LTC1876 데이터 시트보기 (PDF) - Linear Technology
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LTC1876
Linear Technology
LTC1876 Datasheet PDF : 36 Pages
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LTC1876
TYPICAL PERFOR A CE CHARACTERISTICS
EXTVCC and Switch Resistance vs
Temperature
10
8
6
4
2
0
–50 –25
0 25 50 75
TEMPERATURE (°C)
100 125
1876 G19
Shutdown Latch Thresholds vs
Temperature
4.5
4.0
LATCH ARMING
3.5
3.0
LATCHOFF
THRESHOLD
2.5
2.0
1.5
1.0
0.5
0
–50 –25
0 25 50 75
TEMPERATURE (°C)
100 125
1876 G22
Feedback Pin Voltage (AUXVFB)
1.28
1.27
1.26
1.25
1.24
1.23
1.22
–50 –25 0
25 50
TEMPERATURE (°C)
75 100
1876 G25
Oscillator Frequency vs
Temperature (Controller)
350
VFREQSET = 5V
300
250
VFREQSET = OPEN
200
150
VFREQSET = 0V
100
50
0
– 50 – 25
0 25 50 75
TEMPERATURE (°C)
100 125
1876 G20
Shutdown Pin Current (IAUXVFB)
40
35
30
TA = 25°C
25
TA = 100°C
20
15
10
5
0
0
1
2
3
4
5
6
SHUTDOWN PIN VOLTAGE (V)
1876 G23
Current Limit for Auxillary
Regulator
1.6
1.4
1.2
1.0
0.8
0.6
0.4
0.2
0
10 20 30 40 50 60 70 80 90
DUTY CYCLE (%)
1876 G26
Undervoltage Lockout vs
Temperature (Controller)
3.50
3.45
3.40
3.35
3.30
3.25
3.20
–50 –25
0 25 50 75
TEMPERATURE (°C)
100 125
1876 G21
Quiescent Current for Auxillary
Regulator
4.6
VFB = 1.3V
4.5 NOT SWITCHING
4.4
4.3
4.2
4.1
4.0
VIN = 3.3V
VIN = 5V
3.9
3.8
3.7
3.6
–50
0
50
100
TEMPERATURE (°C)
1876 G24
Auxillary Regulator Switch
Oscillator Frequency
1.35
1.30
1.25
1.20
1.15
1.10
1.05
–50 –30 –10 10 30 50 70
TEMPERATURE (°C)
90 110
1876 G28
1876fa
7
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