Philips Semiconductors
Product specification
TOPFET dual high side switch
BUK218-50DC
QUICK REFERENCE DATA
DESCRIPTION
Monolithic dual channel high side
SYMBOL
PARAMETER
MIN.
UNIT
protected power switch in
TOPFET2 technology assembled in
I
L
Nominal load current (ISO)
8
A
a 7 pin plastic surface mount
package.
SYMBOL
PARAMETER
MAX.
UNIT
APPLICATIONS
V
BG
Continuous off-state supply voltage
50
V
General purpose switch for driving
I
L
Continuous load current
16
A
lamps, motors, solenoids, heaters.
T
j
Continuous junction temperature
150
˚C
R
ON
On-state resistance, T
j
= 25˚C
40
m
Ω
FEATURES
FUNCTIONAL BLOCK DIAGRAM
Vertical power TrenchMOS
Low on-state resistance
CMOS logic compatible
Very low quiescent current
Overtemperature protection
Load current limiting
Overload and
short circuit protection
Self resetting overcurrent
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
Fig.1. Elements of the TOPFET dual HSS with internal ground resistor.
PINNING - SOT427
PIN CONFIGURATION
SYMBOL
PIN
DESCRIPTION
1
load 1
2
ground
3
input 1
4
connected to mb
5
status
6
input 2
7
load 2
mb
battery
Fig. 2.
Fig. 3.
CONVENTION
Positive currents flow into pins, except for load and ground pins.
STATUS
GROUND
INPUT 2
RG
CONTROL &
PROTECTION
CIRCUITS
INPUT 1
LOAD 1
BATT
LOAD 2
1 2 3 4 5 6 7
mb
I1
I2
L1
L2
G
B
S
DUAL
HSTF
October 2001
1
Rev 2.010
