LTC1326 查看數據表（PDF） - Linear Technology
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LTC1326 Datasheet PDF : 16 Pages
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LTC1326/LTC1326-2.5
TYPICAL APPLICATIONS N
Monitoring a Negative Supply
3.3V
5V
R2
150k
1%
Q1
2N3906
Q3
2N3904
R4
392k
1%
–5V
R1
150k
1%
Q2
2N3906
VCCA
R3
100k
1%
C1
0.1µF
C2
0.1µF
LTC1326
1
VCC3
2
VCC5
3
VCCA
4
GND
8
PBR
7
SRST
6
RST
5
RST
SYSTEM RESET
R4 ≈ (100k)(0.98)(VTRIP + 0.55)(–1)
SUPPLY
VTRIP
R4
– 5V
– 4.6V
392k
– 3.3V
– 3V
237k
– 12V
– 10.8V
1M
1326/2.5 TA12
3.3V
ADJUSTABLE
SUPPLY
2.5V
R1
R2
LTC1326-2.5
1
VCC3
2
VCC25
3
VCCA
4
GND
8
PBR
7
SRST
6
RST
5
RST
Reset Valid for VCC3 Down to 0V
100k
SYSTEM RESET
1326/2.5 TA13
3.5
VCC3 = VCC25 = VCCA
3.0 TA = 25°C
2.5 RST OUTPUT WITH
2.0 100k PULL-UP TO VCC3
1.5
1.0
0.5
0
0
RST OUTPUT
WITHOUT
100k PULL-UP.
10M LOAD TO GND
0.5 1.0 1.5 2.0 2.5 3.0 3.5
VCC3 (V)
1326/2.5 TA13a
132625fc
13
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