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Philips Semiconductors
TOPFET dual high side switch
Product specification
BUK218-50DY
STATUS CHARACTERISTICS
The status output is an open drain transistor, and requires an external pull-up circuit to indicate a logic high.
Limits are at -40?C ≤ T mb ≤ 150?C and typicals at T mb = 25?C unless otherwise stated. Refer to TRUTH TABLE .
SYMBOL
V SG
V SG(LO)
I S
I S(SAT)
PARAMETER
Status clamping voltage
Status low voltage
Status leakage current
Status saturation current 1
CONDITIONS
I S = 100 μ A
I S = 100 μ A
I S = 250 μ A
V SG = 5 V
V SG = 5 V
T mb = 25?C
MIN.
5.5
-
-
-
-
5
TYP.
7
0.7
-
-
0.1
10
MAX.
8.5
0.9
1.1
10
1
15
UNIT
V
V
V
μ A
μ A
mA
Application information
R S
External pull-up resistor
-
47
-
k ?
TRUTH TABLE
ABNORMAL CONDITIONS
LOAD
INPUT
SUPPLY
DETECTED
LOAD 1
LOAD 2
OUTPUT
STATUS
DESCRIPTION
1
2
UV
OV OC SC OT OC SC OT
1
2
L
L
L
L
0
0
X
X
0
1
X
X
X
X
0
X
X
X
X
X
OFF OFF
OFF OFF
H
L
both off & normal
both off, one/both OC or short to V+
L
H
H
H
L
H
0
0
0
X
0
0
1
0
0
X
0
0
X
0
0
0
0
0
0
0
0
0
0
0
OFF
ON
ON
ON
OFF
ON
L
H
H
one off & OC, other on & normal
one on & normal, other off & normal
both on & normal
H
H
X
X
1
0
0
1
X
X
X
0
X
0
0
X
X
0
X
0
OFF OFF
OFF OFF
H
H
supply undervoltage lockout
supply overvoltage shutdown
H
X
0
0
0
1
X
X
X
X
OFF
X
L
one SC tripped
H
L
0
0
0
1
X
0
0
X
OFF OFF
L
one SC tripped, other off & normal
H
H
H
X
0
0
0
0
0
0
1
0
X
1
0
X
0
X
0
X
OFF
OFF
ON
X
L
L
one SC tripped, other on & normal
one OT shutdown
H
L
0
0
0
0
1
0
0
X
OFF OFF
L
one OT shutdown, other off & normal
H
H
0
0
0
0
1
0
0
0
OFF
ON
L
one OT shutdown, other on & normal
KEY TO ABBREVIATIONS
L
H
X
0
1
logic low
logic high
don’t care
condition not present
condition present
UV
OV
OC
SC
OT
undervoltage
overvoltage
open circuit
short circuit
overtemperature
1 For example with the pull-up resistor short circuited while the status transistor is conducting. This condition should be avoided in order to
prevent possible interference with normal operation of the device.
May 2001
6
Rev 1.400
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