Status characteristics, Truth table, Key to abbreviations – Philips BUK218-50DC User Manual
Page 6
Philips Semiconductors
Product specification
TOPFET dual high side switch
BUK218-50DC
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
PARAMETER
CONDITIONS
MIN.
TYP.
MAX.
UNIT
V
SG
Status clamping voltage
I
S
= 100
µ
A
5.5
7
8.5
V
V
SG(LO)
Status low voltage
I
S
= 100
µ
A
-
0.7
0.9
V
I
S
= 250
µ
A
-
-
1.1
V
I
S
Status leakage current
V
SG
= 5 V
-
-
10
µ
A
T
mb
= 25˚C
-
0.1
1
µ
A
I
S(SAT)
Status saturation current
1
V
SG
= 5 V
5
10
15
mA
Application information
R
S
External pull-up resistor
-
47
-
k
Ω
TRUTH TABLE
ABNORMAL CONDITIONS
LOAD
INPUT
DETECTED
OUTPUT
STATUS
DESCRIPTION
SUPPLY
LOAD 1
LOAD 2
1
2
UV
OV OC SC OT OC SC OT
1
2
L
L
0
X
0
X
X
0
X
X
OFF OFF
H
both off & normal
L
L
0
X
1
X
X
X
X
X
OFF OFF
L
both off, one/both OC or short to V+
L
H
0
X
1
X
X
0
0
0
OFF
ON
L
one off & OC, other on & normal
H
L
0
0
0
0
0
0
0
0
ON
OFF
H
one on & normal, other off & normal
H
H
0
0
0
0
0
0
0
0
ON
ON
H
both on & normal
H
X
1
0
X
X
X
0
X
X
OFF OFF
H
supply undervoltage lockout
H
X
0
1
X
0
0
X
0
0
OFF OFF
H
supply overvoltage shutdown
H
X
0
0
0
1
X
X
X
X
OFF
X
L
one SC shutdown
H
L
0
0
0
1
X
0
0
X
OFF OFF
L
one SC shutdown, other off & normal
H
H
0
0
0
1
X
0
0
0
OFF
ON
L
one SC shutdown, other on & normal
H
X
0
0
0
0
1
X
X
X
OFF
X
L
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
logic low
UV undervoltage
H
logic high
OV overvoltage
X
don’t care
OC open circuit
0
condition not present
SC short circuit
1
condition present
OT 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.
October 2001
6
Rev 2.010