PRODUCT DATASHEET
AAT3170
ChargePump
TM
Pin Descriptions
Pin #
1, 12
2
3
4
5
6
7
8
9
10
11
EP
High Current LED Flash Driver Charge Pump IC
Symbol
VIN
C1+
C1-
GND
F1
F2
EN/SET
CT
C2-
C2+
VOUT
Function
Input power supply pin. Requires 4.7μF or larger ceramic bypass capacitor to ground.
Flying capacitor C1 positive terminal. Connect a 1μF ceramic capacitor between C1+ and C1-.
Flying capacitor C1 negative terminal.
Ground connection.
Current sink input #1.
Current sink input #2.
AS
2
Cwire serial interface control pin.
Flash timer control capacitor input. Connect a 100nF capacitor from CT to GND for a one second timeout
duration.
Flying capacitor C2 negative terminal.
Flying capacitor C2 positive terminal. Connect a 1μF ceramic capacitor between C2+ and C2-.
Charge pump output. Requires 2.2μF or larger ceramic capacitor connected between this pin and ground.
Exposed paddle (bottom); connect to GND directly beneath package.
Pin Configuration
TDFN33-12
(Top View)
VIN
C1+
C1-
GND
F1
F2
1
2
3
4
5
6
12
11
10
9
8
7
VIN
VOUT
C2+
C2-
CT
EN/SET
2
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3170.2007.11.1.2