EL7556DCMZ Intersil, EL7556DCMZ Datasheet

EL7556DCMZ

Manufacturer Part Number

EL7556DCMZ

Description

IC REG 6A DC/DC SW SD 28SOIC

Manufacturer

Intersil

Type

Step-Down (Buck)r

Datasheet

1.EL7556DCMZ.pdf (11 pages)

Specifications of EL7556DCMZ

Internal Switch(s)

Yes

Synchronous Rectifier

Yes

Number Of Outputs

Voltage - Output

1 ~ 3.8 V

Current - Output

Frequency - Switching

1MHz

Voltage - Input

Operating Temperature

-40°C ~ 85°C

Mounting Type

Surface Mount

Package / Case

28-SOIC (7.5mm Width)

Power - Output

21W

Lead Free Status / RoHS Status

Lead free / RoHS Compliant

Available stocks

Company

Part Number

Manufacturer

Quantity

Price

Company:

BOSTOCK HK LIMITED

Part Number:

EL7556DCMZ

Quantity:

579

Current page: 1 of 11
Download datasheet (176Kb)

Integrated Adjustable 6 Amp

Synchronous Switcher

The EL7556D is an adjustable synchronous DC:DC

switching regulator optimized for a 5V input and 1.0V-3.8V

output. By combining integrated NMOS power FETS with a

fused-lead package, the EL7556D can supply up to 6A

continuous output current without the use of external power

devices or discrete 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 EL7556D

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 3.5V 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 EL7556D is available in a 28-pin SO package and is

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

temperature range.

Ordering Information

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.

EL7556DCM

EL7556DCM-T13

EL7556DCMZ

(See Note)

EL7556DCMZ-T13

(See Note)

NUMBER

PART

PACKAGE

28-Pin SO

(Pb-free)

Data Sheet

TAPE &

REEL

13”

PKG. DWG. #

MDP0027

1-888-INTERSIL or 1-888-468-3774

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

Features

• Improved temperature and voltage ranges

• 6A 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

• Pb-free plus anneal available (RoHS compliant)

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

August 1, 2005

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

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

EL7556D

FN7339.1

Related parts for EL7556DCMZ

EL7556DCMZ Summary of contents

Page 1

... EL7556DCM-T13 28-Pin SO 13” EL7556DCMZ 28-Pin SO (See Note) (Pb-free) EL7556DCMZ-T13 28-Pin SO 13” (See Note) (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 ...

Page 2

Pinout EL7556D (28-PIN SO) TOP VIEW FB1 1 28 CREF 2 27 CSLOPE 3 26 COSC 4 25 VDD 5 24 VIN 6 23 VSSP 7 22 VIN 8 21 VSSP 9 20 VSSP 10 19 VSSP 11 18 VSSP ...

Page 3

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

Page 4

Electrical Specifications DD PARAMETER DESCRIPTION V Reference Voltage Tempco REFTC V Reference Load Regulation REFLOAD CONTROLLER - DOUBLER VC2V Voltage Doubler Output CONTROLLER - OSCILLATOR F Oscillator Ramp Amplitude RAMP I Oscillator Charge Current OSC CHG I ...

Page 5

Typical Performance Curves Efficiency LOAD OUT V =V =5.0V (±10 = =5. =25° 0.5 1.5 2.5 3.5 I OUT ...

Page 6

Typical Performance Curves OUT SLOPE (V =5.0V, I =0.5A) IN LOAD 1.5 T =25°C A 1.0 0.5 V =1V 0.0 OUT -0.5 -1.0 V =3.5V OUT -1.5 -2.0 -2.5 -3 100 C SLOPE F vs ...

Page 7

Typical Performance Curves Power On Reset 40 T =25°C A OUTEN 2.5 3.0 3.5 V (V) DD Θ Area Board with no Components 33 31 Board with 29 ...

Page 8

Pin Descriptions I = Input Output Supply PIN NUMBER PIN NAME PIN TYPE 1 FB1 I 2 CREF I 3 CSLOPE I 4 COSC I 5 VDD S 6 VIN S 7 VSSP S 8 VIN ...

Page 9

Block Diagram FB1, Pin 1 FB2, Pin 28 VCCDET, Pin 13 CSLOPE, Pin 3 CREF, Pin 27 1.26V OUTEN, Pin 14 4V UVLO VDD - + COSC, Pin Applications Information Circuit Description General The EL7556D is a ...

Page 10

The heart of the controller is a triple-input direct summing comparator which sums voltage feedback, current feedback and slope ...

Page 11

... 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; nor for any infringements of patents or other rights of third parties which may result from its use ...

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