Datasheet

ST890 Device summary
Doc ID 8649 Rev 9 3/21
1 Device summary
Figure 1. SO-8 pin connection (top view)
Table 2. SO-8 pin description
Pin n. Symbol Name and function
1, 2 IN Input P-channel MOSFET source. Bypass IN with a 1 μF capacitor to ground.
3ON
Active-low switch ON input. A logic low turns the switch ON.
4 GND Ground
5 SET
Set current limit input. A resistor from SET to GND sets the current limit for the
switch. R
SET
= 1.24 x 1110 / I
LIM
, where I
LIM
is the desired current limit in
Amperes.
6, 7 OUT
Switch output. P-channel MOSFET drain. Bypass OUT with a 0.1 μF capacitor
to ground.
8FAULT
Fault indicator output. This open drain output goes low when in current limit or
when the die temperature exceeds 135 °C.
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