LM1771SSD datasheet(1/18 Pages) NSC

tên linh kiện	LM1771SSD

Giải thích chi tiết về linh kiện	Low-Voltage Synchronous Buck Controller with Precision Enable and No External Compensation

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LM1771

Low-Voltage Synchronous Buck Controller with

Precision Enable and No External Compensation

General Description

The LM1771 is an efficient synchronous buck switching con-

troller with a precision enable requiring no external compen-

sation. The constant on-time control scheme provides a

simple design free of compensation components, allowing

minimal component count and board space. The precision

enable pin allows flexibility in sequencing multiple rails and

setting UVLO. The LM1771 also incorporates a unique input

feed-forward to maintain a constant frequency independent

of the input voltage. The LM1771 is optimized for a low

voltage input range of 2.8V to 5.5V and can provide an

adjustable output as low as 0.8V. Driving an external high

side PFET and low side NFET it can provide efficiencies as

high as 95%.

Three versions of the LM1771 are available depending on

the switching frequency desired for the application. Nominal

switching frequencies are in the range of 100kHz to

1000kHz.

Features

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Input voltage range of 2.8V to 5.5V

n

0.8V reference voltage

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Precision enable

n

No compensation required

n

Constant frequency across input range

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Low quiescent current of 400 µA

n

Internal soft-start

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Short circuit protection

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Tiny LLP-6 package and MSOP-8 package

Applications

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Simple To Design, High Efficiency Step Down Switching

Regulators

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FPGAs, DSPs, and ASIC Power Supplies

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Set-Top Boxes

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Cable Modems

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Printers

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Digital Video Recorders

n

Servers

n

Graphic Cards

Typical Application Circuit

20189001

June 2006

DS201890

www.national.com

Số phần tương tự - LM1771SSD

nhà sản xuất	tên linh kiện	bảng dữ liệu	Giải thích chi tiết về linh kiện
National Semiconductor ...	LM1771SSD	768Kb / 17P	Low-Voltage Synchronous Buck Controller with Precision Enable and No External Compensation
Texas Instruments	LM1771SSD	1Mb / 31P	Low-Voltage Synchronous Buck Controller
	LM1771SSD/NOPB	1Mb / 31P	Low-Voltage Synchronous Buck Controller
	LM1771SSD/NOPB	914Kb / 32P	LM1771 Low-Voltage Synchronous Buck Controller With Precision Enable and No External Compensation REVISED JANUARY 2016
	LM1771SSD/NOPB.A	914Kb / 32P	LM1771 Low-Voltage Synchronous Buck Controller With Precision Enable and No External Compensation REVISED JANUARY 2016

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Mô tả tương tự - LM1771SSD

nhà sản xuất	tên linh kiện	bảng dữ liệu	Giải thích chi tiết về linh kiện
National Semiconductor ...	LM1771_0608	768Kb / 17P	Low-Voltage Synchronous Buck Controller with Precision Enable and No External Compensation
Intersil Corporation	ISL95873	533Kb / 17P	Buck PWM Controller with Internal Compensation and External Reference Tracking December 10, 2012
Texas Instruments	LM2744	1Mb / 32P	Low Voltage N-Channel MOSFET Synchronous Buck Regulator Controller with External Reference
	LM1771	1Mb / 26P	LM1771 Low-Voltage Synchronous Buck Controller with Precision Enable and No External Compensation
	LM2744	1Mb / 33P	Low Voltage N-Channel MOSFET Synchronous Buck Regulator Controller with External Reference
Microchip Technology	MIC24051	1Mb / 34P	No External Compensation 11/07/16
Microchip Technology	MIC24053	544Kb / 32P	No External Compensation 11/07/16
Intersil Corporation	ISL95872	617Kb / 17P	Buck PWM Controller with Internal Compensation and External Reference Tracking January 26, 2012
Renesas Technology Corp	ISL95872	830Kb / 17P	Buck PWM Controller with Internal Compensation and External Reference Tracking
Renesas Technology Corp	ISL95873	835Kb / 17P	Buck PWM Controller with Internal Compensation and External Reference Tracking

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