LTC1553 Ver la hoja de datos (PDF) - Linear Technology
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LTC1553
Linear Technology
LTC1553 Datasheet PDF : 24 Pages
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TYPICAL PERFORMANCE CHARACTERISTICS
LTC1553
Oscillator Frequency
vs Temperature
350
340
330
320
310
300
290
280
270
260
250
–50 –25
0 25 50 75
TEMPERATURE (°C)
100 125
1553 G10
Maximum G1 Duty Cycle
vs Temperature
92
OSCILLATOR FREQUENCY = 300kHz
90
88
G1, G2 CAPACITANCE = 1100pF
86
2200pF
3300pF
84
82
5500pF
7700pF
80
78
– 50 – 25
0 25 50 75
TEMPERATURE (°C)
100 125
1553 G13
PVCC Supply Current
vs Gate Capacitance
70
PVCC = 12V
60 TA = 25°C
50
40
30
20
10
0
0
2000
4000
6000
8000
GATE CAPACITANCE (pF)
1553 G16
IMAX Sink Current
vs Temperature
220
210
200
190
180
170
160
150
–50 –25
0 25 50 75
TEMPERATURE (°C)
100 125
1553 G11
VCC Operating Supply Current
vs Temperature
1.2
VCC = 5V
1.1 fOSC = 300kHz
1.0
0.9
0.8
0.7
0.6
0.5
– 50 –25
0 25 50 75
TEMPERATURE (°C)
100 125
1553 G14
Soft Start Source Current
vs Temperature
–7
–8
–9
– 10
– 11
– 12
– 13
– 50 – 25
0 25 50 75
TEMPERATURE (°C)
100 125
1553 G12
VCC Shutdown Supply Current
vs Temperature
250
225
200
175
150
125
100
75
50
– 50 – 25
0 25 50 75
TEMPERATURE (°C)
100 125
1553 G15
Output Over Current Protection
3.0
2.5 Q1 CASE = 90°C, VOUT = 2.8V
Q1 = 2 × MTD20N03HDL
Q2 = 1 × MTD20N03HDL
2.0 RIMAX = 2.7k, RIFB = 20Ω,
SS CAP = 0.01µF
1.5
1.0
SHORT-CIRCUIT
CURRENT
0.5
0
02
4 6 8 10 12 14 16 18
OUTPUT CURRENT (A)
1553 G17
Transient Response
50mV/DIV
5A/DIV
100µs/DIV
1553 G18
5
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