RT3605BE
Functional Pin Description
Pin No
1
2
3
4
5
6
10, 11, 7
9, 12, 8
13
14
17, 15, 16
18
19
20
21
22
23
24
25
26
27, 28
29
33, 30
32, 31
34
35
Pin Name
VCC
PSYS
FB_MAIN
COMP_MAIN
VSEN_MAIN
RGND_MAIN
Pin Function
Controller power supply. Connect this pin to 5V and place a RC filter, R =
6.2 and C = 4.7F. The decoupling capacitor should be placed as close to
the PWM controller as possible.
System input power monitor. Place the PSYS resistor as close to the IC as
possible.
Negative input of the error amplifier. This pin is for MAIN rail VR output
voltage feedback to controller.
MAIN rail VR compensation. This pin is error amplifier output pin.
MAIN rail VR voltage sense input. This pin is connected to the terminal of
MAIN rail VR output voltage.
Return ground for MAIN rail VR. This pin is the negative node of the
differential remote voltage sensing.
Positive current sense inputs of multi-phase MAIN rail VR channel 1, 2 and
ISEN[1:3]P_MAIN
3.
Negative current sense inputs of multi-phase MAIN rail VR channel 1, 2 and
ISEN[1:3]N_MAIN
3.
TSEN_MAIN
Thermal sense input for MAIN rail VR.
VR_READY
PWM [1:3]_MAIN
PWM_SA
DRVEN
ISENN_SA
ISENP_SA
FB_SA
COMP_SA
VSEN_SA
RGND_SA
VRON
PWM[1:2]_AUXI
ANS_EN
VR ready indicator.
PWM outputs for MAIN rail VR of channel 1, 2 and 3.
PWM outputs for SA rail VR.
External driver enable control. Connect to driver enable pin.
Negative current sense input of single-phase SA rail VR.
Positive current sense input of single-phase SA rail VR.
Negative input of the error amplifier. This pin is for SA rail VR output voltage
feedback to controller.
SA rail VR compensation. This pin is error amplifier output pin.
SA rail VR voltage sense input. This pin is connected to the terminal of SA
rail VR output voltage.
Return ground for SA rail VR. This pin is the negative node of the
differential remote voltage sensing.
VR enable control input.
PWM outputs for AUXI rail VR.
Acoustic noise suppression function setting. When pulling the pin to VCC,
this function is enabled. This pin is not allowed to be floating.
ISEN[1:2]N_AUXI Negative current sense inputs of multi-phase AUXI rail VR channel 1 and 2.
ISEN[1:2]P_AUXI Positive current sense inputs of multi-phase AUXI rail VR channel 1 and 2.
TSEN_AUXI
FB_AUXI
Thermal sense input for AUXI rail VR.
Negative input of the error amplifier. This pin is for AUXI rail VR output
voltage feedback to controller.
Copyright
©
2019 Richtek Technology Corporation. All rights reserved.
is a registered trademark of Richtek Technology Corporation.
www.richtek.com
4
DS3605BE-00
December 2019
RICHTEK [ RICHTEK TECHNOLOGY CORPORATION ]
