RT3624LE datasheet(4/48 Pages) RICHTEK

4 / 48 page

RT3624LE

is a registered trademark of Richtek Technology Corporation

www.richtek.com

DS3624LE-00

April

2022

Pin No.

Pin Name

Pin Function

PSYS

System input power monitor. Place the PSYS resistor as close to the IC as

possible. The input power domain(SVID Address 0x0Dh) rail can be

disabled by pulling the voltage at the PSYS pin > (VCC – 0.5V). RT3624LE

rejects any commands to the input power domain rail. If the platform

doesn't support PSYS function, it is recommended to connect PSYS pin to

GND to avoid affecting system performance.

RGNDA

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

differential remote voltage sensing.

VSENA

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

VCCSA rail VR output voltage.

COMPA

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

FBA

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

voltage feedback to controller.

37, 34

ISENA[1:2]N

Negative inputs to current-sense amplifier for Phase 1 to 2 of VR VCCSA

rail.

36, 35

ISENA[1:2]P

Positive inputs to current-sense amplifier for Phase 1 to 2 of VR VCCSA

rail.

ISENP_AUX

Positive input to current-sense amplifier of VR AUX rail.

ISENN_AUX

Negative input to current-sense amplifier of VR AUX rail.

DBLR_PS

External driver mode control. As PS4 command is received, this pin is in

high state. This pin can work with RT9637 to drive two power stages with

single PWM signal. As PS0 command is received, this pin is in low state.

As PS1 command is received, this pin is in floating state. As PS2/3

command is received, this pin is in high state.

DRVEN

External driver mode control. As PS4 command is received, this pin is in

low state. The output high level is VCC.

DRVEN_F

External driver mode control. As PS4 command is received, this pin is in

floating state. The output high level is VCC.

44, 43

PWMA[1:2]

PWM outputs for VCCSA rail VR. The tri-state window = 1.6V to 2.2V.

45, 46, 48, 47

PWM[1:4]

PWM outputs for GTUS rail VR. The tri-state window = 1.6V to 2.2V.

ANS_EN

Acoustic Noise Suppression function setting. When the pin is pulled to

VCC, this function can be enabled. This pin is not allowed to be floating.

VCC

Controller power supply. Connect this pin to 5V and place an RC filter, R =

2.2

Ω and C = 4.7µF. The decoupling capacitor should be placed as close

to PWM controller as possible. The recommended size of RVCC is 0603.

VRON

VR enable control input.

VIN/VSYS

VIN/VSYS input pin. Connect a low pass filter to this pin to set on-time.

(Exposed Pad)

GND

Ground. The Exposed Pad must be soldered to a large PCB and

connected to GND for maximum power dissipation.

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