ST890B Просмотр технического описания (PDF) - STMicroelectronics

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ST890B

1.2 A current limited high side power switch with thermal shutdown

STMicroelectronics 

ST890B, ST890C, ST890D

1

Device summary

Figure 1. SO-8 pin connection (top view)

Device summary

IN 1

IN 2

ON 3

GND 4

8 FAULT

7 OUT

6 OUT

5 SET

CS07570

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

3

ON

Active low switch ON input. A logic low turns the switch ON

4

GND

Ground

Set current limit input. A resistor from SET to GND sets the

5

SET

current limit for the switch. RSET = 1.38 x 103 / ILIM, where

ILIM 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

Fault indicator output. This open drain output goes low

8

FAULT

when in current limit or when the die temperature exceeds

135°C

3/17

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