ST890 ST Microelectronics, ST890 Datasheet - Page 2

• Manufacturer Part Number: ST890
• Description: 1.2A CURRENT LIMITED HIGH SIDE
• Manufacturer: ST Microelectronics

ST890
Table 2: Absolute Maximum Ratings
Absolute Maximum Ratings are those values beyond which damage to the device may occur. Functional operation under these condition is
not implied.
Table 3: Thermal Data
(*) This value depends from thermal design of PCB on which the device is mounted.
Table 4: Truth Table For ON/OFF Switch
Table 5: Pin Description
2/9
V
Symbol
Symbol
R
FAULT_N
V
V
thj-amb
T
T
I
V
SET
DS
ON
stg
Pin N°
op
I
1, 2
6, 7
3
4
5
8
ON/OFF
FAULT
H
H
Supply Voltage
Input Voltage at ON pin
Input Voltage at FAULT_N pin
Voltage at SET pin
Maximum Continuous Switching Current
Storage Temperature Range
Operating Junction Temperature Range (C series)
Thermal Resistance Junction-ambient (*)
L
L
Symbol
FAULT
GND
OUT
SET
ON
IN
Normal Operation
Fault Condition
Input P-Channel MOSFET source. Bypass IN with a 1µF capacitor to ground.
Active Low Switch On Input. A logic low turns the switch ON
Ground
Set Current Limit Input. A resistor from SET to GROUND sets the current limit for
the switch. R
Switch Output. P-Channel MOSFET drain. Bypass OUT with a 0.1µF capacitor to
GROUND.
Fault Indicator Output. This open drain output goes low when in current limit or
when the die temperature exceeds 135°C
FLAG
OUT
OFF
Parameter
Parameter
ON
SET
(B series)
=1.38x10
Figure 2: Pin Connection (top view)
3
/I
LIM
Name and Function
, where I
LIM
is the desired current limit in Amperes
-0.5 to (V
-65 to +150
-40 to +85
-0.5 to 6
-0.5 to 6
-0.5 to 6
0 to +70
Value
SO-8
160
1.5
IN
+ 0.5)
°C/W
Unit
Unit
°C
°C
°C
V
V
V
V
A