AAT3125 Datasheet, PDF (2/12 Pages) Advanced Analogic Technologies – USB OTG 5V Charge Pump

AAT3125
USB OTG 5V Charge Pump
Pin Descriptions
Pin # Symbol
1
POK1
2
POK2
3 SESDET
4
SRRDY
5
6
7
8, 13
9
10
11
12
14
15
OUT
C1+
C1-
N/C
OUTCP
C2+
C2-
GND
VIN
SR
16
EN
EP
Function
Power OK 1. Open drain output with 4.0V voltage detector. When the OUT pin rises above the
detected voltage (4.0V), POK1 will transition from low to high state. Similarly, when the output
falls below 4.0V, POK1 will transition from high to low. A 10kΩ pull-up resistor is recommended.
Power OK 2. Open drain output with 4.4V voltage detector. When the OUT pin rises above the
detected voltage (4.4V), POK2 will transition from low to high state. Similarly, when the output
falls below 4.4V, POK2 will transition from high to low. A 10kΩ pull-up resistor is recommended.
Session detect. Open drain output with 2.0V voltage detector. When the OUT pin rises above the
detected voltage (2.0V), it will transition from low to high state. Similarly, when the output falls
below 2.0V, SESDET will transition from high to low. A 10kΩ pull-up resistor is recommended.
Session request ready. Open drain output with 0.6V voltage detector. When the OUT pin rises
above the detected voltage (0.6V), it will transition from low to high state. Similarly, when the
output falls below 0.6V, SRRDY will transition from high to low. A 10kΩ pull-up resistor is rec-
ommended.
Power output to VBUS.
Flying capacitor 1 positive terminal.
Flying capacitor 1 negative terminal.
No connect.
Charge pump output. Requires 1µF bypass capacitor to ground.
Flying capacitor 2 positive terminal.
Flying capacitor 2 negative terminal.
Ground.
Input power supply. Requires 1µF bypass capacitor to ground.
Session request input control pin. Should not be left floating. Must connect to high or low. For
more details, see Table 1.
Enable input control pin. When in the low state, the AAT3125 is powered down and consumes
a small amount of power. When connected high, it is in normal operation. This pin should not
be left floating. For more details, see Table 1.
Exposed paddle (bottom); connect to GND directly beneath package.
Pin Configuration
QFN44-16
(Top View)
POK1 ¹
POK2 ²
SESDET ³
SRRDY ⁴
12 _GND
11 _C2-
10 _C2+
9 _OUTCP
2
3125.2005.12.1.4