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NCV8851-1DBR2G

Automotive Grade Synchronous Buck Controller

ON Semiconductor 

NCV8851-1

Automotive Grade

Synchronous Buck

Controller

The NCV8851−1 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.

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.

Features

• 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

• 1.0 mA Maximum Quiescent Current in Sleep Mode

• Adaptive Non−overlap Circuitry

• 180 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)

• Cycle−by−Cycle Overcurrent Protection (OCP)

• Thermal Shutdown (TSD)

• This is a Pb−Free Device

Applications

• Automotive Systems Requiring High Current

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

www.onsemi.com

TSSOP−20

SUFFIX DB

CASE 948E

MARKING DIAGRAM

V88

51−1

ALYWG

G

V8851−1 = Specific Device Code

A

= Assembly Location

L

= Wafer Lot

Y

= Year

W

= Work Week

G

= Pb−Free Package

(Note: Microdot may be in either location)

ORDERING INFORMATION

Device

Package

NCV8851−1DBR2G TSSOP−20

(Pb−Free)

Shipping†

2500 / Tape &

Reel

†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.

© Semiconductor Components Industries, LLC, 2014

1

November, 2014 − Rev. 2

Publication Order Number:

NCV8851−1/D

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