AAT4685 Datasheet, PDF (2/17 Pages) Skyworks Solutions Inc. – thermal shutdown protection

DATA SHEET
AAT4685
Over-Voltage Protection Switch with OCP and BOVP
Pin Descriptions
Pin #
1
2
3
4
5,6
7,8
9
10
11
12
Symbol
OCP
IC
EN
POK
OUT
IN
GND
FLT
BOVP
OVP (N/C)
Function
Over-current protection threshold input. Connect resistor to ground to set OCP limit.
Internally connected. Connect this pin to ground.
Active low enable with internal 200kΩ resistor pull down to GND
Input supply power-good status pin, open-drain. The POK function is always active whether EN is low or
high. Connect a 1kΩ to 100kΩ pull-up resistor to the logic I/O voltage of the host system.
Output. Connect a 0.1μF~47uF capacitor from OUT to GND.
Power input pin. Connect 1μF capacitor from IN to GND.
Ground connection.
Open-drain output. Active low when input over-voltage, input over-current, battery over-voltage, or over
temperature and EN = low. The FLT pin goes to high impedance state when EN = high. Connect a 1kΩ to
100kΩ pull-up resistor to the logic I/O voltage of the host system.
Battery voltage sense input. Connect to battery positive terminal through a 100kΩ resistor to limit the
current in case of a short circuit condition.
Over-voltage protection threshold input (Adjustable only). Fixed version not connected.
Pin Configuration
TDFN33-12
(Top View)
OCP ¹
IC ²
EN ³
POK ⁴
OUT ⁵
OUT ⁶
12 _{OVP (N/C)}
11 _BOVP
10 _FLT
9 _GND
8 _IN
7 _IN
Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • [e-mail] • www.skyworksinc.com
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201960A • Skyworks Proprietary Information • Products and Product Information are Subject to Change Without Notice. • May 16, 2012