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參數資料
| 型號： | LM1946M |
| 廠商： | NATIONAL SEMICONDUCTOR CORP |
| 元件分類： | 電源管理 |
| 英文描述： | LM1946 Over/Under Current Limit Diagnostic Circuit |
| 中文描述： | 1-CHANNEL POWER SUPPLY SUPPORT CKT, PDSO20 |
| 封裝： | 0.300 INCH, PLASTIC, SOP-20 |
| 文件頁數： | 2/12頁 |
| 文件大小： | 216K |
| 代理商： | LM1946M |
Absolute Maximum Ratings
If Military/Aerospace specified devices are required,
please contact the National Semiconductor Sales
Office/Distributors for availability and specifications.
Supply Voltage (V
CC
and Input Pins)
Survival Voltage (T
s
100 ms)
Operational Voltage
b
50V to
a
60V
9V to 26V
Internal Power Dissipation (Note 1)
Internally Limited
Output Short Circuit to Ground or V
CC
Operating Temperature Range (T
A
)
Maximum Junction Temperature
Continuous
b
40
§
C to
a
85
§
C
a
150
§
C
Storage Temperature Range
b
65
§
C to
a
150
§
C
Lead Temperature (Soldering, 10 sec.)
a
260
§
C
600V
ESD Susceptibility (Note 3)
Electrical Characteristics
9V
s
V
CC
s
16V, Iset
e
20
m
A, T
j
e
25
§
C (unless otherwise specified)
Parameter
Conditions
Min
Typ
Max
Units
Quiescent Current
All Outputs ‘‘Off’’
1.40
3.00
mA
dc
Reference Voltage
I
ref
e
10
m
A
5.8
6.4
7.0
V
dc
Reference Voltage
Line Regulation
9V
s
V
CC
s
16V, I
ref
e
10
m
A
g
5
g
50
mV
dc
Iset Voltage
Iset
e
20
m
A
1.20
1.40
1.60
V
dc
Input Offset Voltage
At Output Switch Point. V
O
e
2V
9V
s
V
CM
s
16V
g
1.0
g
5.0
mV
dc
Input Offset Current
I
IN(
a
)
b
I
IN(
b
)
, 9V
s
V
CM
s
16V
g
0.10
g
1.00
m
A
dc
Input Bias Current
I
IN(
a
)
or I
IN(
b
)
, 9V
s
V
CM
s
16V
18.00
20.00
22.00
m
A
dc
Input Common Mode
Voltage Range
4.00
26.0
V
dc
Maximum Positive
Input Transient
Either Input. T
s
100 ms
60
70
V
Maximum Negative
Input Transient
Either Input. T
s
100 ms
b
50
b
60
V
Output Saturation
Voltage
I
O
e
2 mA, 9V
s
V
CC
s
16V
0.80
1.00
V
dc
I
O
e
10 mA, 9V
s
V
CC
s
16V
1.00
1.20
V
dc
Output Short Circuit
Current
V
O
e
0V
dc
, Comparator ‘‘ON’’
20
45
120.0
mA
dc
Output Leakage Current
V
O
e
0V
dc
. Comparator ‘‘Off’’
0.01
1.00
m
A
dc
Test Threshold
Voltage
At Switch Point on Any Output
V
O
e
2V (Note 2)
0.80
1.25
2.00
V
dc
Test Threshold
Current
0.2
m
A
dc
Note 1:
Thermal resistance from junction to ambient is typically 53
§
C/W (board mounted).
Note 2:
The test pin is an active high input, i.e. all five will be forced high when this pin is driven high.
Note 3:
C
ESD
e
100 pF, R
ESD
e
1.5k
2
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