Datasheet > EL7551C

EL7551C

更新时间： 2024-09-14 22:50:59

品牌	Logo	应用领域
ELANTEC		稳压器
页数	文件大小	规格书
11页	262K
描述
Monolithic 1 Amp DC:DC Step-down Regulator

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数据手册

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EL7551C 数据手册

EL7551C - Preliminary

Monolithic 1 Amp DC:DC Step-down Regulator

Features

General Description

• Integrated synchronous MOSFETs

and current mode controller

• 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

1MHz

• Oscillator synchronization

possible

• Internal soft start

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 in²area. The minimal external components and

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.

• Over temperature protection

• Under voltage lockout

• 16-pin QSOP package

Applications

Typical Application Diagram

• DSP, CPU Core and IO Supplies

• Logic/Bus Supplies

• Portable Equipment

• DC:DC Converter Modules

• GTL + Bus Power Supply

SGND

COSC

VDD

PGND

VIN

PGND 16

VREF 15

FB 14

0.1µF 270pF

Ordering Information

0.1µF

Part No

Package

Tape & Reel

Outline #

39W

2.37k

EL7551CU

16-Pin QSOP

MDP0040

1kW

VDRV 13

LX 12

10µH

(3.3V,

1A)

10µF

ceramic

47µF

LX 11

0.1µF

VIN

VHI 10

(4.5V-

5.5V)

PGND 9

EL7551C

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

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.

12 3 4 5 6 7...11

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与EL7551C相关器件

型号	品牌	获取价格	描述	数据表
EL7551CU	ELANTEC	获取价格	Monolithic 1 Amp DC:DC Step-down Regulator
EL7551CU	INTERSIL	获取价格	Monolithic 1Amp DC:DC Step-down Regulator
EL7551CU-T13	INTERSIL	获取价格	Monolithic 1Amp DC:DC Step-down Regulator
EL7551CU-T7	INTERSIL	获取价格	Monolithic 1Amp DC:DC Step-down Regulator
EL7551CUZ	INTERSIL	获取价格	Monolithic 1Amp DC:DC Step-down Regulator
EL7551CUZ-T13	INTERSIL	获取价格	Monolithic 1Amp DC:DC Step-down Regulator
EL7551CUZ-T7	INTERSIL	获取价格	Monolithic 1Amp DC:DC Step-down Regulator
EL7554	INTERSIL	获取价格	Monolithic 4 Amp DC-DC Step-Down Regulator
EL7554_06	INTERSIL	获取价格	Monolithic 4 Amp DC-DC Step-Down Regulator
EL7554IRE	INTERSIL	获取价格	Monolithic 4 Amp DC-DC Step-Down Regulator

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