Philips Semiconductors
Product specification
TOPFET dual high side switch
BUK218-50DY
DESCRIPTION
Monolithic dual channel high side
protected power switch in
TOPFET2 technology assembled in
a 7 pin plastic surface mount
package.
QUICK REFERENCE DATA
SYMBOL
I
L
SYMBOL
PARAMETER
Nominal load current (ISO)
PARAMETER
Continuous off-state supply voltage
Continuous load current
Continuous junction temperature
On-state resistance, T
j
= 25藲C
MIN.
8
MAX.
50
16
150
40
UNIT
A
UNIT
V
A
藲C
m鈩?/div>
APPLICATIONS
General purpose switch for driving
automotive lamps, motors,
solenoids, heaters.
V
BG
I
L
T
j
R
ON
FEATURES
Vertical power TrenchMOS
Low on-state resistance
CMOS logic compatible
Very low quiescent current
Overtemperature protection
Load current limiting
Latched overload and
short circuit protection
Overvoltage and undervoltage
shutdown with hysteresis
Off-state open circuit
load detection
Diagnostic status indication
Voltage clamping for turn off
of inductive loads
ESD protection on all pins
Reverse battery, overvoltage
and transient protection
FUNCTIONAL BLOCK DIAGRAM
INPUT 1
BATT
INPUT 2
STATUS
CONTROL &
PROTECTION
CIRCUITS
LOAD 1
GROUND
RG
LOAD 2
Fig.1. Elements of the TOPFET dual HSS with internal ground resistor.
PINNING - SOT427
PIN
1
2
3
4
5
6
7
mb
DESCRIPTION
load 1
ground
input 1
connected to mb
status
input 2
load 2
battery
PIN CONFIGURATION
mb
SYMBOL
B
I1
L1
DUAL
HSTF
I2
S
G
L2
1234567
Fig. 2.
Fig. 3.
CONVENTION
Positive currents flow into pins, except for load and ground pins.
May 2001
1
Rev 1.400
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