參數(shù)資料
型號(hào): NCP5214A
廠商: ON SEMICONDUCTOR
英文描述: 2−in−1 Notebook DDR Power Controller
文件頁(yè)數(shù): 18/31頁(yè)
文件大小: 376K
代理商: NCP5214A
NCP5214A
http://onsemi.com
18
VCCA
VDDQEN
VTTEN
VTTEN is
Don’t Care
in S5
VDDQ
VDDQ
Softstart
VTT
VTT in HZ
VTT Softstart
VTT Softstart
PGOOD
Operating
Mode
t
hold
200 s
S5
S0
S3
S0
S5
VCCA goes
above 4.0 V to
enable the IC.
VDDQEN goes HIGH,
VDDQ and VTTREF
are enabled but not
activated until VIN
goes above threshold
of 3.0 V. VTTEN goes
HIGH, VTT is enabled
but not activated until
VDDQ is good.
VTTEN goes LOW
to activate S3 mode
and to turn off VTT.
Both VDDQEN and
VTTEN go LOW to
trigger S5 mode;
VDDQ, VTT, VTTREF
are disabled, then
INREGDDQ and
PGOOD goes LOW.
PGOOD
goes HIGH.
INREGDDQ goes
HIGH, VTT goes into
normal mode.
VTTEN goes
HIGH, VTT goes
into normal mode.
Figure 38. Powerup and Powerdown Timing Diagram
VIN
(VOCDDQ)
VTTREF
VIN goes above the
threshold, the VDDQ
and VTTREF go into
normal mode.
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