Datasheet > NCV8881

NCV8881

更新时间： 2022-02-26 13:23:26

品牌	Logo	应用领域
安森美 - ONSEMI		/
页数	文件大小	规格书
33页	327K
描述
Automotive Buck Regulator with Watchdog

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NCV8881 数据手册

NCV8881

1.5A Automotive Buck

Regulator with Watchdog

The NCV8881 consists of a Buck switching regulator (SMPS) with

a combination SMPS output undervoltage monitor and CPU watchdog

circuit. In addition, two fixed−voltage low dropout regulator outputs

are provided, and share an LDO output voltage status output. Once

enabled, regulator operation continues until the Watchdog signal is no

longer present. The NCV8881 is intended for Automotive,

battery−connected applications that must withstand a 40 V load dump.

The switching regulator is capable of converting the typical 9 V to

19 V automotive input voltage range to outputs from 3.3 V to 8 V at a

constant switching frequency, which can be resistor programmed or

synchronized to an external clock signal. Enable input threshold and

hysteresis are programmable, with the enable input state replicated at

an open drain Ignition Buffer output. The regulators are protected by

current limiting, input overvoltage and overtemperature shutdown, as

well as SMPS short circuit shutdown.

http://onsemi.com

MARKING

DIAGRAMS

SO−16W EP

PW SUFFIX

CASE 751AG

NCV8881

AWLYYWWG

= Assembly Location

= Wafer Lot

= Year

= Work Week

= Pb−Free Package

Features

• 1.5 A Switching Regulator (internal power switch)

• 100 mA, 5 V LDO Output

• 40 mA, 8.5 V LDO Output

(Note: Microdot may be in either location)

• Operating Range 5 V to 19 V

• Programmable SMPS Frequency

• SMPS can be Synchronized to an External Clock

• Programmable SMPS Output Voltage Down to 0.8 V

• $2% Reference Voltage Tolerance

PIN CONNECTIONS

IGNBUF

WDI

RDLY

RESB

5P0

LDOMON

8P5

VIN

• Internal SMPS Soft−Start

• Voltage−mode SMPS Control

• SMPS Cycle−by−Cycle Current Limit and Short−Circuit Protection

• Internal Bootstrap Diode

SYNC

ROSC

GND

BST

COMP

• Logic level Enable Input

• Enable Input Hysteresis Programmable by External Resistor Divider

• Enable Input State is Replicated at an Open Drain Output

• CPU Watchdog with Resistor Programmable Delays

• Watchdog Reset Output also Indicates SMPS Output Out of Regulation

• Battery Input Withstands Load Dump to 40 V

• Low Standby Current

(Top View)

ORDERING INFORMATION

See detailed ordering and shipping information in the package

dimensions section on page 32 of this data sheet.

• Thermal Shutdown (TSD)

• NCV Prefix for Automotive and Other Applications Requiring Site

and Change Controls

• These are Pb−Free Devices

Applications

• Audio

• Infotainment

• Safety – Vision Systems

• Instrumentation

Publication Order Number:

January, 2011 − Rev. 1

NCV8881/D

12 3 4 5 6 7...33

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