EL7551CU-T13 INTERSIL [Intersil Corporation], EL7551CU-T13 Datasheet

EL7551CU-T13

Manufacturer Part Number

EL7551CU-T13

Description

Monolithic 1Amp DC:DC Step-down Regulator

Manufacturer

INTERSIL [Intersil Corporation]

Datasheet

1.EL7551CU-T13.pdf (9 pages)

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Monolithic 1Amp DC:DC Step-down

Regulator

3.8V. It is capable of delivering 1A continuous current at up

to 95% efficiency. The EL7551 operates at a constant

frequency pulse width modulation (PWM) mode, making

external synchronization possible. Patented on-chip

resistorless current sensing enables current mode control,

which provides cycle-by-cycle current limiting, over-current

protection, and excellent step load response. The EL7551 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 EL7551 ideal for desktop and portable

applications.

The EL7551 is specified for operation over the -40°C to

+85°C temperature range.

Pinout

(4.5V-5.5V)

39Ω

ceramic

10µF

0.1µF 270pF

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

area. The minimal external components and

The EL7551 is an integrated,

synchronous step-down regulator with

output voltage adjustable from 1.0V to

(16-PIN QSOP)

TOP VIEW

SGND

COSC

VDD

PGND

VIN

EL7551

PGND

VDRV

VREF

VHI

Data Sheet

0.1µF

1kΩ

0.1µF

10µH

2.37kΩ

1-888-INTERSIL or 321-724-7143

47µF

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

(3.3V,1A)

Features

• Integrated synchronous MOSFETs and current mode

• 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 1.2MHz

• Oscillator synchronization possible

• Internal soft start

• Over temperature protection

• Under voltage lockout

• 16-pin QSOP package

Applications

• DSP, CPU Core and IO Supplies

• Logic/Bus Supplies

• Portable Equipment

• DC:DC Converter Modules

• GTL + Bus Power Supply

Ordering Information

EL7551CU

EL7551CU-T7

EL7551CU-T13

PART NUMBER

controller

January 24, 2002

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

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

16-Pin QSOP

PACKAGE

TAPE & REEL

13”

7”

EL7551

PKG. NO.

MDP0040

FN7291

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