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LT3505EDD-PBF Datasheet(PDF) 4 Page - Linear Technology

Part # LT3505EDD-PBF
Description  1.2A, Step-Down Switching Regulator in 3mm3mm DFN
Download  24 Pages
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Manufacturer  LINER [Linear Technology]
Direct Link  http://www.linear.com
Logo LINER - Linear Technology

LT3505EDD-PBF Datasheet(HTML) 4 Page - Linear Technology

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LT3505
4
3505fc
TYPICAL PERFORMANCE CHARACTERISTICS
Efficiency (VOUT = 5V, L = 10µH,
fSW = 750kHz)
Efficiency (VOUT = 3.3V, L = 10µH,
fSW = 750kHz)
Efficiency (VOUT = 3.3V,
L = 4.7µH, fSW = 2.2MHz)
LOAD CURRENT (A)
0
50
55
65
70
75
0.8
1.0
95
60
0.2
0.4
0.6
1.2
80
85
90
VIN = 8V
VIN = 12V
VIN = 24V
TA = 25°C
LOAD CURRENT (A)
0
50
55
65
70
75
0.8
1.0
95
60
0.2
0.4
0.6
1.2
80
85
90
VIN = 8V
VIN = 12V
VIN = 24V
TA = 25°C
LOAD CURRENT (A)
0
50
55
65
70
75
0.8
1.0
95
60
0.2
0.4
0.6
1.2
80
85
90
VIN = 8V
VIN = 12V
TA = 25°C
Efficiency (VOUT = 5V, L = 4.7µH,
fSW = 2.2MHz)
LOAD CURRENT (A)
0
50
55
65
70
75
0.8
1.0
95
60
0.2
0.4
0.6
1.2
80
85
90
VIN = 8V
VIN = 12V
TA = 25°C
Max Load Current (VOUT = 3.3V,
L = 6.8µH, fSW = 750kHz)
INPUT VOLTAGE (V)
5
1.2
1.3
1.4
19
3505 G05
1.1
1.0
0.8
9
13
7
11
17
15
0.9
1.7
1.6
1.5
TYPICAL
MINIMUM
TA = 25°C
*10% DROPOUT
Max Load Current (VOUT = 5V,
fSW = 750kHz)
INPUT VOLTAGE (V)
6
0.8
0.9
1.1
1.2
1.3
22
1.7
3505 G06
1.0
14
10
26
18
8
24
16
12
28
20
30
1.4
1.5
1.6
TYPICAL, L = 22
µH
TYPICAL, L = 10
µH
MINIMUM, L = 10
µH
TA = 25°C
*10% DROPOUT
Max Load Current (VOUT = 3.3V,
L = 2.2µH, fSW = 2.2MHz)
INPUT VOLTAGE (V)
5
0.8
0.9
1.1
1.2
1.3
1.8
1.5
7
9
10
3505 G07
1.0
1.6
1.7
1.4
6
8
11
12
TYPICAL
MINIMUM
TA = 25°C
*10% DROPOUT
Max Load Current (VOUT = 5V,
L = 3.3µH, fSW = 2.2MHz)
INPUT VOLTAGE (V)
7
0.80
0.90
1.10
1.20
1.30
1.80
1.50
9
11
12
3505 G08
1.00
1.60
1.70
1.40
8
10
14
16
18
TYPICAL
MINIMUM
TA = 25°C
*10% DROPOUT
Switch Voltage Drop
SWITCH CURRENT (mA)
0
300
400
500
1200
3505 G09
200
100
250
350
450
150
50
0
300
600
900
1500
TA = –45°C
TA = 85°C
TA = 25°C


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