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LTC1626CS 数据表(PDF) 3 Page - Linear Technology

部件名 LTC1626CS
功能描述  Low Voltage, High Efficiency Step-Down DC/DC Converter
PDF  12 Pages
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制造商  LINER [Linear Technology]
网页  http://www.linear.com
标志 LINER - Linear Technology

LTC1626CS 数据表(HTML) 3 Page - Linear Technology

  LTC1626CS Datasheet HTML 1Page - Linear Technology LTC1626CS Datasheet HTML 2Page - Linear Technology LTC1626CS Datasheet HTML 3Page - Linear Technology LTC1626CS Datasheet HTML 4Page - Linear Technology LTC1626CS Datasheet HTML 5Page - Linear Technology LTC1626CS Datasheet HTML 6Page - Linear Technology LTC1626CS Datasheet HTML 7Page - Linear Technology LTC1626CS Datasheet HTML 8Page - Linear Technology LTC1626CS Datasheet HTML 9Page - Linear Technology Next Button
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LTC1626
TYPICAL PERFORMANCE CHARACTERISTICS
INPUT VOLTAGE (V)
100
98
96
94
92
90
88
86
84
82
80
1626 G01
5.0 5.5 6.0 6.5 7.0 7.5
4.5
2.5
3.5 4.0
3.0
IOUT = 100mA
L1 = 33
µH
RSENSE = 0.1Ω
CT = 270pF
IOUT = 250mA
INPUT VOLTAGE (V)
100
98
96
94
92
90
88
86
84
82
80
1626 G03
5.0 5.5 6.0 6.5 7.0 7.5
4.5
2.5
3.5 4.0
3.0
IOUT = 100mA
L1 = 33
µH
RSENSE = 0.1Ω
CT = 270pF
IOUT = 250mA
OUTPUT CURRENT (A)
0.01
100
95
90
85
80
75
70
0.1
1
1626 G02
L1 = 33
µH
VIN = 5V
VOUT = 3.3V
RSENSE = 0.1Ω
CT = 270pF
Efficiency vs Input Voltage
(VOUT = 2.5V)
Efficiency vs Input Voltage
(VOUT = 3.3V)
INPUT VOLTAGE (V)
2.0
1.8
1.6
1.4
1.2
1.0
0.8
0.6
0.4
0.2
0
1626 G04
5.0 5.5 6.0 6.5 7.0 7.5
4.5
2.5
3.5 4.0
3.0
FIGURE 1 CIRCUIT
Switch Resistance
INPUT VOLTAGE (V)
1.0
0.9
0.8
0.7
0.6
0.5
0.4
0.3
0.2
0.1
0
1626 G05
5.0 5.5 6.0 6.5 7.0
2.0
4.5
2.5
3.5 4.0
3.0
TJ = 70°C
TJ = 0°C
TJ = 25°C
JUNCTION TEMPERATURE (
°C)
100
90
80
70
60
50
40
30
20
10
0
1626 G06
50 60 70 80 90 100
40
020 30
10
VIN = 4.5V
Switch Leakage Current
Operating Frequency
INPUT VOLTAGE (V)
5.0
4.5
4.0
3.5
3.0
2.5
2.0
1.5
1.0
0.5
0
1626 G07
5.0 5.5 6.0 6.5 7.0 7.5
4.5
2.5
3.5 4.0
3.0
TJ = 25°C
* DOES NOT INCLUDE
GATE CHARGE CURRENT
ACTIVE MODE
SLEEP MODE
INPUT VOLTAGE (V)
0.50
0.45
0.40
0.35
0.30
0.25
0.20
0.15
0.10
0.05
0
1626 G08
5.0 5.5 6.0 6.5 7.0 7.5
4.5
2.5
3.5 4.0
3.0
TJ = 25°C
SHUTDOWN = VIN
INPUT VOLTAGE (V)
5.0
4.5
4.0
3.5
3.0
2.5
2.0
1.5
1.0
0.5
0
1626 G09
2.5 3.0 3.5 4.0 4.5 5.0
2.0
0
1.0 1.5
0.5
L1 = 33
µH
RSENSE = 0.1Ω
CT = 270pF
TJ = 25°C
ILOAD = 250mA
VOUT = 3.3V
VOUT = 2.5V
Supply Current in Shutdown
Low Voltage Behavior
DC Supply Current*
Efficiency vs Output Current
(VOUT = 3.3V)



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