Philips Semiconductors Product specification
Logic level TOPFET BUK136-50L
SMD version of BUK125-50L
PROTECTION SUPPLY CHARACTERISTICS
Limits are for -40˚C ≤ T
mb
≤ 150˚C; typicals are for T
mb
= 25˚C.
SYMBOL PARAMETER CONDITIONS MIN. TYP. MAX. UNIT
Protection & detection
V
PSF
Threshold voltage
1
I
F
= 100 µA; V
DS
= 5 V 2.5 3.45 4 V
Normal operation or
protection latched
I
PS
, I
PSL
Supply current V
PS
= 4.5 V - 210 450 µA
V
(CL)PS
Clamping voltage I
P
= 1.5 mA 5.5 6.5 8.5 V
Overload protection latched
V
PSR
Reset voltage 1 1.8 3 V
t
pr
Reset time V
PS
≤ 1 V 10 45 120 µs
OPEN CIRCUIT LOAD DETECTION CHARACTERISTICS
An open circuit load condition can be detected while the TOPFET is in the off-state. Refer to TRUTH TABLE.
V
PS
= 5 V. Limits are for -40˚C ≤ T
mb
≤ 150˚C and typicals are for T
mb
= 25˚C.
SYMBOL PARAMETER CONDITIONS MIN. TYP. MAX. UNIT
I
DSP
Off-state drain current
2
V
IS
= 0 V; 2 V ≤ V
DS
≤ 40 V 0.9 1.8 2.7 mA
V
DSF
Drain threshold voltage
3
V
IS
= 0 V 0.2 1 2 V
V
ISF
Input threshold voltage
4
I
D
= 100 µA 0.3 0.8 1.1 V
OVERLOAD CHARACTERISTICS
T
mb
= 25˚C unless otherwise specified.
SYMBOL PARAMETER CONDITIONS MIN. TYP. MAX. UNIT
Short circuit load protection V
PS
> 4 V
I
D
Drain current limiting
5
V
IS
= 5 V; -40˚C ≤ T
mb
≤ 150˚C 40 62 84 A
P
D(TO)
Overload power threshold for protection to operate 90 220 330 W
T
DSC
Characteristic time which determines trip time
6
250 500 700 µs
Overtemperature protection V
PS
= 5 V
T
j(TO)
Threshold temperature from I
D
≥ 4 A or V
DS
> 0.2 V 150 170 - ˚C
1 When V
PS
is less than V
PSF
the flag pin indicates low protection supply voltage. Refer to TRUTH TABLE.
2 The drain source current which flows in a normal load when the protection supply is high and the input is low.
3 If V
DS
< V
DSF
then the flag indicates open circuit load.
4 For open circuit load detection, V
IS
must be less than V
ISF
.
5 Product specification will include curve showing output characteristics.
6 Trip time t
d sc
varies with overload dissipation P
D
according to the formula t
d sc
~ T
DSC
/ ln[ P
D
/ P
D(TO)
].
July 2002 4 Rev 1.000
