LTC1553CSW Просмотр технического описания (PDF) - Linear Technology
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LTC1553CSW
Linear Technology
LTC1553CSW Datasheet PDF : 24 Pages
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LTC1553
TYPICAL PERFORMANCE CHARACTERISTICS
Typical 2.8V VOUT Distribution
140
TOTAL SAMPLE SIZE = 1500
120
100
80
25°C
60
100°C
40
20
0
2.775 2.785 2.795 2.805 2.815
OUTPUT VOLTAGE (V)
2.825
1553 G01
Line Regulation
2.825
2.820
2.815
2.810
REFER TO TYPICAL APPLICATION
CIRCUIT FIGURE 1
OUTPUT = NO LOAD
TA = 25°C
2.805
2.800
2.795
2.790
2.785
2.780
2.775
4.75 4.85 4.95 5.05 5.15 5.25
INPUT VOLTAGE (V)
1553 G04
Over-Temperature Driver Disable
vs Temperature
1.80
1.78
1.76
1.74
1.72
1.70
1.68
1.66
1.64
1.62
1.60
–50 –25
0 25 50 75 100 125
TEMPERATURE (°C)
1553 G07
Efficiency vs Load Current
100
90
A
80
B
70
60
50
40
30
20
10
0
0
0.3
REFER TO TYPICAL APPLICATION
CIRCUIT FIGURE 1
VIN = 5V, PVCC = 12V, VOUT = 2.8V,
COUT = 330µF × 7, LO = 2µH
A: Q1 = 1 × SUD50N03-10
Q2 = 1 × SUD50N03-10
B: Q1 = 2 × SUD50N03-10
Q2 = 1 × SUD50N03-10
NO FAN
Q1 IS MOUNTED ON 1IN2 COPPER AREA
2 4 6 8 10 12 14
LOAD CURRENT (A)
1533 G02
Output Temperature Drift
2.860
2.850
2.840
2.830
2.820
2.810
2.800
2.790
2.780
2.770
2.660
2.750
2.740
– 50 – 25
0 25 50 75
TEMPERATURE (°C)
100 125
1553 G05
Error Amplifier Transconductance
vs Temperature
2.3
2.1
1.9
1.7
1.5
1.3
1.1
0.9
– 50 –25
0 25 50 75
TEMPERATURE (°C)
100 125
1553 G08
Load Regulation
2.825
2.820
2.815
REFER TO TYPICAL APPLICATION
CIRCUIT FIGURE 1
VIN = 5V, PVCC = 12V, TA = 25°C
2.810
2.805
2.800
2.795
2.790
2.785
2.780
2.775
0 1 2 3 4 5 6 7 8 9 10 11 12 13 14
OUTPUT CURRENT (A)
1533 G03
Over-Temperature Trip Point
vs Temperature
2.12
2.10
2.08
2.06
2.04
2.02
2.00
1.98
1.96
1.94
1.92
1.90
– 50 – 25
0 25 50 75 100 125
TEMPERATURE (°C)
1553 G06
Error Amplifier Open-Loop
DC Gain vs Temperature
60
55
50
45
40
–50 –25
0 25 50 75
TEMPERATURE (°C)
100 125
1553 G09
4
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