Typical operating characteristics (continued) – Rainbow Electronics MAX17000 User Manual
Page 9
MAX17000
Complete DDR2 and DDR3 Memory
Power-Management Solution
_______________________________________________________________________________________
9
STARTUP WAVEFORM
(HEAVY LOAD)
MAX17000 toc09
200
μs/div
PGOOD1
SHDN : 5V/div
VDDQ : 500mV/div
VTT : 500mV/div
VTTR : 500mV/div
PGOOD1 : 2V/div
I
LX
: 5A/div
DL : 5V/div
R
LOAD
= 0.25
Ω
SKIP = GND
VTTR
VTT
VDDQ
DL
I
LX
SHDN
SHUTDOWN WAVEFORM
(DISCHARGE MODE ENABLED)
MAX17000 toc10
400
μs/div
DL
PGOOD2 : 5V/div
PGOOD1 : 5V/div
SHDN : 10V/div
I
LX
: 2A/div
DL : 5V/div
VDDQ : 2V/div
VTT : 1V/div
VTTR : 1V/div
VTTR
VTT
VDDQ
PGOOD1
PGOOD2
I
LX
SHDN
STANDBY TRANSITION WAVEFORM
MAX17000 toc11
2ms/div
DL
TON
DL : 5V/div
LX : 10V/div
I
LX
: 2A/div
STBY : 5V/div
VDDQ : 1V/div
VTT : 1V/div
TON: 10V/div
VTT
VDDQ
I
LX
LX
STBY
STANDBY TRANSITION WAVEFORM
MAX17000 toc12
200
μs/div
DL
TON
LX : 10V/div
I
LX
: 10A/div
DL : 5V/div
STBY : 5V/div
VDDQ : 2V/div
VTT : 1V/div
TON: 10V/div
VTT
VDDQ
I
LX
LX
STBY
SMPS LOAD-TRANSIENT RESPONSE
(SKIP MODE)
MAX17000 toc13
20
μs/div
I
LOAD
: 5A/div
I
LX
: 5A/div
VDDQ : 50mV/div
LX : 10V/div
VDDQ
I
LX
I
LOAD
LX
SMPS LOAD-TRANSIENT RESPONSE
(SKIP MODE)
MAX17000 toc14
20
μs/div
I
LOAD
: 5A/div
I
LX
: 5A/div
VDDQ : 50mV/div
LX : 10V/div
VDDQ
I
LX
I
LOAD
LX
Typical Operating Characteristics (continued)
(MAX17000 Circuit of Figure 1, V
IN
= 12V, V
DD
= V
CC
= 5V, SKIP = GND, T
A
= +25°C, unless otherwise noted.)