RT3624LE datasheet(3/48 Pages) RICHTEK

3 / 48 page

RT3624LE

is a registered trademark of Richtek Technology Corporation

DS3624LE-00

April

2022

www.richtek.com

Functional Pin Description

Pin No.

Pin Name

Pin Function

8, 5, 1, 4

ISEN[1:4]P

Positive inputs to current-sense amplifier for Phase 1 to 4 of VR GTUS rail.

7, 6, 2, 3

ISEN[1:4]N

Negative inputs to current-sense amplifier for Phase 1 to 4 of VR GTUS

rail.

Negative input of the error amplifier. This pin is for GTUS rail VR output

voltage feedback to controller.

COMP

GTUS rail VR compensation. This pin is an error amplifier output pin.

VSEN

GTUS rail VR voltage sense input. This pin is connected to the terminal of

GTUS rail VR output voltage.

RGND

Return ground for GTUS rail VR. This pin is the negative node of the

differential remote voltage sensing.

VREF_SPS

Fixed 1.3V output reference voltage. This voltage is used to offset the

smart power stage. Between this pin and GND must be placed an exact

0.22

µF decoupling capacitor.

VR_READY

VR ready indicator.

VCLK

Synchronous clock from the CPU.

VDIO

VR and CPU data transmission interface.

ALERT

SVID alert. (Active low)

VR_HOT

Thermal monitor output. (Active low)

IMON

GTUS rail VR current monitor output. This pin outputs a current

proportional to the output current.

VREF

Fixed 0.6V output reference voltage. This voltage is used to offset the

output voltage of all IMON pins. While controller shuts down or sets all rails

in PS4, voltage source shuts down. An exact 0.47

µF decoupling capacitor

and a 3.9

Ω resistor must be placed between this pin and GND.

IMONA

VCCSA rail VR current monitor output. This pin outputs a current

proportional to the output current.

TSEN

Thermal sense input for GTUS rail VR and function setting for current gain

(Ai) and adaptive quick response trigger level for GTUS rail VR.

TSENA

Thermal sense input for VCCSA rail VR and function setting for current

gain (Ai) and adaptive quick response trigger level for VCCSA rail VR.

SET1

Function setting for ICCMAX, VBOOT of GTUS rail and ICCMAX of

VCCSA rail. For soldering check, connect the SET1 pin to 5V and pull the

VRON high. If the soldering is good, both rail outputs are non-zero VBOOT.

SET2

Function setting for VBOOT of VCCSA rail, on-time width setting (switching

frequency) of GTUS rail, selectable VID table, zero load-line and ICCMAX

of AUX rail.

SET3

Function setting for undershoot suppression, DVID fast slew rate, DVID

voltage compensation and

VR_HOT assertion during DVID current limit.

SET4

Function setting for phase number with RT9637 of GTUS rail, on-time

width setting (switching frequency) of VCCSA rail and anti-overshoot

trigger level.

IMON_AUX

AUX rail VR current monitor output. This pin outputs a current proportional

to the output current.

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