RT5035B datasheet(4/44 Pages) RICHTEK

4 / 44 page

RT5035A/B

is a registered trademark of Richtek Technology Corporation.

www.richtek.com

DS5035A/B-02

February

2017

Pin No.

Pin Name

Pin Function

VOUT8

Regulated output node of CH8 generic LDO. When turning off, RT5035A/B would

discharge CH8 output capacitors internally till VOUT8 < 0.1V. This pin is in high

impedance during shutdown.

PVDD8

Power input node of CH8 generic LDO. This pin is in high impedance during

shutdown.

LX3

Switch node of CH3. This pin is in high impedance during shutdown.

C32K

RTC 32768Hz clock output pin. Its rails are VDDM and GND. When RESET

goes low, C32K outputs low.

PVDD3

Power input pin of CH3 and it must connect to the same node as BAT. This pin is

in high impedance during shutdown.

VOUT3/FB3

Sense pin of CH3 output voltage. This pin is also the feedback pin for VOUT3 if

I2C is set to use the external resistor. When turning off, the IC discharges CH3

output capacitors internally until VOUT3 < 0.1V. Recommend that output

capacitors are as close as possible to the IC. This pin is in high impedance

during shutdown.

RTCGND

Ground pin for RTC timer counter and oscillator.

XOUT

Crystal o

utput. This pin’s parasitic capacitance should be kept as low as

possible. Noise interference should also be avoided.

XIN

Crystal i

nput. This pin’s parasitic capacitance should be kept as low as possible.

Noise interference should also be avoided.

RTCPWR

RTCLDO power pin. Connect this pin to a backup battery

VDDM

Regulation voltage output of CH9 keep-alive LDO. It also provides power for all

IC control circuit.

SYNC

PLL synchronous input pin.

VOUT1

Power output and sense pin for CH1 output voltage. Recommend that output

capacitors are as close to RT5035A/B as possible. This pin is in high impedance

during shutdown.

(Exposed Pad)

GND

RT5035A/B power ground and control circuit ground. Exposed PAD should be

soldered to PCB and connected to GND.

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