參數(shù)資料
型號(hào)： LTC2908
廠商： Linear Integrated Systems
英文描述： Precision Six Supply Monitor
中文描述： 精密六電源監(jiān)視器
文件頁(yè)數(shù)： 3/16頁(yè)
文件大小： 171K
代理商： LTC2908
3
LTC2908
sn2908 2908fs
SYMBOL
V
CC
I
V1
PARAMETER
Internal Operating Voltage
V1 Input Current
CONDITIONS
RST in Correct Logic State
V1 = 5.0V (LTC2908-A1) (Note 4)
V1 = 3.3V (LTC2908-B1)
V2 = 3.3V (LTC2908-A1) (Note 4)
V2 = 2.5V (LTC2908-B1)
V3 = 2.5V (LTC2908-A1)
V3 = 1.8V (LTC2908-B1)
V4 = 1.8V (LTC2908-A1)
V4 = 1.5V (LTC2908-B1)
V
ADJ1
= V
ADJ2
= 0.55V
MIN
0.5
TYP
MAX
6
50
50
20
20
5
5
5
5
±
15
260
UNITS
●
V
●
●
26
24
10
8
2
2
2
2
μ
A
μ
A
μ
A
μ
A
μ
A
μ
A
μ
A
μ
A
nA
ms
μ
s
I
V2
V2 Input Current
●
●
I
V3
V3 Input Current
●
●
I
V4
V4 Input Current
●
●
I
VADJ
t
RST
t
UV
V
ADJ1
, V
ADJ2
Input Current
Reset Time-Out Period
V
X
Undervoltage Detect to RST or RST
●
●
160
200
250
V
X
Less Than Reset Threshold V
RTX
by
More Than 1%
I
RST
= –1
μ
A, V
CC
= 5V (LTC2908-A1)
I
RST
= –1
μ
A, V
CC
= 3.3V (LTC2908-B1)
V
CC
= 0.5V, I
RST
= 5
μ
A
V
CC
= 1.0V, I
RST
= 100
μ
A
V
CC
= 3.0V, I
RST
= 2500
μ
A
V
OH
Output Voltage High RST (Note 5)
●
●
V
CC
– 1.5
V
CC
– 1.0
V
V
V
V
V
V
OL
Output Voltage Low RST
●
●
●
0.01
0.01
0.10
0.15
0.15
0.30
The
●
denotes specifications which apply over the full operating
temperature range, otherwise specifications are T
A
= 25
°
C. V
CC
= 5V for the LT2908-A1 and V
CC
= 3.3V for the LTC2908-B1, unless
otherwise noted. (Notes 2, 3)
ELECTRICAL CHARACTERISTICS
Note 1:
Absolute Maximum Ratings are those values beyond which the life
of a device may be impaired.
Note 2:
The greater of V1, V2 is the internal supply voltage (V
CC
).
Note 3:
All currents into pins are positive; all voltages are referenced to
GND unless otherwise noted.
Note 4:
Under typical operating conditions, most of the quiescent current
is drawn from the V1 input. When V2 exceeds V1, V2 supplies most of the
quiescent current.
Note 5:
The output pin RST has an internal pull-up to V
CC
of typically 6
μ
A.
However, an external pull-up resistor may be used when a faster rise time
is required or for V
OH
voltages greater than V
CC
.
TYPICAL PERFOR U
Specifications are at T
A
= 25
°
C unless otherwise noted.
5V Threshold Voltage
vs Temperature
3.3V Threshold Voltage
vs Temperature
2.5V Threshold Voltage
vs Temperature
TEMPERATURE (
°
C)
–50
4.750
4.725
4.700
4.675
4.650
4.625
4.600
25
75
2908 G01
–25
0
50
100
T
R
TEMPERATURE (
°
C)
–50
3.135
3.115
3.095
3.075
3.055
3.035
25
75
2908 G02
–25
0
50
100
T
R
TEMPERATURE (
°
C)
–50
2.375
2.360
2.345
2.330
2.315
2.300
25
75
2908 G03
–25
0
50
100
T
R
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