參數(shù)資料
型號: NCP303LSN41T1
廠商: ON SEMICONDUCTOR
元件分類: 電源管理
英文描述: 1-CHANNEL POWER SUPPLY SUPPORT CKT, PDSO5
封裝: SC-59, TSOT-23, TSOP-5
文件頁數(shù): 11/28頁
文件大?。?/td> 199K
代理商: NCP303LSN41T1
NCP302, NCP303
http://onsemi.com
19
Figure 41. Microprocessor Reset Circuit with Additional Hysteresis
2
1
NCP301
LSN27T1
3
VDD
GN-
D
Reset Output
Input
RH
RL
NCP301
LSN27T1
GN-
D
NCP303
LSN27T1
GN-
D
GN-
D
Reset
VDD
Microprocessor
5
CD
Comparator hysteresis can be increased with the addition of
resistor RH. The hysteresis equations have been simplified and
do not account for the change of input current Iin as Vin crosses
the comparator threshold. The internal resistance, Rin is simply
calculated using Iin = 0.26 mA at 2.6 V.
Vin Decreasing:
V
th +
R
H
R
in
) 1 V
DET
*
Vin Increasing:
V
th +
R
H
R
in RL
) 1 V
DET
* ) VHYS
VHYS = Vin Increasing Vin Decreasing
Test Data
Vth Decreasing
(V)
Vth Increasing
(V)
VHYS
(V)
RH
(
W)
RL
(k
W)
2.70
2.84
2.87
2.88
2.91
2.90
2.94
2.98
2.70
3.04
3.15
0.135
0.17
0.19
0.21
0.20
0.24
0.28
0.27
0.34
0.35
0
100
220
470
10
6.8
4.3
10
6.8
4.3
10
6.8
4.3
Figure 42. Simple Clock Oscillator
NCP301
LSN27T1
GN-
D
Reset Output
Input
82 k
NCP301
LSN27T1
GN-
D
NCP302
HSN27T1
GN-
D
C
5.0 V
100 k
C (
mF)
fOSC (kHz)
IQ (mA)
0.01
2590
21.77
0.1
490
21.97
1.0
52
22.07
Test Data
5
CD
2
3
1
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