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EUP3409

Eutech Microelectronics
Part Number EUP3409
Manufacturer Eutech Microelectronics
Description 800mA Synchronous Step-Down Converter
Published Jul 18, 2014
Detailed Description EUP3409 Dual 1.5MHz, 800mA Synchronous Step-Down Converter DESCRIPTION The EUP3409 contains two independent 1.5MHz const...
Datasheet PDF File EUP3409 PDF File

EUP3409
EUP3409

Overview
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.
FEATURES z z z z z z z z z z z z z Up to 96% Efficiency 1.
5MHz Constant Switching Frequency 800mA Load Current on Each Channel 2.
5V to 5.
5V Input Voltage Range Output Voltage as Low as 0.
6V 100% Duty Cycle in Dropout Current Mode Operation Short Circuit Protection Thermal Fault Protection <1µA Shutdown Current Soft Start Function Space Saving 10-Pin TDFN Package RoHS Compliant and 100% Lead(Pb)-Free APPLICATIONS z z z z z € Typical Application Circuit Cellular and Smart Phones Microprocessors and DSP Core Supplies PDAs and Portable Media Players Wireless and DSL Modems Digital Still and Video Cameras VÛm w`R •yÑb ww w.
g ofot ech.
com Figure 1.
Adjustable Voltage Regulator DS3409 Ver1.
0 Jan.
2008 1 N~§NãtÿmñW3^VÛmw`R•yÑb€g–PQlSø Tel: 0755-8398 3377 / 135 9011 2223 http://www.
gofotech.
com EUP3409 Block Diagram Figure 2.
Pin Configurations Package Type Pin Configurations TDFN-10 VÛm w`R •yÑb € Pin Description ww w.
g ofot ech.
com PIN EN1 FB1 IN2 GND2 SW2 EN2 FB2 IN1 GND1 SW1 Pin 1 2 3 4 5 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 a...


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