ISL8022 查看數據表（PDF） - Intersil

零件编号

产品描述 (功能)

比赛名单

ISL8022

Dual 2A/1.7A Low Quiescent Current 2.25MHz High Efficiency Synchronous Buck Regulator

Intersil 

Typical Applications

IN P U T 2.8V TO 5.5V

C1

2 x 10µF

ISL8022

LX1

PGND

V IN

FB1

EN1

EN2

IS L 8 0 2 2

PG

SYNC

LX2

PGND

FB2

L1

1 .2 µ H

C2

22µF

R2

316k

OUTPUT1

2 .5 V /2 A

C3

10pF

R3

100k

L2

1.2µH

OUTPUT2

1.8V /1.7A

C4

22µF

R5

200k

C5

10pF

R6

100k

FIGURE 1. TYPICAL APPLICATION DIAGRAM - DUAL INDEPENDENT OUTPUTS

VOUT

C1

C2 (or C4)

C3 (or C5)

L1 (or L2)

R2 (or R5)

R3 (or R6)

0.8V

2x10µF

22µF

10pF

1.0~2.2µH

33k

100k

TABLE 1. COMPONENT VALUE SELECTION

1.2V

1.5V

1.8V

2x10µF

2x10µF

2x10µF

22µF

22µF

22µF

10pF

10pF

10pF

1.0~2.2µH

1.0~2.2µH

1.5~3.3µH

100k

150k

200k

100k

100k

100k

In Table 1, the minimum output capacitor value is given

for different output voltage to make sure the whole

converter system is stable. Output capacitance should

increase to support faster load transient requirement.

2.5V

2x10µF

22µF

10pF

1.5~3.3µH

316k

100k

3.3V

2x10µF

22µF

10pF

1.5~4.7µH

450k

100k

2

FN7650.1

August 25, 2010

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