5V, Step-Down,

Current-Mode PWM DC-DC Converters

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5

____________________________Typical Operating Characteristics (continued)

46

8

10

14

SUPPLY VOLTAGE (V)

OSCILLATOR FREQUENCY vs.

SUPPLY VOLTAGE

12

16

MAX744A

MAX738A

MAX730A

(

NOTE 3)

220

170

160

150

180

190

200

210

210

190

180

-60

20 40

80

120

TEMPERATURE (°C)

MAX744A

OSCILLATOR FREQUENCY

vs. TEMPERATURE

200

170

-40 -20 0

60

100

140 160

V+ = 6.0V

V+ = 16.0V

V+ = 9.0V

V+ = 12.0V

(NOTE 4)

200

180

170

160

-60

20 40

80

120

TEMPERATURE (°C)

MAX738A

OSCILLATOR FREQUENCY

vs. TEMPERATURE

190

140

-40 -20 0

60

100

140 160

150

130

120

V+ = 6.0V

V+ = 16.0V

V+ = 12.0V

V+ = 9.0V

(NOTE 4)

-60

20 40

80

120

TEMPERATURE (°C)

MAX730A

OSCILLATOR FREQUENCY

vs. TEMPERATURE

-40 -20 0

60

100

140 160

240

200

180

160

220

0

140

V+ = 9.0V

V+ = 7.0V

(NOTE 4)

V+ = 5.5V

V+ = 11.0V

Note 3: Commercial temperature range external component values in Table 3.

Note 4: Wide temperature range external component values in Table 3.

Sanyo OS-CON capacitors were used.

Note 6: Operation beyond the specifications listed in the electrical characteristics may exceed the power dissipation ratings of the device.