RT9218 查看數據表（PDF） - Richtek Technology

零件编号

产品描述 (功能)

比赛名单

RT9218

5V/12V Synchronous Buck PWM DC-DC and Linear Power Controller

Richtek Technology 

RT9218

Typical Application Circuit

VIN

5 to 12V

VCC

12V D1

1N4148

RBOOT

2.2

C8

0.1uF

VCC

12V

PHASE

C1 to C2

1000uF x 2

C3 to C4

1uF x 2

C7

RUGATE

1uF

SVOUT

Q1

L1

MU

2.2

PHASE

C5 to C6

1000uF x 2

2.2uH

R Q2

ML

C

Q3

RT9218

1 BOOT PHASE 14

2 UGATE

3 GND

OPS 13

FB 12

4 LGATE

VCC 11

5 DRV

6 NC

PGOOD 10

9

FBL

7 NC

NC 8

R3

10R

ROCSET

Q4

Disable

C10

3904

1uF

R1

LVOUT

4k

R2

C9

8k

470uF

R4

C11

1k/NC 0.1uF/NC R6

R5

32R

68R

SVOUT

=

VREF

×

(1

+

R5

R6

)

LVOUT

=

VREF

× (1+

R1)

R2

VREF : Internal reference voltage

(0.8V ± 2%)

www.richtek.com

2

DS9218-08 March 2007

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