LTC1174 查看數據表（PDF） - Linear Technology
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LTC1174 Datasheet PDF : 20 Pages
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LTC1174
LTC1174-3.3/LTC1174-5
TYPICAL PERFOR A CE CHARACTERISTICS
Line Regulation
6
4
ILOAD = 100mA
IPGM = 0V
2
0
–2
–4
–6
–8
–10
–12
–14
0 2 4 6 8 10
INPUT VOLTAGE (V)
12 14
1174 G07
Efficiency vs Input Voltage
95
VOUT = 5V
94
L = 100µH
COIL = CTX100-4
93
92
ILOAD = 300mA
IPGM = VIN
91
ILOAD = 100mA
IPGM = 0V
90
89
5 6 7 8 9 10 11 12 13 14
INPUT VOLTAGE (V)
1174 G10
Operating Frequency
vs VIN – VOUT
2.0
VOUT = 5V
1.5
TA = 25°C
1.0
TA = 70°C
0.5
0
0 1 2 3 4 5 6 7 89
(VIN – VOUT) VOLTAGE (V)
1174 G13
Switch Leakage Current
vs Temperature
180
160 VIN = 13.5V
140
120
100
80
60
40
20
0
0
20
40
60
80 100
TEMPERATURE (°C)
1174 G08
Supply Current in Shutdown
1.8
1.6 SHUTDOWN = 0V
TA = 25°C
1.4 CURRENT INTO PIN 6 ONLY
1.2
1.0
0.8
0.6
0.4
0.2
0
0 2 4 6 8 10 12 14
INPUT VOLTAGE (V)
1174 G11
Switch Resistance vs
Input Voltage
1.7
1.6
TA = 25°C
1.5
1.4
1.3
1.2
1.1
LTC1174HV
1.0
0.9
LTC1174
0.8
0.7
4 6 8 10 12 14 16 18 20
INPUT VOLTAGE (V)
1174 G14
Efficiency vs Input Voltage
95
94
93
L = 100µH
92
L = 50µH
91
90
89 VOUT = 5V
IPGM = 0V
88 ILOAD = 75mA
CORE = CTX (Kool Mµ®)
87
5 6 7 8 9 10 11 12 13 14
INPUT VOLTAGE (V)
1174 G09
DC Supply Current
500
450
ACTIVE MODE
IPGM = 0V
400
IPGM = VIN
350
300
250
200
150
SLEEP MODE
100
50 TA = 25°C
0
0 2 4 6 8 10 12 14
INPUT VOLTAGE (V)
1174 G12
Off-Time vs Output Voltage
50
40
30
20
LTC1174-5
LTC1174HV-5
10
LTC1174-3.3
0 LTC1174HV-3.3
0
1
2
3
4
5
OUTPUT VOLTAGE (V)
1174 G15
1174fe
5
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