Datasheet > NCV8851B

NCV8851B

更新时间： 2024-10-26 12:19:55

品牌	Logo	应用领域
安森美 - ONSEMI		控制器
页数	文件大小	规格书
18页	222K
描述
Automotive Grade Synchronous Buck Controller

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NCV8851B 数据手册

NCV8851B

Automotive Grade

Synchronous Buck

Controller

The NCV8851B is an adjustable output, synchronous buck

controller, which drives dual N−channel MOSFETs, ideal for high

power applications. Average current mode control is employed for

very fast transient response and tight regulation over wide input

voltage and output load ranges. The IC incorporates an internal fixed

6.0 V low−dropout linear regulator (LDO), which supplies charge to

the switch mode power supply’s (SMPS) bottom gate driver, limiting

the power lost to excess gate drive. The IC is designed for operation

over a wide input voltage range (4.5 V to 40 V) and is capable of 10 to

1 voltage conversion at 500 kHz.

http://onsemi.com

TSSOP−20

SUFFIX DB

CASE 948E

Additional controller features include undervoltage lockout,

internal soft start, low quiescent current sleep mode, programmable

frequency, SYNC function, average current limiting, cycle−by−cycle

overcurrent protection and thermal shutdown.

MARKING DIAGRAM

Features

NCV

8851B

ALYWG

• Average Current Mode Control

• 0.8 V 2% Reference Voltage

• Wide Input Voltage Range of 4.5 V to 40 V

• Operates through Load Dump Conditions

• 6.0 V Low−dropout Linear Regulator (LDO)

• Input UVLO (Undervoltage Lockout)

• Internal Soft−start

NCV8851B = Specific Device Code

= Assembly Location

= Wafer Lot

= Year

= Work Week

= Pb−Free Package

• 1.0 mA Maximum Quiescent Current in Sleep Mode

• Adaptive Non−overlap Circuitry

(Note: Microdot may be in either location)

• 150 ns Minimum High−side Gate Off−time

• Programmable Fixed Frequency – 170 kHz to 500 kHz

• External Clock Synchronization up to 600 kHz

• Average Current Limiting (ACL)

ORDERING INFORMATION

†

Device

Package

Shipping

NCV8851BDBR2G TSSOP−20 2500/Tape & Reel

(Pb−Free)

• Cycle−by−Cycle Overcurrent Protection (OCP)

• Thermal Shutdown (TSD)

†For information on tape and reel specifications,

including part orientation and tape sizes, please

refer to our Tape and Reel Packaging Specification

Brochure, BRD8011/D.

• This is a Pb−Free Device

Applications

• Automotive Systems Requiring High Current

• Pre−regulated Supply for Low−voltage SMPSs and LDOs

Publication Order Number:

June, 2010 − Rev. 1

NCV8851B/D

12 3 4 5 6 7...18

中文翻译

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与NCV8851B相关器件

型号	品牌	获取价格	描述	数据表
NCV8851BDBR2G	ONSEMI	获取价格	Automotive Grade Synchronous Buck Controller
NCV8851DBG	ONSEMI	获取价格	Automotive Grade Synchronous Buck Controller
NCV8851DBR2G	ONSEMI	获取价格	Automotive Grade Synchronous Buck Controller
NCV8851FDBR2G	ONSEMI	获取价格	IC SWITCHING CONTROLLER, Switching Regulator or Controller
NCV8852	ONSEMI	获取价格	Automotive Grade Non-Synchronous Buck Controller
NCV8852_15	ONSEMI	获取价格	Automotive Grade Non-Synchronous Buck Controller
NCV8852_16	ONSEMI	获取价格	Automotive Grade Non-Synchronous Buck Controller
NCV885201D1R2G	ONSEMI	获取价格	Automotive Grade Non-Synchronous Buck Controller
NCV8852DR2G	ONSEMI	获取价格	P-Channel, 100% Duty Cycle, Non-Synchronous Buck Controller, Automotive Grade, SOIC-8 Narr
NCV8853	ONSEMI	获取价格	Automotive Grade Non-Synchronous Buck Controller

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