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Eutech Microelectronics

EUP3409 Datasheet Preview

EUP3409 Datasheet

800mA Synchronous Step-Down Converter

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EUP3409
Dual 1.5MHz, 800mA Synchronous
Step-Down Converter
DESCRIPTION
The EUP3409 contains two independent 1.5MHz
constant frequency, current mode, PWM step-down
converters. Each converter integrates a main switch and
a synchronous rectifier for high efficiency without an
external Schottky diode. The EUP3409 is ideal for
powering portable equipment that runs from a single
cell Lithium-Ion (Li+) battery. Each converter can
supply 800mA of load current from a 2.5V to 5.5V
input voltage. The output voltage can be regulated as
low as 0.6V. The EUP3409 can also run at 100% duty
cycle for low dropout applications.
Typical Application Circuit
FEATURES
z Up to 96% Efficiency
z 1.5MHz Constant Switching Frequency
z 800mA Load Current on Each Channel
z 2.5V to 5.5V Input Voltage Range
z Output Voltage as Low as 0.6V
z 100% Duty Cycle in Dropout
z Current Mode Operation
z Short Circuit Protection
z Thermal Fault Protection
z <1µA Shutdown Current
z Soft Start Function
z Space Saving 10-Pin TDFN Package
z RoHS Compliant and 100% Lead(Pb)-Free
APPLICATIONS
z Cellular and Smart Phones
z Microprocessors and DSP Core Supplies
z PDAs and Portable Media Players
z Wireless and DSL Modems
z Digital Still and Video Cameras
DS3409 Ver1.0 Jan. 2008
Figure 1. Adjustable Voltage Regulator
1




Eutech Microelectronics

EUP3409 Datasheet Preview

EUP3409 Datasheet

800mA Synchronous Step-Down Converter

No Preview Available !

Block Diagram
EUP3409Tel: 0755-8398 3377 / 135 9011 2223 http://www.gofotech.com
Pin Configurations
Package Type
TDFN-10
Figure 2.
Pin Configurations
Pin Description
PIN
EN1
FB1
IN2
GND2
SW2
Pin
1
2
3
4
5
EN2
FB2
IN1
GND1
SW1
6
7
8
9
10
DESCRIPTION
Channel 1 Enable Control Input. Drive EN1 above 1.5V to turn on the Channel 1. Drive
EN1 below 0.3V to turn it off (shutdown current < 0.1µA).Do not leave EN1 floating.
Channel 1 Feedback.
Channel 2 Supply Input.
Ground 2.
Channel 2 Switch Node Connection to Inductor. This pin connects to the drains of the
internal main and synchronous power MOSFET switches.
Channel 2 Enable Control Input. Drive EN2 above 1.5V to turn on the Channel 2. Drive
EN2 below 0.3V to turn it off (shutdown current < 0.1µA). Do not leave EN2 floating.
Channel 2 Feedback.
Channel 1 Supply Input.
Ground 1.
Channel 1 Switch Node Connection to Inductor. This pin connects to the drains of the
internal main and synchronous power MOSFET switches.
DS3409 Ver1.0 Jan. 2008
2


Part Number EUP3409
Description 800mA Synchronous Step-Down Converter
Maker Eutech Microelectronics
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EUP3409 Datasheet PDF






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