st890b STMicroelectronics, st890b Datasheet - Page 3

• Manufacturer Part Number: st890b
• Description: 1.2 A Current Limited High Side Power Switch With Thermal Shutdown
• Manufacturer: STMicroelectronics

ST890B, ST890C, ST890D
1
Device summary
Figure 1.
Table 2.
Pin N.
1, 2
6,7
3
4
5
8
SO-8 pin connection (top view)
SO-8 pin description
GND
Symbol
FAULT
ON
GND
OUT
SET
ON
IN
IN
IN
1
2
3
4
Input P-channel MOSFET source. Bypass IN with a 1 μF
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 GND sets the
current limit for the switch. R
I
Switch output. P-channel MOSFET drain. Bypass OUT with
a 0.1 μF capacitor to ground
Fault indicator output. This open drain output goes low
when in current limit or when the die temperature exceeds
135°C
LIM
is the desired current limit in Amperes
Name and function
8
7
6
5
FAULT
OUT
OUT
SET
SET
= 1.38 x 103 / I
Device summary
CS07570
LIM
, where
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