RT5021
Pin No.
28
Pin Name
FB3
Feedback Input Pin of CH3.
Temperature Sense Input. The TS pin connects to a battery’s thermistor to
determine if the battery is too hot or too cold to charge. If the battery’s
temperature is out of range, charging is paused until it re-enters the valid range.
TS also detects whether the battery (with NTC) is present or not.
Power Output Pin of 3.3V Buffer for Battery Temperature Sensing.
Switch Node of CH3.
Power Input Pin of CH3.
Charger Output for Battery.
Power Output for System. Connect this pin to System with a minimum 10μF
ceramic capacitor to GND.
Supply Voltage Input.
USB D+ Input for Charger Type Detection.
USB D- Input for Charger Type Detection.
RTC LDO Power Output Pin.
Exposed PAD Should be Soldered to PCB and Connected to GND.
Pin Function
29
TS
30
31
32
33, 34
35, 36
37
38
39
40
41 (Exposed pad)
VP
LX3
PVD3
BAT
SYS
VIN
DP
DN
VRTC
GND
Copyright
©
2013 Richtek Technology Corporation. All rights reserved.
is a registered trademark of Richtek Technology Corporation.
DS5021-01 April 2013
www.richtek.com
5
RICHTEK [ RICHTEK TECHNOLOGY CORPORATION ]
