ISL85410 데이터 시트보기 (PDF) - Intersil

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ISL85410

Wide VIN 1A Synchronous Buck Regulator

Intersil 

ISL85410

Typical Application Schematics

CBOOT

100nF

VOUT

COUT

10µF

L1

22µH

CVIN

10µF

1 SS

2

SYNC

3 BOOT

4 VIN

5 PHASE

6

PGND

GND

FS 12

11

COMP

10

FB

9

VCC

PG

EN

R2

R3

CVCC

1µF

CFB

FIGURE 3. INTERNAL DEFAULT PARAMETER SELECTION

CSS

CBOOT

100nF

VOUT

COUT

10µF

L1

22µH

CVIN

10µF

1

SS

2

SYNC

3 BOOT

4 VIN

5 PHASE

6

PGND

GND

12

FS

11

COMP

10

FB

9

VCC

PG

EN

RFS

R2

R3

CVCC

1µF

RCOMP

CCOMP

CFB

VOUT

L1

(V)

(µH)

12

22

5

22

3.3

22

2.5

22

1.8

12

NOTE:

1. Connect FS to Vcc

COUT

(µF)

2 x 22

47 + 22

47 + 22

47 + 22

47 + 22

FIGURE 4. USER PROGRAMMABLE PARAMETER SELECTION

TABLE 1. EXTERNAL COMPONENT SELECTION

R2

R3

CFB

RFS

(kΩ)

(kΩ)

(pF)

(kΩ)

90.9

4.75

22

115

90.9

12.4

27

DNP (Note 1)

90.9

20

27

DNP (Note 1)

90.9

28.7

27

DNP (Note 1)

90.9

45.5

27

DNP (Note 1)

RCOMP

(kΩ)

150

100

100

100

70

CCOMP

(pF)

470

470

470

470

470

4

FN8375.2

November 22, 2013

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