MAX744ACWE 参数 Datasheet PDF下载

5V, Step-Down,

Current-Mode PWM DC-DC Converters

____________________________Typical Operating Characteristics (continued)

(Circuit of Figure 3, T

A

= +25°C, unless otherwise noted.)

MAX730A/MAX738A/MAX744A

OSCILLATOR FREQUENCY vs.

SUPPLY VOLTAGE

220

(

NOTE 3)

MAX730A

OSCILLATOR FREQUENCY

vs. TEMPERATURE

240

220

200

180

160

140

V+ = 11.0V

(NOTE 4)

210

OSCILLATOR FREQUENCY (kHz)

200

190

MAX744A

180

170

160

150

4

6

8

10

12

SUPPLY VOLTAGE (V)

14

16

OSCILLATOR FREQUENCY (kHz)

MAX730A

V+ = 5.5V

V+ = 7.0V

V+ = 9.0V

MAX738A

0

-60 -40 -20 0

20 40 60 80 100 120 140 160

TEMPERATURE (°C)

MAX738A

OSCILLATOR FREQUENCY

vs. TEMPERATURE

200

(NOTE 4)

190

SUPPLY CURRENT (mA)

180

170

160

150

140

130

120

-60 -40 -20 0

20 40 60 80 100 120 140 160

TEMPERATURE (°C)

V+ = 12.0V

V+ = 9.0V

V+ = 16.0V

OSCILLATOR FREQUENCY (kHz)

V+ = 6.0V

200

210

MAX744A

OSCILLATOR FREQUENCY

vs. TEMPERATURE

(NOTE 4)

V+ = 6.0V

V+ = 16.0V

190

V+ = 9.0V

180

V+ = 12.0V

170

-60 -40 -20 0

20 40 60 80 100 120 140 160

TEMPERATURE (°C)

Note 3:

Commercial temperature range external component values in Table 3.

Note 4:

Wide temperature range external component values in Table 3.

Note 5:

Standby and shutdown current includes all external component leakage currents. Capacitor leakage currents dominate at T > +85°C,

A

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.

_______________________________________________________________________________________

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