RT9004

Preliminary

2

DS9004-00 February 2008

www.richtek.com

Typical Application Circuit

Functional Pin Description

VIN1

GND

VOUT1

RT9004

V

IN

V

OUT1

VIN2

1uF

VOUT2

VOUT3

VIN3

V

OUT2

V

OUT3

C

OUT

2.2uF

C

IN

EN1

EN2

EN3

Chip Shutdown

Chip Enable

VIN1

GND

VOUT1

RT9004

V

IN1

V

OUT1

VIN2

1uF

VOUT2

VOUT3

VIN3

V

OUT2

V

OUT3

C

OUT

1uF

C

IN

EN1

EN2

EN3

Chip Shutdown

Chip Enable

V

IN2

V

IN3

Pin Number

Pin Nam e

Pin Function

1

VOUT1

Output Voltage 1.

2

VOUT2

Output Voltage 2.

3

Exposed Pad (11)

GND

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

for maximum power dissipation.

4

VOUT3

Output Voltage 3.

5

EN3

Chip Enable 3 (Active High). Note that this pin is high impedance. There should be a

pull low 100k

Ω resistor connected to GND when the control signal is floating.

6

VIN3

Input Voltage 3.

7

EN2

Chip Enable 2 (Active High). Note that this pin is high impedance. There should be a

pull low 100k

Ω resistor connected to GND when the control signal is floating.

8

VIN2

Input Voltage 2.

9

EN1

Chip Enable 1 (Active High). Note that this pin is high impedance. There should be a

pull low 100k

Ω resistor connected to GND when the control signal is floating.

10

VIN1

Input Voltage 1.