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LT1528 Datasheet(PDF) 4 Page - Linear Technology

Part # LT1528
Description  3A Low Dropout Regulator for Microprocessor Applications
PDF  12 Pages
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Manufacturer  LINER [Linear Technology]
Direct Link  http://www.linear.com
Logo LINER - Linear Technology

LT1528 Datasheet(HTML) 4 Page - Linear Technology

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4
LT1528
TYPICAL PERFORMANCE CHARACTERISTICS
Quiescent Current
Dropout Voltage
Guaranteed Dropout Voltage
TEMPERATURE (
°C)
–50
25
LT1528 • TPC02
–25
0
50
0.8
0.7
0.6
0.5
0.4
0.3
0.2
0.1
0
75
100
125
ILOAD = 3A
ILOAD = 1.5A
ILOAD = 300mA
ILOAD = 10mA
ILOAD = 700mA
TEMPERATURE (
°C)
–50
25
LT1528 • TPC03
–25
0
50
2.00
1.75
1.50
1.25
1.00
0.75
0.50
0.25
0
75
100
125
VSHDN = OPEN
VSHDN = 0V
VIN = 4.3V
RL =
∞
Sense Pin Voltage
Ground Pin Current
Quiescent Current
INPUT VOLTAGE (V)
0
2000
1750
1500
1250
1000
750
500
250
0
8
LT1528 • TPC04
2
135
79
4
6
10
ILOAD = 0
RLOAD =
∞
VSHDN = OPEN (HIGH)
VSHDN = 0V
TEMPERATURE (
°C)
–50
25
LT1528 • TPC05
–25
0
50
3.400
3.375
3.350
3.325
3.300
3.275
3.250
3.225
3.200
75
100
125
ILOAD = 1mA
Shutdown Pin Threshold
(On-to-Off)
Ground Pin Current
Ground Pin Current
INPUT VOLTAGE (V)
0
100
90
80
70
60
50
40
30
20
10
0
8
LT1528 • TPC07
2
135
79
4
6
10
TJ = 25°C
VOUT = VSENSE
*FOR VOUT = 3.3V
RL = 1.1Ω
ILOAD = 3A*
RL = 2.2Ω
ILOAD = 1.5A*
RL = 4.7Ω
ILOAD = 700mA*
OUTPUT CURRENT (A)
0
0.5
1.0
1.5
2.0
LT1528 • TPC01
2.5
1.0
0.9
0.8
0.7
0.6
0.5
0.4
0.3
0.2
0.1
0
3.0
TJ ≤ 125°C
TJ ≤ 25°C
= TEST POINTS
OUTPUT CURRENT (A)
0
0.5
1.0
1.5
2.0
LT1528 • TPC08
2.5
100
90
80
70
60
50
40
30
20
10
0
3.0
TJ = 125°C
TJ = –50°C
TJ = 25°C
VIN = 3.3V
DEVICE IS OPERATING
IN DROPOUT
INPUT VOLTAGE (V)
0
0
1
3
4
5
7
1
5
7
LT1528 • TPC06
2
6
4
9
10
2
3
68
RL = 6.6Ω
ILOAD = 500mA*
RL = 11Ω
ILOAD = 300mA*
RL = 33Ω
ILOAD = 100mA*
RL = 330Ω: ILOAD = 10mA*
TJ = 25°C
VOUT = VSENSE
*FOR VOUT = 3.3V
TEMPERATURE (
°C)
–50
2.0
1.8
1.6
1.4
1.2
1.0
0.8
0.6
0.4
0.2
0
0
50
75
LT1528 • TPC09
–25
25
100
125
ILOAD = 1mA



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