LT1534C View Datasheet(PDF) - Linear Technology
Part Name
Description
MFG CO.
'LT1534C' PDF : 16 Pages View PDF
LT1534/LT1534-1
TYPICAL PERFORMANCE CHARACTERISTICS
Minimum Input Voltage (VIN)
vs Temperature
2.70
2.65
2.60
2.55
2.50
2.45
–50 –25 0 25 50 75 100 125 150
JUNCTION TEMPERATURE (°C)
1534 G01
Change in Maximum Switch
Current (ILIM) vs Duty Cycle
0
–100
– 200
– 300
125°C
25°C
85°C
– 400
– 500
– 600
0
20
40
60
80
100
DUTY CYCLE (%)
1533 G02
Output Switch Saturation Voltage
vs Switch Current
0.8
0.7
150°C
0.6
85°C
0.5
25°C
0.4
– 40°C
0.3
0.2
0.1
0
0
0.5
1.0
1.5
2.0
SWITCH CURRENT (A)
1534 G03
Feedback Voltage and
Input Current vs Temperature
1.30
2.0
1.29
1.8
1.28
1.6
1.27
1.4
1.26
1.2
VFB
1.25
1.0
1.24
0.8
1.23
0.6
IFB
1.22
0.4
1.21
0.2
1.20
0
–50 –25 0 25 50 75 100 125 150
TEMPERATURE (°C)
1533 G04
Negative Feedback Voltage and
Input Current vs Temperature
–2.30
35
–2.35
–2.40
–2.45
30
VNFB
–2.50
25
–2.55
–2.60
–2.65
20
INFB
–2.70
–50 –25
15
0 25 50 75 100 125 150
TEMPERATURE (°C)
1533 G05
Error Amplifier Transconductance
vs Temperature
2000
1900 gm = ∆IVC/∆VFB
1800
1700
1600
1500
1400
1300
1200
1100
1000
–50 –25
0 25 50 75 100 125 150
TEMPERATURE (°C)
1534 G08
Switching Frequency vs
Feedback Pin Voltage
100
TA = 25°C
90
80
70
60
50
40
30
20
10
0
0 0.1 0.2 0.3 0.4 0.5 0.6
FEEDBACK PIN VOLTAGE (V)
1533 G06
Error Amplifier Output Current (VC)
500
400
–40°C
300
125°C
200
25°C
100
0
–100
–200
–300
–400
–500
–400 –300 –200 –100 0 100 200 300 400
FEEDBACK PIN VOLTAGE FROM NOMINAL (mV)
1534 G07
4
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