SI4700DY Datasheet, PDF (1/8 Pages) Vishay Siliconix – Power Selector Switch

New Product
Power Selector Switch
Si4700DY
Vishay Siliconix
FEATURES
APPLICATIONS
D MOSFETs Configured To Give Spdt Switch
With One Control Input
D 2.5- to 8-V Ground Referenced Control Input
D 30-mW Main Switch On-Resistance
D 70-mW Alternate Switch On-Resistance
D SOIC-8 Package
D 3000-V ESD Protection On Control Input
D Zero Power Consumption In Alternate Power
Mode
D ACPI Power Switching In Desktop
Computers
DESCRIPTION
The Si4700DY consists of two MOSFETs configured for use as
a single-pole, double-throw (SPDT) switch. A single ground
referenced input, controls which switch is on. The Si4700DY
is intended for use in applications where two power sources
are available and the circuit must select one of the two
depending on the conditions. An example of such a circuit is
ACPI implementation in computers where part of a circuit must
switch to an “always-on” power supply when the computer is
in suspend mode, but runs off the main power supply for
normal operation.
FUNCTIONAL BLOCK DIAGRAM AND PIN CONFIGURATION
4
Q1
V_S2
R_G
8
V_G
3
Q2
V_S1
1
ON/OFF
Document Number: 71110
S-00025—Rev. A, 24-Jan-00
Q3
2
5, 6, 7
V_D
C_O
GND
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