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EUP3484A Datasheet

340KHz Synchronous Step-Down Converter

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EUP3484A pdf
3A, 30V, 340KHz Synchronous
Step-Down Converter
The EUP3484A is a synchronous current mode buck
regulator capable of driving 3A continuous load current
with excellent line and load regulation. The EUP3484A
can operate with an input range 4.5V to 30V and the
output can be externally set from 0.925V to 20V with a
resistor divider.
Fault condition protection includes cycle-by-cycle
current limiting and thermal shutdown. In shutdown
mode the regulator draws 1µA of supply current.
Programmable soft-start minimizes the inrush supply
current and the output overshoot at initial startup.
Automatic pulse skipping mode operation increase
efficiency at light loads.
The EUP3484A require a minimum number of external
Typical Application Circuit
3A Output Current
Automatic Pulse Skipping Mode at Light Load
35V Input Surge Protection
Integrated 160m/110mDMOS Switches
4.5V to 30V Input Operating Range
Output Adjustable from 0.925V to 20V
Up to 95% Efficiency
1µA Shutdown Current
Fixed 340KHz Frequency
Programmable Soft-Start
Thermal Shutdown and Overcurrent Protection
Input Supply Overvoltage and Undervoltage
230ns Minimum On Time
Available in SOP-8 (EP) Package
RoHS Compliant and 100% Lead(Pb)-Free
Distributed Power Systems
Networking Systems
PC Monitors
Portable Electronics
DS3484A Ver1.5 May 2012
Figure 1. 12V to 3.3V/5V Application Circuit
Eutech Microelectronics
Eutech Microelectronics

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