Datasheet > NB677

NB677

更新时间： 2024-12-01 17:01:43

品牌	Logo	应用领域
芯源 - MPS		调节器
页数	文件大小	规格书
19页	729K
描述
8A, 24V高效全集成恒定导通时间（COT）控制模式同步降压变换器，具有快速瞬态响应、26mΩ/12mΩ低导通电阻、3.3V 低压差（LDO）调节器

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NB677 数据手册

NB677

24V, 3.3VOUT, High Current

Synchronous Buck Converter With LDO

The Future of Analog IC Technology

DESCRIPTION

FEATURES

The NB677 is a fully integrated high frequency

synchronous rectified step-down switch mode

converter with 3.3V fixed output voltage. It offers

very compact solution to achieve 8A continuous

output current and 10A peak output current over

a wide input supply range with excellent load and

line regulation. The NB677 operates at high

efficiency over a wide output current load range.

Constant-On-Time (COT) control mode provides

fast transient response and eases loop

stabilization.

•

Wide 5.5V to 24V Operating Input Range

3.3V Fixed Output Voltage

Built-in 3.3V, 100mA LDO with Switches

8A Continuous Output Current

10A Peak Output Current

300kHZ CLK for External Charge Pump

Low R_DS(ON) Internal Power MOSFETs

Proprietary Switching Loss Reduction

Technique

Internal Soft Start

Output Discharge

500kHZ Switching Frequency

OCP, OVP, UVP Protection and Thermal

Shutdown

•

Under voltage lockout is internally set as 4.65 V.

An open drain power good signal indicates the

output is within its nominal voltage range.

•

Latch Off Reset via EN or Power Cycle

NB677 also provides a 3.3V LDO, which can be

used to power the external peripheries, such as

the keyboard controller in the laptop computer. A

300kHz CLK is also available; its output can be

used to drive an external charge pump,

generating gate drive voltage for the load

switches without reducing the main converter’s

efficiency.

APPLICATIONS

•

Laptop Computer

Tablet PC

Networking Systems

Personal Video Recorders

Flat Panel Television and Monitors

Distributed Power Systems

Full protection features include OCP, OVP, UVP

and thermal shut down.

All MPS parts are lead-free and adhere to the RoHS directive. For MPS green

status, please visit MPS website under Products, Quality Assurance page.

The converter requires minimum number of

external components and is available in QFN16

(3mmx3mm) package.

“MPS” and “The Future of Analog IC Technology” are Registered Trademarks

of Monolithic Power Systems, Inc.

TYPICAL APPLICATION

100nF

VCC

100nF

15V

100nF

3.3O

100nF

V_IN

5.5-22V

220nF

V_OUT

3.3V/8A

CLK

BST

VIN

1.5µH

22µF

499kO

NB677

22µF*3

VOUT

GND

ENLDO

PGND

AGND

LDO

VCC

100kO

GND

4.7µF

1µF

NB677 Rev. 1.01

8/27/2014

www.MonolithicPower.com

MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited.

12 3 4 5 6 7...19

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与NB677相关器件

型号	品牌	获取价格	描述	数据表
NB680	MPS	获取价格	4.8-26V 宽输入电压、低 Iq、大电流、固定 3.3V 输出-8A，带 100mA
NB680A	MPS	获取价格	5.5-26V宽输入电压、低静态电流、大电流、固定 3.36V-8A 同步降压转换器，搭载
NB681	MPS	获取价格	4.5-26V宽输入电压、6A、低静态电流、大电流同步降压变换器，搭载 2 位 VID
NB681A	MPS	获取价格	4.5-26V宽输入电压、6.5A、低静态电流、大电流同步降压变换器，搭载 2 位 VID
NB682	MPS	获取价格	4.5-26V宽输入电压、3A、宽输出、同步降压变换器，搭载 2 位 VID
NB685	MPS	获取价格	26 V，12 A，低静态电流，大电流同步降压变换器带+/- 1 A LDO 和缓冲参
NB685A	MPS	获取价格	4.5-26V宽输入电压、12A、低静态电流、大电流同步降压变换器，搭载 +/-1A LD
NB686	MPS	获取价格	4.5-26V宽输入电压、8A、低静态电流、大电流同步降压变换器，搭载 +/-1A LDO
NB6FAAH0-0-B	ETC	获取价格	N e u t r i k Â® P a r t N u m b e r G u i d
NB6FAH0-0-B	ETC	获取价格	N e u t r i k Â® P a r t N u m b e r G u i d

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