MAX730A Ver la hoja de datos (PDF) - Maxim Integrated

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MAX730A

5V, Step-Down, Current-Mode PWM DC-DC Converters

Maxim Integrated 

5V, Step-Down,

Current-Mode PWM DC-DC Converters

____________________________Typical Operating Characteristics (continued)

(Circuit of Figure 3, TA = +25°C, unless otherwise noted.)

MAX738A/MAX744A

SWITCHING WAVEFORMS,

CONTINUOUS CONDITION

MAX738A/MAX744A

SWITCHING WAVEFORMS,

DISCONTINUOUS CONDITION

2µs/div

A: SWITCH VOLTAGE (LX PIN), 5V/div, 0V TO +12V

B: INDUCTOR CURRENT, 200mA/div

C: OUTPUT VOLTAGE RIPPLE, 50mV/div, AC-COUPLED

COUT = 390µF,

V+ = 12V, IOUT = 150µA,

12V

A

0V

200mA B

0mA

C

2µs/div

A: SWITCH VOLTAGE (LX PIN), 5V/div, 0V TO +12V

B: INDUCTOR CURRENT, 200mA/div

C: OUTPUT VOLTAGE RIPPLE, 50mV/div, AC-COUPLED

COUT = 390µF,

V+ = 12V, IOUT = 150µA

12V

A

0V

200mA

B

0mA

C

MAX730A LINE-TRANSIENT RESPONSE

MAX738A/MAX744A LINE-TRANSIENT RESPONSE

100ms/div

A: VOUT, 50mV/div, DC-COUPLED

B: V+, 5V/div, 6.0V TO 11.0V

IOUT = 300mA

A

11V

B

6V

0V

100ms/div

A: VOUT, 50mV/div, DC-COUPLED

B: V+, 5V/div, 10.2V TO 16.0V

IOUT = 750mA

A

16V

B

10.2V

0V

6 _______________________________________________________________________________________

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