SI4779CY Datasheet, PDF (7/8 Pages) Vishay Siliconix – High-Side N-Channel Switch with Current Limit

PIN CONFIGURATION
New Product
Si4779CY
Vishay Siliconix
SO-8
IN ₁
8 ^OUT
IN ₂
7 ^OUT
Si4778DY
ON ₃
6 ^FAULT
ET ₄
5 ^GND
Top View
PIN DESCRIPTION
Pin Symbol
Description
1, 2
IN
Input. N-channel MOSFET drain, bypass IN with a 100-mF capacitor to GND.
3
ON
Active-low switch-on input, logic low turns switch on. ON needs to be connected to
V_IN during power up, then connect to GND to activate the switch after power up.
4
SET
Current-limit input. A resistor from SET to GND sets the current limit for the switch.
5
GND Ground
6
FAULT
Fault indicator output. This open drain output goes low when the circuit is in current
limit or in short circuit protection mode.
7, 8
OUT Switch output. N-channel MOSFET source.
DETAILED BLOCK DIAGRAM
1
IN
2
IN
UVLO
CP
3
ON
QB
Q
S
R
D
4
SET
R_SET
EA
BG
+
–
+
–
8
OUT
7
OUT
6
FAULT
5
GND
Document Number: 71664
S-04276—Rev. A, 16-Jul-01
FIGURE 12.
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