NCV8508DW50R2 datasheet(4/12 Pages) ONSEMI

Part #	NCV8508DW50R2

Description	5.0 V, 250 mA LDO with Watchdog and RESET

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NCV8508

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PACKAGE PIN DESCRIPTION

PACKAGE PIN #

D2PAK−7

SO−16L

PIN SYMBOL

FUNCTION

1

8

VOUT

Regulated output voltage

± 3.0%.

2

9

VIN

Supply Voltage to the IC.

3

11

WDI

CMOS compatible input lead. The Watchdog function monitors the falling

edge of the incoming signal.

4

4, 5, 12, 13

GND

Ground connection.

5

14

Wakeup

CMOS compatible output consisting of a continuously generated signal used

to “wake up” the microprocessor from sleep mode.

6

15

RESET

CMOS compatible output lead RESET goes low whenever VOUT drops by

more than 7.0% from nominal, or during the absence of a correct Watchdog

signal.

7

16

Delay

Buffered bandgap voltage used to create timing current for RESET and

Wakeup from RDelay.

−

1−3, 6, 10

NC

No Connection.

−

7

Sense

Kelvin connection which allows remote sensing of the output voltage for

improved regulation. Connect to VOUT if remote sensing is not required.

+

−

Wakeup

Circuit

Timing

Circuit

Falling

Edge

Detect

Watchdog

Circuit

Thermal

Shutdown

Current

Limit

Charge

Pump

Bandgap

Reference

VIN

RESET

VOUT

Wakeup

WDI

Delay

Figure 2. Block Diagram

−

+

1.25 V

11 V

Internally

connected

on 7 lead

D2PAK

Sense

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