1
®
FN7360.5
EL7554
Monolithic 4A 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 Ld 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 Ld 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
• 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
Ordering Information
PART
NUMBER
PART
MARKING
TEMP.
RANGE
(°C) PACKAGE
PKG.
DWG. #
EL7554IRE* 7554IRE -40 to +85 28 Ld HTSSOP MDP0048
EL7554IREZ*
(See Note)
7554IREZ -40 to +85 28 Ld HTSSOP
(Pb-free)
MDP0048
*Add “-T7” or “-T13” suffix for tape and reel. Please refer to TB347 for
details on reel specifications.
NOTE: These Intersil Pb-free plastic packaged products employ
special Pb-free material sets; molding compounds/die attach
materials and 100% matte tin plate PLUS ANNEAL - e3 termination
finish, which is 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.
Data Sheet November 5, 2007
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. 2004-2007. All Rights Reserved
All other trademarks mentioned are the property of their respective owners.
