MAX8732A 参数 Datasheet PDF下载

(Circuit of Figure 1 and Figure 2, no load on LDO5, LDO3, OUT3, OUT5, and REF, V+ = 12V, ON3 = ON5 = V

CC

,

SHDN

= V+,

R

CS

= 7mΩ, V

ILIM

_ = 0.5V, T

A

= +25°C, unless otherwise noted.)

3.3V OUTPUT SWITCHING FREQUENCY

vs. LOAD CURRENT (MAX8732A)

MAX8732A/3A/4A toc10

MAX8732A

5V OUTPUT SWITCHING

FREQUENCY vs. LOAD CURRENT

MAX8732A/3A/4A toc11

MAX8732A

3.3V OUTPUT SWITCHING

FREQUENCY vs. LOAD CURRENT

320

SWITCHING FREQUENCY (kHz)

PWM MODE

280

240

200

160

120

80

ULTRASONIC MODE

40

PFM MODE

0

10

0.001

0.01

0.1

LOAD CURRENT (A)

1

10

V

IN

= 24V

MAX8732A/3A/4A toc12

360

320

SWITCHING FREQUENCY (kHz)

280

240

200

160

120

80

40

250

225

SWITCHING FREQUENCY (kHz)

200

175

150

125

100

75

50

25

0

ULTRASONIC MODE

PWM MODE

V

IN

= 7V

PWM MODE

V

IN

= 24V

360

ULTRASONIC MODE

PFM MODE

0.01

0.1

LOAD CURRENT (A)

1

10

PFM MODE

0.001

0.01

0.1

LOAD CURRENT (A)

1

0

0.001

MAX8733A

5V OUTPUT SWITCHING

FREQUENCY vs. LOAD CURRENT

MAX8732A/3A/4A toc13

MAX8733A

3.3V OUTPUT SWITCHING

FREQUENCY vs. LOAD CURRENT

MAX8732A/3A/4A toc14

MAX8733A

5V OUTPUT SWITCHING

FREQUENCY vs. LOAD CURRENT

V

IN

= 24V

400

SWITCHING FREQUENCY (kHz)

350

300

250

200

150

100

50

ULTRASONIC MODE

PFM MODE

0.001

0.01

0.1

LOAD CURRENT (A)

1

10

PWM MODE

MAX8732A/3A/4A toc15

MAX8732A/3A/4A toc18

450

400

SWITCHING FREQUENCY (kHz)

350

300

250

200

150

100

ULTRASONIC MODE

50

0

0.001

0.01

0.1

LOAD CURRENT (A)

1

PFM MODE

V

IN

= 7V

PWM MODE

550

500

SWITCHING FREQUENCY (kHz)

450

400

350

300

250

200

150

100

50

450

V

IN

= 7V

PWM MODE

ULTRASONIC MODE

PFM MODE

0.01

0.1

LOAD CURRENT (A)

1

10

10

0

0.001

0

MAX8733A

3.3V OUTPUT SWITCHING

FREQUENCY vs. LOAD CURRENT

MAX8732A/3A/4A toc16

MAX8732A

OUT5 VOLTAGE REGULATION

vs. LOAD CURRENT

ULTRASONIC

5.17

OUTPUT VOLTAGE (V)

5.15

5.13

5.11

5.09

FORCED-PWM

5.07

IDLE MODE

MAX8732A/3A/4A toc17

MAX8732A

OUT3 VOLTAGE REGULATION

vs. LOAD CURRENT

3.41

3.40

OUTPUT VOLTAGE (V)

3.39

3.38

3.37

3.36

3.35

3.34

IDLE MODE

FORCED-PWM

ULTRASONIC

550

500

SWITCHING FREQUENCY (kHz)

450

400

350

300

250

200

150

100

50

0

0.001

0.01

ULTRASONIC MODE

PFM MODE

0.1

LOAD CURRENT (A)

1

V

IN

= 24V

PWM MODE

5.19

10

5.05

0.001

0.01

0.1

LOAD CURRENT (A)

1

10

3.33

0.001

0.01

0.1

LOAD CURRENT (A)

1

10

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