.
FEATURES
z High Efficiency
z 1.5MHz Constant Switching Frequency
z 600mA Available Load Current
z 270µA Typical Quiescent Current
z 2.5V to 5.5V Input Voltage Range
z Adjustable Output Voltage as Low as 0.6V
z 100% Duty Cycle Low Dropout Operation
z No Schottky Diode Required
z Short Circuit and Thermal Protection
z Over Voltage Protection
z
1µA Shutdown Current
z Available in SOT23-5 Package
z RoHS Compliant and 100% Lead(Pb)-Free
APPLICATIONS
z Cellular and Smart Phones
z Portable Media Players/ MP3 Players
z Digital Still and Video Cameras
z Portable Instruments
z WLAN PC Cards
Typical Application Circuit
DS3406 Ver1.2 Nov. 2007
Figure1.
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