RT3614EE
Functional Pin Description
Pin No.
4, 1, 5,32
3, 2, 6, 31
Pin Name
Pin Function
ISEN [1:4] P Positive inputs of current-sense amplifier of channel 1, 2, 3 and 4.
ISEN [1:4] N Negative inputs of current-sense amplifier of channel 1, 2, 3 and 4.
Thermal sense input and function settings for advanced ramp magnitude in PS1,
7
TSEN
advanced ramp magnitude in PS0, zero loadline enable and DVID voltage
compesation.
Input voltage pin. Connect an RC filter whose time constant need less than switch
period for sensing input voltage.
8
VIN
9
VRON
Controller enable pin. A logic high signal enables the controller.
10
VR_READY VR ready indicator.
12, 13, 11, 14 PWM [1:4]
PWM outputs for channel 1, 2, 3 and 4.
External driver (discrete power MOSFET driver or Dr.MOS) mode control. For
discrete power MOSFET driver application, connecting 100kΩ resistor to GND is
required.
15
DRVEN
16
17
18
19
VR_HOT#
ALERT#
VDIO
Thermal monitor output. (Active low).
SVID alert. (Active low)
VR and CPU data transmission interface.
Synchronous clock from the CPU.
VCLK
Function settings for loop response speed-up adaptiv quick response(AQR)
trigger level, zero current detection, sum OCP ratio and undershoot suppression.
20
21
SET3
SET2
Function settings for anti-overshoot trigger level, current gain(Ai), DVID fast slew
rate, acoustic noise suppression and high frequency ACLL voltage compensation
in PS1.
Function settings for ICCMAX, TON width setting (switching frequency) and
VBOOT. Connect the SET1 pin to 5V and turn on the VRON pin, if the soldering is
good, the output voltage is 1.8V.
22
SET1
System input power monitor. Place the PSYS resistor as close to the IC as
possible.
Controller power supply. Connect this pin to 5V and place an RC filter, R = 6.2Ω
and C = 4.7μF. The decoupling capacitor should be as close as physically
possible to the VCC pin.
23
24
25
PSYS
VCC
Current monitor output for controller. This pin outputs a voltage proportional to the
output current.
IMON
Voltage source output. During controller internal setting period, it outputs 3.2V. In
normal operation, it outputs 0.6V to offset IMON signal. While controller shuts
down or in PS4, voltage source shuts down. An exact 0.47uF capacitor and 3.9Ω
resistor from this pin to GND are required for stability.
Return ground. This pin is the negative input of output voltage differential remote
sense.
26
27
VREF06
RGND
Voltage sense input. This pin is connected to the terminal of controller output
voltage.
28
29
30
VSEN
COMP
FB
Error amplifier output pin.
Negative input of the error amplifier. This pin is for output voltage feedback to
controller.
33
Ground. The exposed pad must be soldered to a large PCB and connected to
GND with enough VIA numbers for maximum power dissipation.
GND
(Exposed Pad)
Copyright 2019 Richtek Technology Corporation. All rights reserved.
©
is a registered trademark of Richtek Technology Corporation.
DS3614EE-01 December 2019
www.richtek.com
3
RICHTEK [ RICHTEK TECHNOLOGY CORPORATION ]
