ILE4278 datasheet(8/18 Pages) IKSEMICON

Part #	ILE4278

Description	5-V Low-Drop Fixed Voltage Regulator

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Manufacturer	IKSEMICON [IK Semicon Co., Ltd]

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Upper timing threshold

V

DU

1.5

1.9

2.3

V

–

Lower reset timing

threshold

V

DRL

0.2

0.3

0.4

V

–

Delay time

t

rd

12

20

28

ms

C

D =47 nF

Reset reaction time

t

rr

0.4

1.0

2.0

←s

C

D =47 nF

Watchdog

Activating threshold

V

WADJ,th

1.28 1.35

1.45

V

Voltage at WADJ

Current ratio

I

Q/IWADJ

650

720

800

–

I

Q

® 10 mA

Slew rate

d

V

WI/dt

5–

–

V/

←s From 20% up to 80% V

Q

Watchdog low voltage

V

WOL

–0.2

0.4

V

R

ext >10 k

τ to V

Q

Watchdog high voltage

V

WOH

4.5

–

V

–

Watchdog pull-up

R

WO

20

30

46

k

τ

Internally connected to

V

Q

Charge current

I

D,wc

25

8

←A

V

D =1.0 V

Discharge current

I

D,wd

0.6

1.3

2.0

←A

V

D =1.0 V

Upper timing threshold

VDU

1.5

1.9

2.3

V

–

Lower watchdog timing

threshold

V

DWL

0.5

0.7

0.9

V

–

Watchdog output pulse

period

T

WD,p

42

60

80

ms

C

d =47 nF

Watchdog output low

time

t

WD,l

713

19

ms

V

Q > VRT

Watchdog trigger time

T

WI,tr

35

47

61

ms

C

d =47 nF

1) Measured when the output voltage V

Q has dropped 100 mV from the nominal value.

Electrical Characteristics (cont’d)

V

I =13.5 V;– 40

C ® T

j

® 125 C (unless otherwise specified)

Parameter

Symbol

Limit Values

Unit Test Condition

min. typ.

max.

Rev. 00

ILE 4278

8

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