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LT3503 Datasheet(PDF) 4 Page - Linear Technology

Part # LT3503
Description  1A, 2.2MHz Step-Down Switching Regulator
PDF  20 Pages
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Manufacturer  LINER [Linear Technology]
Direct Link  http://www.linear.com
Logo LINER - Linear Technology

LT3503 Datasheet(HTML) 4 Page - Linear Technology

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4
LT3503
3503f
TYPICAL PERFOR A CE CHARACTERISTICS
Maximum Load Current
Switch Voltage Drop
Undervoltage Lockout
Switching Frequency
Frequency Foldback
Soft-Start
TA = 25°C unless otherwise noted.
SWITCH CURRENT (mA)
0
300
400
500
1200
3503 G07
200
100
250
350
450
150
50
0
300
600
900
1500
TA = –45°C
TA = 85°C
TA = 25°C
TEMPERATURE (
°C)
3.60
3.80
4.00
75
55
3503 G08
3.40
3.20
3.50
3.70
3.90
3.30
3.10
3.00
–25
–45
15
–5
35
TEMPERATURE (
°C)
–45
2.25
2.50
3503 G09
2.00
1.75
–5
35
55
2.75
–25
15
75
FEEDBACK VOLTAGE (mV)
0
1.5
2.0
2.5
300
500
800
3503 G10
1.0
0.5
0
100 200
400
600 700
SHDN PIN VOLTAGE (V)
0
0
0.2
0.6
0.8
1.0
2.0
1.4
0.50
1
1.25
3503 G11
0.4
1.6
1.8
1.2
0.25
0.75
1.50 1.75
2
INPUT VOLTAGE (V)
4
1.0
1.2
1.4
12
3503 G03
0.8
0.6
0
6
8
10
5
7
9
11
0.2
0.4
1.8
1.6
TYPICAL
MINIMUM
VOUT = 3.3V
L = 2.2
µH
INPUT VOLTAGE (V)
6
0
0.2
0.6
0.8
1.0
12
13
14
1.8
3503 G04
0.4
9
7
10
8
11
15
1.2
1.4
1.6
TYPICAL
MINIMUM
VOUT = 5V
L = 3.3
µH
Maximum Load Current



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