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LT3505IDD-PBF Datasheet(PDF) 6 Page - Linear Technology

Part # LT3505IDD-PBF
Description  1.2A, Step-Down Switching Regulator in 3mm 횞 3mm DFN
Download  24 Pages
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Manufacturer  LINER [Linear Technology]
Direct Link  http://www.linear.com
Logo LINER - Linear Technology

LT3505IDD-PBF Datasheet(HTML) 6 Page - Linear Technology

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LT3505
6
3505fc
TYPICAL PERFORMANCE CHARACTERISTICS
Switch Current Limit
Typical Minimum On Time
RT Pin Bias Voltage
Operating Waveforms
Operating Waveforms,
Discontinuous Mode
TEMPERATURE (
°C)
–50
1.0
1.1
1.3
1.4
1.5
2.0
1.7
0
25
100 125
1.2
1.8
1.9
1.6
–25
50
75
Switch Current Limit, RT = 75.0k
TEMPERATURE (
°C)
–50
80
120
125
40
0
0
50
100
–25
25
75
160
60
100
20
140
Switching Frequency
Switching Frequency
TEMPERATURE(
°C)
–50
495
500
505
25
75
125
490
485
480
–25
0
50
100
VFB = 0.78V
RT PIN BIAS CURRENT (µA)
0
0
0.5
1.5
2.0
2.5
20
35
3.0
1.0
10
30
5
25
15
TA = 25°C
RT PIN RESISTANCE (kΩ)
10
0.1
1
100
3505 G24
TA = 25°C
VSW
5V/DIV
IL
0.5A/DIV
0
VOUT
20mV/DIV
VIN = 12V
VOUT = 3.3V
IOUT = 0.5A
L = 10
µH
COUT = 10µF
RT = 75.0k
1
µs/DIV
3505 G18
VSW
5V/DIV
IL
0.5A/DIV
0
VOUT
20mV/DIV
1
µs/DIV
3505 F26
VIN = 12V
VOUT = 3.3V
IOUT = 50mA
L = 10
µH
COUT = 10µF
RT = 75.0k
DUTY CYCLE (%)
1.2
1.4
1.6
1.8
1.3
1.5
1.7
20
40
60
80
3505 G20
100
0
30
50
70
90
10
TA = 25°C


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