Rainbow-electronics MAX1638 Manuel d'utilisateur télécharger pdf (Page 12)

MAX1638

High-Speed Step-Down Controller with

Synchronous Rectification for CPU Power

12 ______________________________________________________________________________________

(OPTIONAL)

R10

(OPTIONAL)

39Ω

C12

3.3nF

C11

3.3nF

CSH

PWROK

CSL

BST

PGND

PDRV

NDRV

AGND

REF

CC1

CC2

CC1

RC1

AGND

C6, 1.0µF

CERAMIC

CONNECTION

100k

0.1µF

10µF

10Ω

TO V

FREQ

REF

0.1µF

4.7µF

CMPSH-3

0.1µF

= 5V

39Ω

LOCAL

BYPASSING

MAX1638

R11

OUT

= 1.3V

TO 3.5V

LOAD

Figure 5. Buck Regulator with High-Side Current Sensing

1 2 ... 7 8 9 10 11 12 13 14 15 16

EVALUATION KIT 1
AVAILABLE 1
ABSOLUTE MAXIMUM RATINGS 2
ELECTRICAL CHARACTERISTICS 2
OSCILLATOR 8
Internal Reference 9
Ω (max) 10
Board Layout Considerations 11
Settings 13
Choosing the MOSFET Switches 14
Efficiency Considerations 16

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Rainbow-electronics MAX1638 Manuel d'utilisateur Page 12

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