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EL7554

Monolithic 4A DC/DC Step-Down Regulator

Renesas Electronics 

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 VIN 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

VIN.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.

Ordering Information

PART

NUMBER

PART

MARKING

TEMP.

RANGE

(°C)

PACKAGE

PKG.

DWG. #

EL7554IRE* 7554IRE -40 to +85 28 Ld HTSSOP MDP0048

EL7554IREZ* 7554IREZ -40 to +85 28 Ld HTSSOP MDP0048

(See Note)

(Pb-free)

*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.

DATASHEET

FN7360

Rev 5.00

November 5, 2007

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 in2 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

FN7360 Rev 5.00

November 5, 2007

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