Rainbow-electronics MAX8720 Manuel d'utilisateur télécharger pdf (Page 21)

MAX8720

Dynamically Adjustable 6-Bit VID

Step-Down Controller

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HIGH VID VOLTAGE

LOW VID VOLTAGE

PGOOD

SUS

SKIP

HIGH IMPEDANCE HIGH IMPEDANCE

MODE FORCED-PWM FORCED-PWMPWM MODE PWM MODE

LOW VIDHIGH VID HIGH VIDD0-D5

PWM MODE

OUT

SLEW RATE SET BY R

TIME

8x R

TIME

CLOCKS

8x R

TIME

CLOCKS

Figure 8. VID Transition in Forced-PWM Mode (

SKIP

= High)

HIGH VID VOLTAGE

LOW VID VOLTAGE

PGOOD

SUS

SKIP

MODE FORCED-PWM FORCED-PWMSKIP MODE SKIP MODE

LOW VIDHIGH VID HIGH VIDD0-D5

SKIP MODE

HIGH IMPEDANCE HIGH IMPEDANCELOW T'HOLD ONLY LOW THRESHOLD ONLY

OUT

SLEW RATE SET BY R

TIME

8x R

TIME

CLOCKS

8x R

TIME

CLOCKS

LOW T'HOLD ONLY

Figure 9. VID Transition in Pulse-Skipping Mode (

SKIP

= GND)

1 2 ... 16 17 18 19 20 21 22 23 24 25 26 ... 30 31

Step-Down Controller 1

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Rainbow-electronics MAX8720 Manuel d'utilisateur Page 21

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