MAX1717 View Datasheet(PDF) - Maxim Integrated

Part Name

Description

Manufacturer

MAX1717

Dynamically Adjustable, Synchronous Step-Down Controller for Notebook CPUs

Maxim Integrated 

Dynamically Adjustable, Synchronous

Step-Down Controller for Notebook CPUs

Typical Operating Characteristics

(Circuit of Figure 1, components of Table 1, V+ = +12V, VDD = VCC = SKP/SDN = +5V, VOUT = 1.6V, TA = +25°C, unless otherwise noted.)

EFFICIENCY vs. LOAD CURRENT

300kHz STANDARD APPLICATION,

CIRCUIT 1

EFFICIENCY vs. LOAD CURRENT

300kHz VOLTAGE POSITIONED, CIRCUIT 2

EFFECTIVE EFFICIENCY vs. LOAD CURRENT

300kHz VOLTAGE POSITIONED, CIRCUIT 2

100

SKIP MODE, V+ = 7V

100

SKIP MODE, V+ = 7V

100

SKIP MODE, V+ = 7V

90 SKIP MODE, V+ = 12V

SKIP MODE,

V+ = 20V

80

PWM MODE,

V+ = 7V

70

PWM MODE, V+ = 12V

60

PWM MODE, V+ = 20V

50

0.01

0.1

1

10

LOAD CURRENT (A)

90 SKIP MODE, V+ = 12V

SKIP MODE,

V+ = 20V

80

PWM

MODE,

70 V+ = 7V

60

PWM MODE,

V+ = 12V

PWM MODE,

V+ = 20V

50

0.01

0.1

1

10

LOAD CURRENT (A)

90 SKIP MODE, V+ = 12V

SKIP MODE,

V+ = 20V

80

PWM MODE,

V+ = 7V

70

60

PWM MODE, V+ = 12V

50

0.01

PWM MODE, V+ = 20V

0.1

1

10

NONPOSITIONED LOAD CURRENT (A)

EFFICIENCY vs. LOAD CURRENT

550kHz VOLTAGE POSITIONED, CIRCUIT 3

100

SKIP MODE, V+ = 7V

90 SKIP MODE, V+ = 12V

PWM MODE,

V+ = 7V

80

SKIP MODE,

V+ = 20V

70

EFFECTIVE EFFICIENCY vs. LOAD CURRENT

550kHz VOLTAGE POSITIONED, CIRCUIT 3

100

SKIP MODE, V+ = 7V

SKIP MODE, V+ = 12V

90

PWM MODE,

V+ = 7V

80

SKIP MODE,

V+ = 20V

70

EFFICIENCY vs. LOAD CURRENT

1000kHz, +5V, CIRCUIT 4

100

SKIP MODE

90

80

70

PWM MODE

60

PWM MODE,

V+ = 12V

60

PWM MODE,

V+ = 12V

60

50

0.01

PWM MODE, V+ = 20V

0.1

1

10

LOAD CURRENT (A)

EFFECTIVE EFFICIENCY vs. LOAD CURRENT

1000kHz, +5V, CIRCUIT 4

100

SKIP MODE

90

80

70

PWM MODE

50

0.01

PWM MODE, V+ = 20V

0.1

1

10

NONPOSITIONED LOAD CURRENT (A)

EFFICIENCY vs. LOAD CURRENT

1000kHz VOLTAGE POSITIONED,

CIRCUIT 5

100

SKIP MODE, V+ = 7V

90 SKIP MODE, V+ = 12V

PWM MODE,

V+ = 7V

80

SKIP MODE,

V+ = 20V

70

PWM MODE,

V+ = 12V

50

0.01

0.1

1

10

LOAD CURRENT (A)

EFFECTIVE EFFICIENCY vs. LOAD CURRENT

1000kHz VOLTAGE POSITIONED,

CIRCUIT 5

100

SKIP MODE, V+ = 7V

90 SKIP MODE, V+ = 12V

PWM MODE,

V+ = 7V

80

SKIP MODE,

V+ = 20V

70

PWM MODE,

V+ = 12V

60

50

0.01

0.1

1

10

NONPOSITIONED LOAD CURRENT (A)

60

50

0.01

PWM MODE,

V+ = 20V

0.1

1

10

LOAD CURRENT (A)

60

PWM MODE,

V+ = 20V

50

0.01

0.1

1

10

NONPOSITIONED LOAD CURRENT (A)

6 _______________________________________________________________________________________

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