EUP3425
5A, 1MHz Synchronous
Step-Down Converter
DESCRIPTION
The EUP3425 is a 1MHz fixed frequency synchronous,
current-mode, step-down dc-dc converter capable of
providing up to 5A output current. The EUP3425
operates from an input range of 2.7V to 5.5V and
provides a regulated output voltage from 0.8V to 5V.
The internal synchronous power switch increases
efficiency and eliminates the need for an external
Schottky diode. The EUP3425 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 EUP3425 features short circuit and thermal
protection circuits to increase system reliability.
Externally adjustable soft-start SS pin allows for proper
power on sequencing with respect to other power
supllies and avoids input inrush current during startup.
The EUP3425 is available in a low profile 14pin
3mm
×
4mm TDFN package .
FEATURES
2.7V to 5.5V Input Voltage Range
High Efficiency up to 96%
5A Available Load Current
35mΩ Integrated FET Switches
1MHz Switching Frequency
100% Duty Cycle Low Dropout Opetion
Short Circuit and Thermal Protection
Integrated UVLO and Power Good
Excellent Line and Load Transient Response
Adjustable Soft-start with An External
Capacitor
Adjustable Output Voltage Down to 0.8V
Available in 14pin 3mm
×
4mm TDFN Package
RoHS Compliant and 100% Lead(Pb)-Free
Halogen-Free
APPLICATIONS
Distributed 3.3V and 5V Power Supplies
High Performance DSPs, FPGAs, ASICs and
Microprocessors
Base Station, Telecom, and Networking
Equipment Power Supplies
EPC and NetPCs
Typical Application Circuit
Figure1. Adjustable Output Regulator
DS3425
Ver0.1
Mar. 2010
1
EUTECH [ EUTECH MICROELECTRONICS INC ]
