®
EL7554
Data Sheet
January 31, 2005
FN7360.2
Monolithic 4 Amp DC-DC Step-Down
Regulator
The EL7554 is a full-feature synchronous 4A step-down
regulator capable of up to 96% efficiency. This device
operates from 3V to 6V V
IN
input supply. With internal
CMOS power FETs, the device can operate at up to 100%
duty ratio, allowing for output voltage range from 0.8V up to
nearly V
IN
.The adjustable high switching frequency of up to
1MHz enables the use of small components, making the
whole converter occupy less than 0.58 square inch with
components on one side of the PCB. The EL7554 operates
at constant frequency PWM mode, making external
synchronization possible. The EL7554 features soft-start
and full start-up control, which eliminates the in-rush current
and enables users to control the start-up of multiple
converters to any configuration with ease. The EL7554 also
offers a ±5% voltage margining capability that allows raising
and lowering of the supplies derived from the EL7554 to
validate the performance and reliability of system cards
quickly and easily during manufacturing testing. A junction
temperature indicator conveniently monitors the silicon die
temperature, saving designers time in the tedious thermal
characterization.
An easy-to-use simulation tool is available for
download
and
can be used to modify design parameters such as switching
frequency, voltage ripple, ambient temperature, as well as
view schematics waveforms, efficiency graphs, and
complete BOM with Gerber layout.
The EL7554 is available in a 28-pin HTSSOP package and
is specified for operation over the -40°C to +85°C
temperature range.
Features
• Integrated MOSFETs
• 4A continuous output current
• Up to 96% efficiency
• All ceramic capacitors
• Multiple supply start-up tracking
• Built-in ±5% voltage margining
• 3V to 6V input voltage
• 0.58 in
2
footprint with components on one side of PCB
• Adjustable switching frequency to 1MHz
• Oscillator synchronization possible
• 100% duty ratio
• Junction temperature indicator
• Over-temperature protection
• Internal soft-start
• Variable output voltage down to 0.8V
• Power-good indicator
• 28-pin HTSSOP package
• Pb-free available (RoHS compliant)
Applications
• Point-of-regulation power supplies
• FPGA Core and I/O supplies
• DSP, CPU Core, and IO supplies
• Logic/Bus supplies
Ordering Information
PART
NUMBER
EL7554IRE
EL7554IRE-T7
EL7554IRE-T13
EL7554IREZ
(See Note)
EL7554IREZ-T7
(See Note)
EL7554IREZ-
T13 (See Note)
PACKAGE
28-Pin HTSSOP
28-Pin HTSSOP
28-Pin HTSSOP
28-Pin HTSSOP
(Pb-free)
28-Pin HTSSOP
(Pb-free)
28-Pin HTSSOP
(Pb-free)
TAPE &
REEL
-
7”
13”
-
7”
13”
PKG. DWG. #
MDP0048
MDP0048
MDP0048
MDP0048
MDP0048
MDP0048
• Portable equipment
Related Documentation
• Technical Brief 418 - Using the EL7554 Demo Board
• Easy to use applications software simulation tool available
at
www.intersil.com/dc-dc
NOTE: Intersil Pb-free products employ special Pb-free material sets; molding
compounds/die attach materials and 100% matte tin plate termination finish, which are
RoHS compliant and compatible with both SnPb and Pb-free soldering operations.
Intersil Pb-free products are MSL classified at Pb-free peak reflow temperatures that
meet or exceed the Pb-free requirements of IPC/JEDEC J STD-020.
1
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
1-888-INTERSIL or 1-888-352-6832
|
Intersil (and design) is a registered trademark of Intersil Americas Inc.
Copyright Intersil Americas Inc. 2004, 2005. All Rights Reserved
All other trademarks mentioned are the property of their respective owners.
INTERSIL [ INTERSIL CORPORATION ]
