EL7554IREZT13 INTERSIL [Intersil Corporation], EL7554IREZT13 Datasheet

EL7554IREZT13

Manufacturer Part Number

EL7554IREZT13

Description

Monolithic 4 Amp DC-DC Step-Down Regulator

Manufacturer

INTERSIL [Intersil Corporation]

Datasheet

1.EL7554IREZT13.pdf (14 pages)

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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

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

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

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.

Ordering Information

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.

EL7554IRE

EL7554IRE-T7

EL7554IRE-T13

EL7554IREZ

(See Note)

EL7554IREZ-T7

(See Note)

EL7554IREZ-

T13 (See Note)

NUMBER

PART

.The adjustable high switching frequency of up to

28-Pin HTSSOP

PACKAGE

(Pb-free)

input supply. With internal

TAPE &

Data Sheet

REEL

13”

7”

download

PKG. DWG. #

MDP0048

1-888-INTERSIL or 1-888-352-6832

and

CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.

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

• 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

• Portable equipment

Related parts for EL7554IREZT13

EL7554IREZT13 Summary of contents

Page 1

Data Sheet Monolithic 4 Amp DC-DC Step-Down Regulator The EL7554 is a full-feature synchronous 4A step-down regulator capable 96% efficiency. This device operates from input supply. With internal IN CMOS power FETs, ...

Page 2

Typical Application Diagram R 2 10. 12.7K V OUT (1.8V, 4A) 47µF 2 EL7554 COMP SGND 28 220pF 0.018µF 2.32K 2 VREF COSC 27 0.018µ STN STP ...

Page 3

Absolute Maximum Ratings ( SGND -0.3V to +6.5V IN ...

Page 4

DC Electrical Specifications V PARAMETER DESCRIPTION V EN Input High Level EN_HI V EN Input Low Level EN_LO I Enable Pull-up Current EN TM, S Input High Level EL_HI TM, S Input Low Level EL_LO Pin Descriptions PIN NUMBER PIN ...

Page 5

Block Diagram V TJ JUNCTION TEMPERATURE V DD 2.2nF EN STP POWER TRACKING STN EA COMP SGND 5 EL7554 TM 0.018µF 220pF SEL V C REF OSC VOLTAGE OSCILLATOR REFERENCE PWM CONTROLLER DRIVERS CURRENT SENSE V ...

Page 6

Typical Performance Curves 3.3V 1.8V 4A 2.2µ =3.3V O 0.95 0.9 0.85 V =0.8V O 0.8 V = 0.7 ...

Page 7

Typical Performance Curves 3.3V 1.8V 4A 2.2µ 610 605 V =5V IN 600 595 V =3.3V 590 IN 585 0 0 ...

Page 8

Waveforms 3.3V 1.8V 4A 2.2µ 0.5ms/DIV FIGURE 12. START-UP 50µs/DIV FIGURE 14. SHUT-DOWN 1ms/DIV FIGURE 16. VOLTAGE MARGINING 8 EL7554 = 2x10µ 47µF, ...

Page 9

Waveforms (Continued 3.3V 1.8V 4A 2.2µ 100µ 150µF OUT 2ms/DIV FIGURE 18. ADJUSTABLE START-UP Detailed Description The EL7554 is a ...

Page 10

PFET switch, achieving V close The maximum achievable × – DSON1 O Where R is the ...

Page 11

Figure 18 shows the waveforms. C 0.1µF STN - + STP 200K EL7554 V IN FIGURE 21. ADJUSTABLE START-UP In this application, C and C may be increased to IN OUT reduce input/output ripple because the pulse ...

Page 12

ESR to satisfy the output ripple ∆V requirement: O ∆V ∆I × ESR = O L When output has a step load change ∆I drop is ESR*∆I . Then V will drop even further before the ...

Page 13

Thermal Management The EL7554IRE is packaged in a thermally-efficient HTSSOP-28 package, which utilizes the exposed thermal pad at the bottom to spread heat through PCB metal. Therefore: 1. The thermal pad must be soldered to the PCB 2. Maximize the ...

Page 14

Package Outline Drawing NOTE: The package drawing shown here may not be the latest version. To check the latest revision, please refer to the Intersil website at http://www.intersil.com/design/packages/index.asp All Intersil U.S. products are manufactured, assembled and tested utilizing ISO9000 quality ...

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