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WM8321 데이터시트(PDF) 22 Page - Wolfson Microelectronics plc

부품명 WM8321
상세설명  Processor Power Management Subsystem
PDF  253 Pages
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제조업체  WOLFSON [Wolfson Microelectronics plc]
홈페이지  http://www.wolfsonmicro.com
Logo WOLFSON - Wolfson Microelectronics plc

WM8321 데이터시트(HTML) 22 Page - Wolfson Microelectronics plc

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WM8321
Production Data
w
PD, February 2012, Rev 4.0
22
7.3
RESET THRESHOLDS
Unless otherwise noted: TJ = -40°C to +125°C; Typical values are at TJ = +25ºC
PARAMETER
SYMBOL
TEST CONDITIONS
MIN
TYP
MAX
UNIT
Power On Reset
Power on Reset threshold
VPMIC (LDO12VOUT) voltage
at which device transitions
between NO POWER and
BACKUP states
VPOR, DE-
ASSERT
VPMIC rising
1.18
V
VPOR, ASSERT
VPMIC falling
1.08
V
Power on Reset hysteresis
VPOR, HYST
100
mV
Device Reset Control
Device Reset threshold
VPMIC (LDO12VOUT) voltage
at which device transitions
between BACKUP and OFF
states
VRES, DE-
ASSERT
VPMIC rising
1.89
V
VRES, ASSERT
VPMIC falling
1.80
V
Device Reset hysteresis
VRES, HYST
90
mV
Device Shutdown
Shutdown threshold
PVDD voltage at which the
device forces an OFF transition
VSHUTDOWN
PVDD falling
2.7
V
SYSLO threshold accuracy
PVDD voltage at which SYSLO
is asserted.
VSYSLO
PVDD falling,
VSYSLO set by SYSLO_THR
(2.8V to 3.5V)
-3
+3
%
SYSOK threshold accuracy
PVDD voltage at which SYSOK
is asserted.
VSYSOK
PVDD rising,
VSYSOK set by SYSOK_THR
(2.8V to 3.5V)
Note the SYSOK hysteresis
margin (VSYSOK, HYST) is added
to SYSOK_THR.
-3
+3
%
SYSOK hysteresis
VSYSOK, HYST
40
mV
7.4
REFERENCES
Unless otherwise noted: TJ = +25ºC
PARAMETER
SYMBOL
TEST CONDITIONS
MIN
TYP
MAX
UNIT
Voltage Reference
VVREFC
0.8
V
Current Reference
VIREFR
100k
 to GND
0.5
V



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