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LT3505IMS8E Datasheet(PDF) 5 Page - Linear Technology

Part # LT3505IMS8E
Description  1.2A, Step-Down Switching Regulator in 3mm x 3mm DFN
Download  24 Pages
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Manufacturer  LINER [Linear Technology]
Direct Link  http://www.linear.com
Logo LINER - Linear Technology

LT3505IMS8E Datasheet(HTML) 5 Page - Linear Technology

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LT3505
5
3505fc
TYPICAL PERFORMANCE CHARACTERISTICS
Undervoltage Lockout
Switching Frequency
Frequency Foldback, RT = 75.0k
TEMPERATURE (
°C)
3.60
3.80
4.00
3505 G10
3.40
3.20
3.50
3.70
3.90
3.30
3.10
3.00
–25
–50
25
0
75
100 125
50
FB VOLTAGE (V)
0
0
0.1
0.2
0.3
0.4
0.2
0.4
0.6
0.8
3505 G12
0.5
0.6
0.1
0.3
0.5
0.7
TA = 25°C
Soft-Start
SHDN Pin Current
Typical Minimum Input Voltage,
(VOUT = 5V, fSW = 750kHz)
SHDN PIN VOLTAGE (V)
0
0
0.2
0.6
0.8
1.0
2.0
1.4
0.50
1 1.25
0.4
1.6
1.8
1.2
0.25
0.75
1.50 1.75 2
TA = 25°C
VSHDN (V)
0
30
40
50
16
3505 G14
20
10
25
35
45
15
5
0
4
2
8
6
12 14
18
10
20
TA = 25°C
LOAD CURRENT (mA)
1
6.0
6.2
6.4
6.6
6.8
10
100
1000
3505 G15
5.8
5.6
5.4
5.2
7.0
7.2
TO START
TO RUN
TA = 25°C
Typical Minimum Input Voltage,
(VOUT = 3.3V, fSW = 750kHz)
LOAD CURRENT (mA)
1
4.3
4.5
4.7
4.9
5.1
10
100
1000
4.1
3.9
3.7
3.5
5.3
5.5
TO START
TA = 25°C
TO RUN
Typical Minimum Input Voltage,
(VOUT = 3.3V, fSW = 2.2MHz)
LOAD CURRENT (mA)
1
3.5
5.0
5.5
10
100
1000
4.5
4.0
TO START
TO RUN
TA = 25°C
Typical Minimum Input Voltage,
(VOUT = 5V, fSW = 2.2MHz)
LOAD CURRENT (mA)
1
5.0
6.2
6.6
7.0
10
100
1000
5.8
5.4
6.0
6.4
6.8
5.6
5.2
TO START
TO RUN
TA = 25°C
TEMPERATURE (
°C)
0
0.60
0.80
1.20
1.40
1.60
100
2.40
1.00
50
25
–50 –25
75
125
1.80
2.00
2.20
RT = 21k
RT = 30.1k
RT = 75.0k


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