EUP3458
DS3458 Ver0.2 Apr. 2011
1
1.2A,30V,1.2MHz Step-Down Converter
DESCRIPTION
The EUP3458 is current mode, step-down switching
regulator capable of driving 1.2A continuous load with
excellent line and load regulation. The EUP3458 can
operate with an input voltage range from 4.5V to 30V
and the output can be externally set from 0.8V to 15V
with a resistor pider.
Fault protection includes cycle-by-cycle current
limiting and thermal shutdown. In shutdown mode the
regulator draws 1µA of supply current. Internal
soft-start minimizes the inrush current and the output
overshoot.
The EUP3458 is available in SOT23-6 and TSOT23-6
packages.
Typical Application Circuit
FEATURES
1.2A Output Current
0.3Ω Internal DMOS Output Switch
4.5V to 30V Input Operating Range
Output Adjustable from 0.8V to 15V
Up to 92% Efficiency
1µA Shutdown Current
Fixed 1.2MHz Frequency
Thermal Shutdown and Overcurrent Protection
Input Supply Undervoltage Lockout
Available in SOT23-6 and TSOT23-6 Packages
RoHS Compliant and 100% Lead(Pb)-Free
Halogen-Free
APPLICATIONS
Distributed Power Systems
Battery Charger
Pre-Regulator for Linear Regulators
WLED Drivers
Figure 1. 12V/24V to 3.3V Application Circuit
