EUP3451 Datasheet, PDF (1/1 Pages) Eutech Microelectronics Inc – 3A,30V,500KHz Step-Down Converter

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
z 35V Input Surge Protection
z 3A Output Current
z 0.135 Internal DMOS Output Switch
z 4.5V to 30V Input Operating Range
z Output Adjustable from 0.8V to 12V
z Up to 95% Efficiency
z 1µA Shutdown Current
z Fixed 500KHz Frequency
z Thermal Shutdown and Overcurrent Protection
z Input Supply Overvoltage and Undervoltage
Lockout
z Available SOP-8 Package
z RoHS Compliant and 100% Lead(Pb)-Free
APPLICATIONS
z PC Monitors
z Distributed Power Systems
z Networking Systems
z Portable Electronics
Typical Application Circuit
DS3451 Ver1.0 June 2009
Figure 1. 12V to 3.3V/5V Application Circuit
1