3A, 1MHz, DDR Memory Termination Supply
Typical Operating Characteristics (continued)
(Circuit of Figure 1, V
OUT
= 1.25V, for V
IN
= 5V: L = 1µH, R
TOFF
= 130kΩ; for V
IN
= 3.3V: L = 0.68µH, R
TOFF
= 73.2kΩ.)
LOAD-TRANSIENT RESPONSE
R
DROOP
12mΩ
MAX1809 toc09
MAX1809
LINE-TRANSIENT RESPONSE
MAX1809 toc10
V
OUT
(AC-COUPLED)
V
OUT
(AC-COUPLED)
50mV/div
V
IN
2V/div
50mV/div
0V
V(LX)
5V/div
I
OUT
5A/div
0A
0V
10µs/div
V
EXTREF
= 1.25V, V
IN
= 3.3V, I
OUT
= -2A to +2A to -2A
20µs/div
I
OUT
= 2A, V
IN
= 5V to 3.3V to 5V
SWITCHING WAVEFORMS (SOURCING)
MAX1809 toc11
SWITCHING WAVEFORMS (SINKING)
MAX1809 toc12
V
OUT
(AC-COUPLED)
V
OUT
(AC-COUPLED)
50mV/div
50mV/div
I(LX)
2A/div
0A
0V
0A
I(LX)
2A/div
V(LX)
5V/div
400ns/div
I
OUT
= 2A, V
IN
= 5V
0V
400ns/div
I
OUT
= -2A, V
IN
= 5V
V(LX)
5V/div
_______________________________________________________________________________________
5
MAXIM [ MAXIM INTEGRATED PRODUCTS ]
