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LTC1439CG 数据表(PDF) 5 Page - Linear Technology

部件名 LTC1439CG
功能描述  Dual High Efficiency, Low Noise, Synchronous Step-Down Switching Regulators
PDF  32 Pages
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制造商  LINER [Linear Technology]
网页  http://www.linear.com
标志 LINER - Linear Technology

LTC1439CG 数据表(HTML) 5 Page - Linear Technology

  LTC1439CG Datasheet HTML 1Page - Linear Technology LTC1439CG Datasheet HTML 2Page - Linear Technology LTC1439CG Datasheet HTML 3Page - Linear Technology LTC1439CG Datasheet HTML 4Page - Linear Technology LTC1439CG Datasheet HTML 5Page - Linear Technology LTC1439CG Datasheet HTML 6Page - Linear Technology LTC1439CG Datasheet HTML 7Page - Linear Technology LTC1439CG Datasheet HTML 8Page - Linear Technology LTC1439CG Datasheet HTML 9Page - Linear Technology Next Button
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5
LTC1438/LTC1439
TYPICAL PERFORMANCE CHARACTERISTICS
Efficiency vs Input Voltage
VOUT = 3.3V
VIN – VOUT Dropout Voltage
vs Load Current
Efficiency vs Load Current
VITH Pin Voltage vs Output Current
Load Regulation
Input Supply Current
vs Input Voltage
EXTVCC Switch Drop
vs INTVCC Load Current
INPUT VOLTAGE (V)
0
70
75
80
85
90
100
5
10
15
20
1438 G01
25
30
95
ILOAD = 1A
ILOAD = 100mA
VOUT = 3.3V
Efficiency vs Input Voltage
VOUT = 5V
INPUT VOLTAGE (V)
0
70
75
80
85
90
100
5
10
15
20
1438 G02
25
30
95
ILOAD = 1A
ILOAD = 100mA
VOUT = 5V
LOAD CURRENT (A)
0.001
50
55
65
70
75
100
85
0.01
0.1
1
1435 G03
60
90
95
80
10
Adaptive Power
MODE
CONTINUOUS
MODE
VIN = 10V
VOUT = 5V
RSENSE = 0.33Ω
Burst Mode
®
OPERATION
LOAD CURRENT (A)
0
0
0.2
0.1
0.3
0.4
0.5
0.5
1.0
1.5
2.0
1438 G04
2.5
3.0
RSENSE = 0.033Ω
VOUT DROP OF 5%
M1, M2: Si4412
LOAD CURRENT (A)
0
0
0.5
1.0
1.5
2.0
1438 G05
2.5
3.0
– 0.25
– 0.50
– 0.75
–1.00
–1.25
–1.50
RSENSE = 0.033Ω
OUTPUT CURRENT (%)
0
1.0
2.0
3.0
0.5
1.5
2.5
20
40
60
80
1438 G06
100
10
030
50
70
90
Burst Mode
OPERATION
CONTINUOUS/Adaptive
Power MODE
INPUT VOLTAGE (V)
0
0
0.5
1.0
1.5
2.0
2.5
0
5
10
15
20
25
30
35
5
10
15
20
1438 G07
25
30
SHUTDOWN
CURRENT
5V OFF
3.3V ON
5V AND
3.3V ON
5V ON
3.3V OFF
INTVCC LOAD CURRENT (mA)
0
200
300
20
1438 G09
100
0
5
10
15
25
30
–45
°C
25
°C
70
°C
INTVCC Regulation
vs INTVCC Load Current
INTVCC LOAD CURRENT (mA)
0
0
1
50
40
1438 G08
–1
–2
10
20
30
2
70
°C
25
°C
EXTVCC = 0V
Burst Mode is a trademark of Linear Technology Corporation.



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