EL7554
®
Data Sheet
May 8, 2006
FN7360.4
Monolithic 4 Amp DC-DC Step-Down
Regulator
Features
• Integrated MOSFETs
The EL7554 is a full-feature synchronous 4A step-down
regulator capable of up to 96% efficiency. This device
• 4A continuous output current
• Up to 96% efficiency
operates from 3V to 6V V input supply. With internal
IN
CMOS power FETs, the device can operate at up to 100%
duty ratio, allowing for output voltage range from 0.8V up to
• All ceramic capacitors
• Multiple supply start-up tracking
• Built-in ±5% voltage margining
nearly V .The adjustable high switching frequency of up to
IN
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.
• 3V to 6V input voltage
2
• 0.58 in 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
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.
• 28 Ld HTSSOP package
• Pb-free plus anneal available (RoHS compliant)
Applications
• Point-of-regulation power supplies
• FPGA Core and I/O supplies
• DSP, CPU Core, and IO supplies
• Logic/Bus supplies
The EL7554 is available in a 28 Ld HTSSOP package and is
specified for operation over the -40°C to +85°C temperature
range.
Ordering Information
• Portable equipment
PART
PART
TAPE&
PKG.
NUMBER
MARKING REEL
PACKAGE
DWG. #
Related Documentation
EL7554IRE
EL7554IRE-T7
7554IRE
7554IRE
-
7”
13”
-
28 Ld HTSSOP MDP0048
28 Ld HTSSOP MDP0048
28 Ld HTSSOP MDP0048
• Technical Brief 418 - Using the EL7554 Demo Board
• Easy to use applications software simulation tool available
at www.intersil.com/dc-dc
EL7554IRE-T13 7554IRE
EL7554IREZ
(See Note)
7554IREZ
28 Ld HTSSOP MDP0048
(Pb-free)
EL7554IREZ-T7 7554IREZ
(See Note)
7”
28 Ld HTSSOP MDP0048
(Pb-free)
EL7554IREZ-T13 7554IREZ
(See Note)
13”
28 Ld HTSSOP MDP0048
(Pb-free)
NOTE: Intersil Pb-free plus anneal 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.
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
1-888-INTERSIL or 1-888-468-3774 | Intersil (and design) is a registered trademark of Intersil Americas Inc.
Copyright Intersil Americas Inc. 2004-2006. All Rights Reserved
1
All other trademarks mentioned are the property of their respective owners.
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