MAX1771 データシートの表示（PDF） - Maxim Integrated

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MAX1771

12V or Adjustable, High-Efficiency, Low IQ, Step-Up DC-DC Controller

Maxim Integrated 

12V or Adjustable, High-Efficiency,

Low IQ, Step-Up DC-DC Controller

____________________________Typical Operating Characteristics (continued)

(Circuit of Figure 2a, TA = +25°C, unless otherwise noted.)

HEAVY-LOAD SWITCHING WAVEFORMS

VOUT

A

0V

B

ILIM

0A

C

2µs/div

VIN = 5V, IOUT = 900mA, VOUT = 12V

A: EXT VOLTAGE, 10V/div

B: INDUCTOR CURRENT, 1A/div

C: VOUT RIPPLE, 50mV/div, AC-COUPLED

LINE-TRANSIENT RESPONSE

A

7V

5V

0V

B

5ms/div

IOUT = 700mA, VOUT = 12V

A: VIN, 5V to 7V, 2V/div

B: VOUT RIPPLE, 100mV/div, AC-COUPLED

MEDIUM-LOAD SWITCHING WAVEFORMS

A

VOUT

0V

ILIM

B

0A

C

10µs/div

VIN = 5V, IOUT = 500mA, VOUT = 12V

A: EXT VOLTAGE, 10V/div

B: INDUCTOR CURRENT, 1A/div

C: VOUT RIPPLE, 50mV/div, AC-COUPLED

LOAD-TRANSIENT RESPONSE

500mA

A

0A

B

5ms/div

VIN = 6V, VOUT = 12V

A: LOAD CURRENT, 0mA to 500mA, 500mA/div

B: VOUT RIPPLE, 100mV/div, AC-COUPLED

_______________________________________________________________________________________ 5

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