EUP3427
4A, Synchronous Step-Down Converter
DESCRIPTION
The EUP3427 is a 1 MHz fixed frequency synchronous,
current-mode, step-down dc-dc converter capable of
providing up to 4A output current. The EUP3427
operates from an input range of 2.7V to 5.5V and
provides a regulated output voltage from 0.6V to 5V.
The internal synchronous power switch improves
efficiency and eliminates the need for an external
Schottky diode. The EUP3427 can be externally set for
either forced PWM continuous mode or pulse skipping
mode. Forced PWM operation provides very low output
ripple voltage for noise sensitive applications while
pulse skipping operation improves light load efficiency
by reducing switching loss.
The EUP3427 features short circuit and thermal
protection circuits to improve system reliability.
Internally soft-start avoids input inrush current during
startup. The EUP3427 is available in SOP-8 package
with the exposed pad and TDFN-10 package.
FEATURES
2.7V to 5.5V Input Voltage Range
High Efficiency up to 96%
4A Available Load Current
57/35m Integrated PFET/NFET Switches
1MHz Switching Frequency
100% Duty Cycle Low Dropout Operation
Short Circuit and Thermal Protection
Integrated UVLO and Power Good
Excellent Line and Load Transient Response
Available in SOP-8 (EP) and TDFN-10 Packages
RoHS Compliant and 100% Lead(Pb)-Free
Halogen-Free
APPLICATIONS
High Performance DSPs, FPGAs, ASICs and
Microprocessors
Base Station, Telecom, and Networking
Equipment Power Supplies
ePC and NetPCs
Typical Application Circuit
Figure1. SOP-8(EP) Typical Application Circuit
DS3427
Ver1.0
Jul. 2011
1
EUTECH [ EUTECH MICROELECTRONICS INC ]
