RT8036

2

DS8036-02 April 2011

www.richtek.com

Functional Pin Description

Pin N o.

Pin Name

Pin Function

1

VINL1

Supply Input for LDO1 and LDO2.

2

ENL1

Chip Enable for LDO1 (Active High).

3

ENL2

Chip Enable for LDO2 (Active High).

4

VINB

Supply Input for Buck Converter.

5

LX

Power Switching Output.

6, 8, 10

PGND

Power Ground.

7

ENB

Chip Enable for Buck Converter (Active High).

9

VOUTB

Feedback Input of Buck Converter.

11

ENL3

Chip Enable for LDO3 (Active High).

12

ENL4

Chip Enable for LDO4 (Active High).

13, 17

AGND

Analog Ground.

14

VOUTL4

LDO4 Output.

15

VOUTL3

LDO3 Output.

16

VINL2

Supply Input for LDO3 and LDO4.

18

NC

No Internal Connection.

19

VOUTL1

LDO1 Output.

20

VOUTL2

LDO2 Output.

21 (Exposed Pad) GND

Ground. The exposed pad must be soldered to a large PCB and connected to

AGND for maximum power dissipation.

Typical Application Circuit

VINB

ENL2

VINL1

ENL1

VOUTL3

VOUTL4

ENL4

AGND

ENB

VOUTB

VOUTL2

VOUTL1

VINL2

LX

ENL3

PGND

RT8036

1µF

1µF

1µF

1µF

10µF

L

2.2µH

1µF

1µF

Chip Enable

4.7µF

15

14

13, 17

12

19

20

1

2

3

4

9

7

6, 8, 10

11

5

16