Rainbow-electronics MAX1813 Manual do Utilizador descarregar pdf (Página 11)

MAX1813

Dynamically-Adjustable, Synchronous Step-Down

Controller with Integrated Voltage Positioning

______________________________________________________________________________________ 11

200µs/div

STARTUP WAVEFORM

(HEAVY LOAD)

1.6V

MAX1813 toc21

20A

A. V

SKP/SDN

= 0 TO 1.6V, 2V/div

B. PGOOD, 5V/div

C. V

OUT

= 1.4V, R

OUT

= 63mΩ, 1V/div

D. INDUCTOR CURRENT, 20A/div

1.4V

200

µs/div

STARTUP WAVEFORM

(NO LOAD, PWM MODE)

1.6V

MAX1813 toc22

10A

A. V

SKP/SDN

= 0 TO 1.6V, 2V/div

B. PGOOD, 5V/div

C. V

OUT

= 1.4V, NO LOAD, 1V/div

D. INDUCTOR CURRENT, 10A/div

1.4V

200

µs/div

STARTUP WAVEFORM

(NO LOAD, SKIP MODE)

MAX1813 toc23

10A

A. V

SKP/SDN

= 0 TO 5V

B. PGOOD, 5V/div

C. V

OUT

= 1.4V, NO LOAD, 1V/div

D. INDUCTOR CURRENT, 10A/div

1.4V

µs/div

SHUTDOWN WAVEFORM

1.6V

MAX1813 toc24

1.4V

20A

A. V

SKP/SDN

= 0 TO 1.6V, 2V/div

B. PGOOD, 5V/div

C. V

OUT

= 1.4V, R

OUT

= 63mΩ, 1V/div

D. INDUCTOR CURRENT, 20A/div

Typical Operating Characteristics (continued)

(Circuit from Figure 1, components from Table 2, T

= +25°C, unless otherwise noted.)

1 2 ... 6 7 8 9 10 11 12 13 14 15 16 ... 37 38

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