ncp5203 ON Semiconductor, ncp5203 Datasheet - Page 9

• Manufacturer Part Number: ncp5203
• Description: 2-in-1 Ddr Power Controller
• Manufacturer: ON Semiconductor

PGOOD
OPERATING
MODE
5VDUAL
VDDQEN
VTTEN
VDDQ
VTT
5VDUAL
comes out
of UVLO
VDDQEN goes
HIGH, VDDQ is
activated. VTTEN
goes HIGH, VTT is
not activated until
VDDQ is Good.
S5
10ms
Start
Soft
INREGDDQ goes HIGH,
VTT goes into normal mode.
INREGVTT goes HIGH.
Figure 3. Powerup and Powerdown Timing Diagram
t
PGOOD goes HIGH.
hold
200 ms
S0
http://onsemi.com
VTTEN goes LOW to
activate S3 mode and
to turn off VTT, then
INREGVTT goes LOW,
PGOOD goes LOW.
NCP5203
9
VTT in H−Z
S3
VTTEN goes HIGH,
VTT goes into
normal mode.
INREGVTT
goes HIGH.
PGOOD goes
HIGH.
t
hold
S0
200 ms
Both VDDQEN and
VTTEN go LOW to
trigger S5 mode; VDDQ
and VTT is disabled,
then INREGDDQ and
INREGVTT go LOW,
PGOOD goes LOW.
VTTEN IS
DON’T CARE
IN S5
S5