Philips Semiconductors

Product specification

TOPFET high side switch

BUK224-50Y

SMD version of BUK223-50Y

UNDERVOLTAGE & OVERVOLTAGE CHARACTERISTICS

Limits are at -40˚C

≤ T

mb

≤ 150˚C and typicals at T

SYMBOL

PARAMETER

CONDITIONS

MIN.

TYP.

MAX.

UNIT

Undervoltage

V

BG(UV)

Low supply threshold voltage

1

2

4.2

5.5

V

∆V

BG(UV)

Hysteresis

-

0.5

-

V

Overvoltage

V

BG(OV)

High supply threshold voltage

2

40

45

50

V

∆V

BG(OV)

Hysteresis

-

1

-

V

TRUTH TABLE

ABNORMAL CONDITIONS

DETECTED

LOAD

INPUT

SUPPLY

LOAD

OUTPUT

STATUS

DESCRIPTION

UV

OV

LC

SC

OT

L

X

X

X

X

X

OFF

H

off

H

0

0

0

0

0

ON

H

on & normal

H

0

0

1

0

0

ON

L

on & low current detect

H

1

0

X

X

X

OFF

H

supply undervoltage lockout

H

0

1

X

0

0

OFF

H

supply overvoltage shutdown

H

0

0

0

1

X

OFF

L

SC tripped

H

0

0

0

0

1

OFF

L

OT shutdown

3

KEY TO ABBREVIATIONS

L

logic low

UV undervoltage

H

logic high

OV overvoltage

X

don’t care

LC

low current or open circuit load

0

condition not present

SC short circuit

1

condition present

OT overtemperature

1 Undervoltage sensor causes the device to switch off and reset.

2 Overvoltage sensor causes the device to switch off to protect its load.

PROTECTION CHARACTERISTICS

.

November 2002

5

Rev 2.000