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LTC3728LX Datasheet(PDF) 6 Page - Linear Technology

Part # LTC3728LX
Description  Dual, 550kHz, 2-Phase Synchronous Regulators
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Manufacturer  LINER [Linear Technology]
Direct Link  http://www.linear.com
Logo LINER - Linear Technology

LTC3728LX Datasheet(HTML) 6 Page - Linear Technology

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LTC3728L/LTC3728LX
3728lxfa
TEMPERATURE (
°C)
–50
–25
70
74
80
0
50
75
3728L G17
72
78
76
25
100
125
OUTPUT CURRENT (A)
0
0
1
2
3
4
0.5
1.0
1.5
2.0
3728L G18
2.5
3.0
3.5
4.0
RSENSE = 0.015Ω
RSENSE = 0.010Ω
VOUT = 5V
Maximum Current Sense
Threshold vs Temperature
Dropout Voltage vs Output Current
(Figure 14)
Soft-Start Up (Figure 13)
VOUT
5V/DIV
VRUN/SS
5V/DIV
IL
2A/DIV
VIN = 15V
5ms/DIV
3728L G19
VOUT = 5V
Load Step (Figure 13)
VOUT
200mV/DIV
IL
2A/DIV
VIN = 15V
20
µs/DIV
3728L G20
VOUT = 5V
VPLLFLTR = 0V
LOAD STEP = 0A TO 3A
Burst Mode OPERATION
Load Step (Figure 13)
VOUT
200mV/DIV
IL
2A/DIV
VIN = 15V
20
µs/DIV
3728L G21
VOUT = 5V
VPLLFLTR = 0V
LOAD STEP = 0A TO 3A
CONTINUOUS MODE
RUN/SS Current vs Temperature
TEMPERATURE (
°C)
–50
–25
0
0.2
0.6
0.8
1.0
75
100
50
1.8
3728L G25
0.4
0
25
125
1.2
1.4
1.6
TYPICAL PERFOR A CE CHARACTERISTICS
Load Regulation
LOAD CURRENT (A)
0
–0.2
–0.1
4
3728L G13
–0.3
–0.4
1
2
3
5
0.0
FCB = 0V
VIN = 15V
FIGURE 13
VITH vs VRUN/SS
VRUN/SS (V)
0
0
0.5
1.0
1.5
2.0
2.5
1
23
4
3728L G14
56
VOSENSE = 0.7V
SENSE Pins Total Source Current
VSENSE COMMON MODE VOLTAGE (V)
0
0
3728L G15
–50
–100
24
50
100
6


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