RT3624LE datasheet(20/48 Pages) RICHTEK

20 / 48 page

RT3624LE

is a registered trademark of Richtek Technology Corporation

www.richtek.com

DS3624LE-00

April

2022

Function Setting

Symbol

Description

SET4

Divider Register[4:3] GTUS VR Phase Extension

DBLR[4:3]

DBLR[4:3] = 00: Enable, Phase=8

DBLR[4:3] = 01: Disable, Phase=1~4

DBLR[4:3] = 10: Enable, Phase=5

DBLR[4:3] = 11: Enable, Phase=6

Divider Register[2:0]

VCCSA VR TON width setting

(switching frequency)

kTON_A[2:0]

According to required frequency,

select adaptive kTON_A parameter.

IXR Register[4:3]

GTUS VR Anti-overshoot

trigger level

ANTIOVS_TH[4:3]

ANTIOVS for reduction of overshoot

at loading falling edge. Set trigger

level.

IXR Register[2:1]

VCCSA VR Anti-overshoot

trigger level

ANTIOVS_TH_A[2:1]

ANTIOVS for reduction of overshoot

at loading falling edge. Set trigger

level.

TSEN

Divider Register[4:3] GTUS VR Current Gain

Ai[4:3]

Current gain setting

Divider Register[2:1]

GTUS VR Adaptive Quick

Response(AQR) trigger level

AQR_TH[2:1]

AQR for loop response speed-up of

loading rising edge. Set trigger level.

TSENA

Divider Register[4:3] VCCSA VR Current Gain

Ai_A[4:3]

Current gain setting

Divider Register[2:1]

VCCSA VR Adaptive Quick

Response(AQR) trigger level

AQR_TH_A[2:1]

AQR for loop response speed-up of

loading rising edge. Set trigger level.

Referring to PIN-SETTING tables, Table 2 to 11, users

can search corresponding Vdivider or VIXR according to

the desired function setting combinations. Then SETx

external resistors can be calculated as follows:

IXR

divider

3.2V V

80 A V

R1 V

3.2V V

−

Richtek provides a Microsoft Excel-based design tool to

calculate the desired PIN-SETTING resisters.

TSEN and TSENA pins also have function settings

except for thermal monitoring function. They only utilize

divider

part

PIN-SETTING

mechanism.

The

functions of TSEN and TSENA include current gain and

quick response trigger level settings. The detailed

operation is described in Thermal Monitoring and

Indicator section.

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