EL7558BCM Intersil Corporation, EL7558BCM Datasheet

EL7558BCM

Manufacturer Part Number

EL7558BCM

Description

Manufacturer

Intersil Corporation

Datasheet

1.EL7558BCM.pdf (11 pages)

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Price

Company:

Meier Automation Equipment Co., Limited

Part Number:

EL7558BCM

Manufacturer:

Quantity:

20 000

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Integrated Adjustable 8 Amp

Synchronous Switcher

1.0V-3.8V output. By combining integrated NMOS power

FETS with a HSOP package the EL7558B can supply up to

8A continuous output current without the use of external

power devices or externally attached heat sinks, thereby

minimizing design effort and overall system cost.

On-chip resistorless current sensing is used to achieve

stable, highly efficient, current-mode control. The EL7558B

also incorporates the VCC2DET function to directly interface

with the Intel P54 and P55 microprocessors. Depending on

the state of VCC2DET, the output voltage is internally preset

to 3.50V or a user-adjustable voltage using two external

resistors. In both internal and external feedback modes the

active-high PWRGD output indicates when the regulator

output is within ±10% of the programmed voltage. An on-

board sensor monitors die temperature (OT) for over-

temperature conditions and can be connected directly to

OUTEN to provide automatic thermal shutdown. Adjustable

oscillator frequency and slope compensation allow added

flexibility in overall system design.

The EL7558B is available in the 28-pin HSOP package and

is specified for operation over the -40°C to +85°C

temperature range.

Pinout

Manufactured under U.S. Patents No. 5,723,974 and No. 5,793,126

C12 = 1µF

C3, C4, C5, C6, C7 C8 - ceramic

C5, C11 - ceramic or tantalum

C9 - Sprague 293D337X96R3 2X330µF

C10 - Sprague 293D337X96R3 3X330µF

L1 - Pulse Engineering, PE-53681

D1 - D4: BAT54S fast diode

D4 Required for EL7558ACM only

660µF

5.1:

1µF

0.1µF

Connect to VSSP for

external feedback

100:

C12

1µF

220pF

The EL7558B is an adjustable

synchronous DC:DC switching

regulator optimized for a 5V input and

330pF

(28-PIN HSOP)

TOP VIEW

EL7558B

CREF

COSC

VDD

VIN

VSSP

VIN

VSSP

VCC2DET

OUTEN

FB1

CSLOPE

150:

PWRGD

VSSP

TEST

C2V

VSS

FB2

VHI

Data Sheet

20:

0.1µF

C 6

2.5µH

39.2:

1µF

C 5

C10

1mF

C11

0.22µF

1-888-INTERSIL or 321-724-7143

(Optional)

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

D4*

OUT

Features

• EL7558/EL7558A pin-compatible

• Improved temperature and voltage ranges

• 8A continuous load current

• Precision internal 1% reference

• 1.0V to 3.8V output voltage

• Internal power MOSFETs

• >90% efficiency

• Synchronous switching

• Adjustable slope compensation

• Over-temperature indicator

• Pulse-by-pulse current limiting

• Operates up to 1MHz

• 1.5% typical output accuracy

• Adjustable oscillator with sync

• Remote enable/disable

• Intel P54- and P55-compatible

• VCC2DET interface

• Internal soft-start

Applications

• PC motherboards

• Local high power CPU supplies

• 5V to 1.0V DC:DC conversion

• Portable electronics/instruments

• P54 and P55 regulators

• GTL+ Bus power supply

Ordering Information

EL7558BCM

EL7558BCM-T13

PART NUMBER

All other trademarks mentioned are the property of their respective owners.

April 27, 2001

Intersil (and design) is a registered trademark of Intersil Americas Inc.

28-Pin HSOP

PACKAGE

TAPE &

REEL

13”

EL7558B

PKG. NO.

MDP0042

FN7293

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EL7558BCM Summary of contents

Page 1

... OUT EL7558BCM C10 1mF EL7558BCM-T13 CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures. 1-888-INTERSIL or 321-724-7143 Copyright © Intersil Americas Inc. 2003. All Rights Reserved. Elantec is a registered trademark of Elantec Semiconductor, Inc. All other trademarks mentioned are the property of their respective owners. ...

Page 2

Absolute Maximum Ratings (T = 25°C) A Storage Temperature Range . . . . . . . . . . . . . . . . . .-65°C to +150°C Supply ( ...

Page 3

Electrical Specifications PARAMETER DESCRIPTION CONTROLLER - REFERENCE V Reference Accuracy REF V Reference Voltage Tempco REFTC V Reference Load Regulation REFLOAD CONTROLLER - DOUBLER VC2V Voltage Doubler Output CONTROLLER - OSCILLATOR F Oscillator Ramp Amplitude RAMP ...

Page 4

Typical Performance Curves Efficiency =3.5V) LOAD OUT = =5. 0.5 1.5 2.5 3.5 4.5 I (A) OUT Line Regulation (C =150pF) SLOPE 3.54 T =25°C ...

Page 5

Typical Performance Curves Line Regulation vs C SLOPE V =V =5.0V ±10 0.8 0.7 0.6 0.5 I =0.5A OUT 0.4 0.3 I =6A OUT 0.2 0.1 0 100 C SLOPE OUT SLOPE (V ...

Page 6

Typical Performance Curves OSC 60 T =25°C A OUTEN Discontinuous Mode 0 F OSC OSC 50 T =25°C A ...

Page 7

Typical Performance Curves Pin Descriptions I = INPUT OUTPUT SUPPLY PIN PIN NUMBER PIN NAME TYPE 1 FB1 I 2 CREF I 3 CSLOPE I 4 COSC I 5 VDD S 6 VIN S 7 VSSP ...

Page 8

Pin Descriptions (Continued INPUT OUTPUT SUPPLY PIN PIN NUMBER PIN NAME TYPE VHI I 25 VSS S 26 C2V ...

Page 9

Applications Information Circuit Description General The EL7558B is a fixed frequency, current mode controlled DC:DC converter with integrated N-channel power MOSFETS and a high precision reference. The device incorporates all of the active circuitry required to implement a cost effective, ...

Page 10

FB1 and allows the output to be programmed from 1.0 to 3.8V. In general: § ¨ ------ - OUT © However, due to the relatively low open loop gain ...

Page 11

... Intersil Corporation’s quality certifications can be viewed at www.intersil.com/design/quality Intersil products are sold by description only. Intersil Corporation reserves the right to make changes in circuit design, software and/or specifications at any time without notice. Accordingly, the reader is cautioned to verify that data sheets are current before placing orders. Information furnished by Intersil is believed to be accurate and reliable. However, no responsibility is assumed by Intersil or its subsidiaries for its use ...

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