EL7551CU ELANTEC [Elantec Semiconductor], EL7551CU Datasheet

EL7551CU

Manufacturer Part Number

EL7551CU

Description

Monolithic 1 Amp DC:DC Step-down Regulator

Manufacturer

ELANTEC [Elantec Semiconductor]

Datasheets

1.EL7551CU.pdf (11 pages)

2.EL7551CU.pdf (11 pages)

3.EL7551CU.pdf (11 pages)

Available stocks

Company

Part Number

Manufacturer

Quantity

Price

Company:

Meier Automation Equipment Co., Limited

Part Number:

EL7551CU

Manufacturer:

INTERSIL

Quantity:

20 000

Current page: 1 of 11
Download datasheet (261Kb)

Note: All information contained in this data sheet has been carefully checked and is believed to be accurate as of the date of publication; however, this data sheet cannot be a “controlled document”. Current revisions, if any, to these

specifications are maintained at the factory and are available upon your request. We recommend checking the revision level before finalization of your design documentation.

Features

Applications

Ordering Information

• Integrated synchronous MOSFETs

• 1A continuous output current

• Up to 95% efficiency

• 4.5V to 5.5V input voltage

• Adjustable output from 1V to 3.8V

• Cycle-by-cycle current limit

• Precision reference

• ±0.5% load and line regulation

• Adjustable switching frequency to

• Oscillator synchronization

• Internal soft start

• Over temperature protection

• Under voltage lockout

• 16-pin QSOP package

• DSP, CPU Core and IO Supplies

• Logic/Bus Supplies

• Portable Equipment

• DC:DC Converter Modules

• GTL + Bus Power Supply

EL7551CU

and current mode controller

1MHz

possible

Part No

16-Pin QSOP

Package

Tape & Reel

MDP0040

Outline #

(4.5V-

EL7551C - Preliminary

Monolithic 1 Amp DC:DC Step-down Regulator

General Description

The EL7551C is an integrated, synchronous step-down regulator with

output voltage adjustable from 1.0V to 3.8V. It is capable of delivering

1A continuous current at up to 95% efficiency. The EL7551C operates

at a constant frequency pulse width modulation (PWM) mode, making

external synchronization possible. Patented on-chip resistorless cur-

rent sensing enables current mode control, which provides cycle-by-

cycle current limiting, over-current protection, and excellent step load

response. The EL7551C is available in a fused-lead 16-pin QSOP

package. With proper external components, the whole converter fits

into a less than 0.4 in

small size make this EL7551C ideal for desktop and portable

applications.

The EL7551C is specified for operation over the -40°C to +85°C tem-

perature range.

5.5V)

Typical Application Diagram

ceramic

10µF

0.1µF 270pF

Manufactured under U.S. Patent No. 57,323,974

area. The minimal external components and

SGND

COSC

VDD

PGND

VIN

EL7551C

PGND

VDRV

PGND

VREF

VHI

0.1µF

2.37k

10µH

47µF

(3.3V,

1A)

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