RT5035A datasheet(3/44 Pages) RICHTEK

3 / 44 page

RT5035A/B

is a registered trademark of Richtek Technology Corporation.

DS5035A/B-02

February

2017

www.richtek.com

Pin No.

Pin Name

Pin Function

LX10

Switch node of CH10. This pin is in high impedance during shutdown.

VNEG

Output node of negative charge pump to enhance CH2 (PVDD2

LX2A), CH3,

CH4, CH5, CH10 PMOS driving. The regulated voltage is the higher one

between (BAT

 4.5V) and (BAT). When the negative charge pump is off, VNEG

is internally connected to GND. Connect this pin to an external 1

F capacitor.

Negative switch node of charge pump. A fly capacitor is needed between pin CP

and CN.

Positive switch node of charge pump.

BAT

Battery power input and sense pin. Recommend that input bypass capacitors are

as close as possible to the IC. The IC would sense the voltage of this pin for

UVLO and perform body-diode direction control of CH1 PMOS switches. This pin

is also the power input pin of negative charge pump circuit for VNEG.

VOUT4/SWI

Sense pin for CH4 output voltage and power pin for load switch SW4. When

turning off, RT5035A/B would discharge CH4 output capacitors internally till

VOUT4 < 0.1V. Recommend that output capacitors are as close to RT5035A/B

as possible. This pin is in high impedance during shutdown.

VOUT10/FB10

Sense pin of CH10 output voltage. This pin is also the feedback pin for VOUT10

if I2C is set to use the external resistor. When turning off, the IC discharges CH10

output capacitors internally until VOUT10 < 0.1V. Recommend that output

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

during shutdown.

SWO

Power switch output pin of load switch SW4. When turning off, RT5035A/B would

discharge SWO output capacitors internally. This pin is in high impedance during

shutdown.

SDA

Data input and output pin for the I2C serial port.

SCL

Clock input pin for the I2C serial port.

VOUT2

Power output pin for CH2 output voltage. When turning off, RT5035A/B would

discharge CH2 output capacitors internally till VOUT2 < 0.1V.

I2C interface power level must be equal to CH2 output voltage. This pin is in high

impedance during shutdown.

SEQ

Sequence setting pin.

LX2B

Switch node B of CH2. This pin is in high impedance during shutdown.

Enable input pin to activate the RT5035A/B power on (EN = High) and off.

RT5035A/B includes an internal pull-low at EN pin.

LX2A

Switch node A of CH2. This pin is in high impedance during shutdown.

PVDD2

Power input pin of CH2 and it must connect to the same node as BAT. This pin is

in high impedance during shutdown.

LX5

Switch node of CH5. This pin is in high impedance during shutdown.

PVDD5

Power input pin of CH5. PVDD5 could be separated from BAT. And the logic low

level for PMOS is automatically selected. (VNEG or GND) This pin is in high

impedance during shutdown.

VOUT5/FB5

Sense pin of CH5 Output Voltage. This pin is also the feedback pin for VOUT5 if

I2C is set to use the external resistor. When turning off, the IC discharges CH5

output capacitors internally until VOUT5 < 0.1V. Recommend that output

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

during shutdown.

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