5V/3.3V or Adjustable, 100% Duty-Cycle,

High-Efficiency, Step-Down DC-DC Controllers

4

_______________________________________________________________________________________

____________________________Typical Operating Characteristics (continued)

0

-60 -40

MAX1626 SHUTDOWN CURRENT

vs. TEMPERATURE

TEMPERATURE (°C)

0.1

0.3

0.2

0.5

0.4

0.6

0.7

0.8

-20

0

20 40 60 80 100 120 140

E

C

B

A

D

APPLICATION CIRCUIT

SHUTDOWN CURRENT:

A: V+ = +15V

B: V+ = +10V

C: V+ = +4V

MAX1626 SHUTDOWN

CURRENT:

D: V+ = +16V

E: V+ = +4V

400

0

0

2000

4000

EXT RISE AND FALL TIMES

vs. CAPACITANCE

50

100

300

250

350

CAPACITANCE (pF)

200

150

50

0

-60 -40 -20

40 60

140

EXT RISE AND FALL TIMES

vs. TEMPERATURE

10

5

15

40

35

45

TEMPERATURE (°C)

0

20

80

25

20

30

100 120

3/5 = 0V

60

-60 -40

MAX1626

V+ QUIESCENT CURRENT

vs. TEMPERATURE

TEMPERATURE (°C)

62

64

66

68

70

72

-20

0

20 40 60 80 100 120 140

3/5 = 0V

OUT FORCED TO 3.4V

V+ = +16V

V+ = +10V

V+ = +4V

12

0

0

1234

5

MAX1626 EXT OFF TIME

vs. OUTPUT VOLTAGE

2

8

10

OUTPUT VOLTAGE (V)

6

4

V+ = +5V

3/5 = GND

3/5 = V+

12

0

0

0.2

0.4

0.6

0.8

1.0

1.2

1.4

MAX1627 EXT OFF TIME

vs. FB PIN VOLTAGE

2

8

10

FB PIN VOLTAGE (V)

6

4

V+ = +5V

115

85

-60 -40 -20 0

20 40 60 80 100 120 140

CS TRIP LEVEL vs. TEMPERATURE

90

105

110

TEMPERATURE (°C)

100

95

OUT = 0V