EUP3451
3A,30V,500KHz Step-Down Converter
DESCRIPTION
The EUP3451 is current mode, step-down switching
regulator capable of driving 3A continuous load with
excellent line and load regulation. The EUP3451 can
operate with an input voltage range from 4.5V to 30V
and the output can be externally set from 0.8V to 12V
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.
The EUP3451 require a minimum number of external
components.
FEATURES
35V Input Surge Protection
3A Output Current
0.135Ω Internal DMOS Output Switch
4.5V to 30V Input Operating Range
Output Adjustable from 0.8V to 12V
Up to 95% Efficiency
1µA Shutdown Current
Fixed 500KHz Frequency
Thermal Shutdown and Overcurrent Protection
Input Supply Overvoltage and Undervoltage
Lockout
Available SOP-8 Package
RoHS Compliant and 100% Lead(Pb)-Free
APPLICATIONS
PC Monitors
Distributed Power Systems
Networking Systems
Portable Electronics
Typical Application Circuit
Figure 1. 12V to 3.3V/5V Application Circuit
DS3451
Ver1.0
June 2009
1
EUTECH [ EUTECH MICROELECTRONICS INC ]
