4.5V to 28V Input, Synchronous PWM Buck Controllers

for DDR Termination and Point-of-Load Applications

_______________________________________________________________________________________

9

Typical Operating Characteristics (continued)

°C, unless otherwise noted.)

LOAD TRANSIENT 0A TO 20A TO 0A

(CIRCUIT OF FIGURE 1)

MAX8553/4 toc10

40

µs/div

10A/div

100mV/div

AC-COUPLED

LOAD TRANSIENT -8A TO +8A TO -8A

(CIRCUIT OF FIGURE 2)

MAX8553/4 toc11

40

µs/div

VTT CONNECTED TO THE OUTPUT

0

5A/div

20mV/div

AC-COUPLED

LOAD TRANSIENT -8A TO +8A TO -8A

(CIRCUIT OF FIGURE 2)

MAX8553/4 toc12

40

µs/div

VTT CONNECTED AS SHOWN IN FIGURE 2

0

5A/div

20mV/div

AC-COUPLED

SWITCHING WAVEFORMS WITH 20A LOAD

(CIRCUIT OF FIGURE 1)

MAX8553/4 toc13

2

µs/div

10A/div

0

5V/div

20mV/div

AC-COUPLED