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Eutech Microelectronics

EUP3421 Datasheet Preview

EUP3421 Datasheet

Synchronous Step-Down Converter

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EUP3421
2A, Synchronous Step-Down Converter
DESCRIPTION
The EUP3421 is a 1 MHz fixed frequency synchronous,
current-mode, step-down dc-dc converter capable of
providing up to 2A output current. The EUP3421
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 improves
efficiency and eliminates the need for an external
Schottky diode. Forced PWM operation provides very
low output ripple voltage for noise sensitive
applications.
The EUP3421 features short circuit and thermal
protection circuits to improve system reliability.
Externally adjustable soft-start avoids input inrush
current during startup. The EUP3421 is available in
SOP-8 package.
FEATURES
2.7V to 5.5V Input Voltage Range
High Efficiency up to 96%
2A Available Load Current
100/60mIntegrated PFET/NFET Switches
1MHz Switching Frequency
100% Duty Cycle Low Dropout Operation
Short Circuit and Thermal Protection
Integrated UVLO
Excellent Line and Load Transient Response
Available in SOP-8 Package
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
DS3421 Ver1.0 Jun. 2011
Figure1. Typical Application Circuit
1




Eutech Microelectronics

EUP3421 Datasheet Preview

EUP3421 Datasheet

Synchronous Step-Down Converter

No Preview Available !

Pin Configurations
Package Type
Pin Configurations
EUP3421
SOP-8
Pin Description
PIN
AVIN
SOP-8
1
SS 2
GND
FB
3
4
EN 5
PGND
6
LX 7
PVIN
8
DESCRIPTION
Analog input supply which is connected to PVIN through a low pass RC filter.
Soft-start pin. An internal pull up current source charges an external capacitor to set
the soft-start ramp rate.
Analog ground.
Feedback pin. Connect it to an external resistor divider to set output voltage.
Chip enable pin. Forcing this pin above 1.5V enables the part. Forcing this pin below
0.3V shut down the device. Internal pull high with a resistor.
Power ground.
Switch node connected to inductor. This pin is connected to the drains of the internal
main and synchronous power MOSFET switches.
Bypass with a 10µF or 22µF ceremic capacitor to ground.
DS3421 Ver1.0 Jun. 2011
2


Part Number EUP3421
Description Synchronous Step-Down Converter
Maker Eutech Microelectronics
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EUP3421 Datasheet PDF






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