NCV4949A datasheet(1/9 Pages) ONSEMI

Part #	NCV4949A

Description	100 mA, 5.0 V, Low Dropout Voltage Regulator with Reset and Sense

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Manufacturer	ONSEMI [ON Semiconductor]

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 Semiconductor Components Industries, LLC, 2010

June, 2010 -- Rev. 0

1

Publication Order Number:

NCV4949A/D

NCV4949A

100 mA, 5.0 V, Low Dropout

Voltage Regulator with

Reset and Sense

The NCV4949A is a monolithic integrated 5.0 V voltage regulator

with a very low dropout and additional functions such as reset and an

uncommitted voltage sense comparator.

It is designed for supplying microcontroller/microprocessor

controlled systems particularly in automotive applications. The

NCV4949A has improved reset behavior for lower input and output

voltage levels.

Features

 Operating DC Supply Voltage Range 5.0 V to 28 V

 Transient Supply Voltage Up to 40 V

 Extremely Low Quiescent Current in Standby Mode

 High Precision Output Voltage 5.0 V 1%

 Output Current Capability Up to 100 mA

 Very Low Dropout Voltage Less Than 0.4 V

 Reset Circuit Sensing The Output Voltage

 Programmable Reset Pulse Delay

 Voltage Sense Comparator

 Thermal Shutdown and Short Circuit Protections

 NCV Prefix for Automotive and Other Applications Requiring Site

and Change Control

 These are Pb--Free Devices

Regulator

1.23 Vref

2.0 V

2.0 mA

Reset

1.23 V

Sense

GND

Sense

Output

(So)

Reset

Sense

Input

(Si)

Supply

Voltage (VCC)

VZ

Output

Voltage (Vout)

CT

38

4

6

7

5

2

1

Vs

+

--

+

--

Preregulator

6.0 V

Figure 1. Representative Block Diagram

http://onsemi.com

(Top View)

PIN CONNECTIONS

1

2

3

4

8

7

6

5

VZ

CT

GND

Si

VCC

Reset

So

Vout

SOIC--8

D SUFFIX

CASE 751

1

8

V4949A

ALYWD

G

1

8

Seedetailedorderingandshippinginformationinthepackage

dimensions section on page 8 of this data sheet.

ORDERING INFORMATION

A

= Assembly Location

L

= Wafer Lot

Y

= Year

W

= Work Week

G

=Pb--Free Device

MARKING DIAGRAM

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