Datasheet > NB680

NB680

更新时间： 2024-12-01 17:01:15

品牌	Logo	应用领域
芯源 - MPS		转换器
页数	文件大小	规格书
18页	1060K
描述
4.8-26V 宽输入电压、低 Iq、大电流、固定 3.3V 输出-8A，带 100mA LDO 的同步 Buck 降压转换器

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NB680 数据手册

NB680

28V, Low Iq, High Current, Fixed 3.3V-8A

Synchronous Buck Converter

with 100 mA LDO

DESCRIPTION

FEATURES

The NB680 is a fully integrated, high-frequency,

synchronous, rectified, step-down, switch-mode

converter with a fixed 3.3 V Vout. It offers a

very compact solution to achieve an 8 A

continuous output current and a 10 A peak

output current over a wide input supply range

with excellent load and line regulation.



Wide 4.8 V to 28 V Operating Input Range

Fixed 3.3 V Vout

Ultrasonic Mode with Fs over 25 kHz

100 μA Low Quiescent Current

8 A Continous Output Current

10 A Peak Output Current

Adaptive COT for Fast Transient

DC Auto-Tune Loop

Stable with POSCAP and Ceramic Output

Capacitors

250 kHz CLK for External Charge Pump

Built-In 3.3 V, 100 mA LDO with Switch

Over

1% Reference Voltage

Internal Soft Start

The NB680 operates at high efficiency over a

wide output current load range based on MPS

proprietary switching loss reduction technology

and internal low Ron power MOSFETs.



Adaptive constant-on-time (COT) control mode

provides fast transient response and eases loop

stabilization. The DC auto-tune loop provides

good load and line regulation.



Output Discharge

NB680 provides a fixed 3.3 V LDO, which can

power the external peripheries, such as the

keyboard controller in the laptop.

700 kHZ Switching Frequency

OCL, OVP, UVP, and Thermal Shutdown.

Latch-Off Reset via EN or Power Cycle.

QFN 2mm x 3mm Package

Also, a 250 kHz CLK is available; its output can

drive an external charge pump, generating gate

drive voltage for the load switches without

reducing the main converter’s efficiency.

APPLICATIONS



Laptop Computers

Tablet PCs

Full protection features include OC limit, OVP,

UVP, and thermal shutdown.

Networking Systems

Servers

Personal Video Recorders

Flat Panel Television and Monitors

Distributed Power Systems

NB680 requires a minimum number of external

components and is available in

2mm x 3mm package.

QFN

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

MPS green status, please visit the MPS website under Quality Assurance.

“MPS” and “The Future of Analog IC Technology” are registered trademarks of

Monolithic Power Systems, Inc.

TYPICAL APPLICATION

100 nF

12 V

5 V

100 nF

3.3 Ω

V_IN

4.8 V-24

220 nF

V_OUT

BST

CLK

VIN

1.5 μH

3.3 V/8 A

22 μF

ENCLK

NB680

22 μF * 3

VOUT

GND

PGND

AGND

3.3 V/

LDO

100 mA

VCC

100 kΩ

AGND

GND

4.7 μF

1 μF

NB680 Rev. 1.03

7/27/2017

www.MonolithicPower.com

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

12 3 4 5 6 7...18

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与NB680相关器件

型号	品牌	获取价格	描述	数据表
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
NB6FBH0-0-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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