__________________________________________Typical Operating Characteristics

100

50

0.001

1

0.1

0.01

10

EFFICIENCY

vs. LOAD CURRENT, 5V/3A CIRCUIT

60

LOAD CURRENT (A)

70

80

90

STANDARD MAX797 5V/3A

CIRCUIT, FIGURE 1

f = 300kHz

100

50

0.001

1

0.1

0.01

10

EFFICIENCY

vs. LOAD CURRENT, 3.3V/3A CIRCUIT

60

LOAD CURRENT (A)

70

80

90

STANDARD MAX797 3.3V/3A

CIRCUIT, FIGURE 1

f = 300kHz

100

40

50

60

70

80

90

0.1

1

10

EFFICIENCY

vs. LOAD CURRENT, 3.3V/10A CIRCUIT

LOAD CURRENT (A)

SKIP = LOW

SKIP = HIGH

STANDARD MAX797 3.3V/10A

CIRCUIT, FIGURE 1

f = 300kHz

Step-Down Controllers with

Synchronous Rectifier for CPU Power

6

_______________________________________________________________________________________

MAX799

SHDN

DH

–5V

OUTPUT

+5V

OUTPUT

INPUT 6V TO 30V

BST

LX

DL

PGND

CSH

CSL

SS

REF

FROM

REF

SYNC

GND

V+

VL

FB

SECFB

_____________________________________Typical Operating Circuits (continued)