SP619
High Current Power Switch
FEATURES
• Max R
DS
(
ON
)
.377 Ohms
• Overcurrent deactivation 800mA
• Max leakage current less than 2µA
while deactivated
• Small 6 pin SOT-23 package
• Built-in Over-temperature Protection
• 4.5V to 5.5V input voltage range
6
5
4
SP619
SOT23-6
APPLICATIONS
• Ultra low cost handsets
• PDA, DSC, MP3 players
• Cell phones
• Power Distribution Switch
• Battery-Charger Circuit
1
2
3
DESCRIPTION
The SP619 is a low R
DS
(
ON
) high current switch designed with precision current lim-
iting to protect connected devices from damage due to a short circuit condition or
against current surges that may cause the supply voltages to fall out of regula-
tion. This switch is functional over an input voltage range of 2.5V to 7V, but is targeted
at 5V applications. The SP619 is also protected from thermal overload which
limits power dissipation. In shutdown mode, the supply current drops to 2
µ
A.
TYPICAL APPLICATION CIRCUIT
Vin
SP619
Vin
Vout
Cin .1µF
100K
Cout
.1µF
LOAD
EN
ON/OFF
80K
GND
April 2008 Rev L
SP619 High Current Power Switch
© 2008
EXAR
Corporation
1