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LTC3728LIGN#TRPBF
P1-P3
P4-P6
P7-P9
P10-P12
P13-P15
P16-P18
P19-P21
P22-P24
P25-P27
P28-P30
P31-P33
P34-P36
P37-P38
L
TC3728L/L
TC3728LX
7
3728lxff
Typical perForMance characTerisTics
Maximum Current Sense Threshold
vs V
RUN/SS
(Soft-Start)
Maximum Current Sense Threshold
vs Sense Common Mode Voltage
Current Sense Threshold
vs I
TH
Voltage
Load Regulation
V
ITH
vs V
RUN/SS
SENSE Pins T
otal Source Current
Maximum Current Sense
Threshold vs T
emperature
Dropout Voltage vs Output Current
(Figure 14)
RUN/SS Current vs T
emperature
V
RUN/SS
(V)
0
0
V
SENSE
(mV)
20
40
60
80
1
2
3
4
3728L G10
5
6
V
SENSE(CM)
= 1.6V
COMMON MODE VOLTAGE (V)
0
V
SENSE
(mV)
72
76
80
4
3728L G11
68
64
60
1
2
3
5
V
ITH
(V)
0
V
SENSE
(mV)
30
50
70
90
2
3728L G12
10
–10
20
40
60
80
0
–20
–30
0.5
1
1.5
2.5
LOAD CURRENT (A)
0
NORMALIZED V
OUT
(%)
–0.2
–0.1
4
3728L G13
–0.3
–0.4
1
2
3
5
0.0
FCB = 0V
V
IN
= 15V
FIGURE 13
V
RUN/SS
(V)
0
0
V
ITH
(V)
0.5
1.0
1.5
2.0
2.5
1
2
3
4
3728L G14
5
6
V
OSENSE
= 0.7V
V
SENSE
COMMON MODE VOLTAGE (V)
0
I
SENSE
(µA)
0
3728L G15
–50
–100
2
4
50
100
6
TEMPERATURE (°C)
–50
–25
70
V
SENSE
(mV)
74
80
0
50
75
3728L G17
72
78
76
25
100
125
OUTPUT CURRENT (A)
0
0
DROPOUT VOLTAGE (V)
1
2
3
4
0.5
1.0
1.5
2.0
3728L G18
2.5
3.0
3.5
4.0
R
SENSE
= 0.015Ω
R
SENSE
= 0.010Ω
V
OUT
= 5V
TEMPERATURE (°C)
–50
–25
0
RUN/SS CURRENT (µA)
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
L
TC3728L/L
TC3728LX
8
3728lxff
Typical perForMance characTerisTics
Soft-Start Up (Figure 13)
Load Step (Figure 13)
Load Step (Figure 13)
Input Source/Capacitor
Instantaneous Current (Figure 13)
Burst Mode Operation (Figure 13)
Constant-Frequency (Burst Inhibit)
Operation (Figure 13)
3728L G19
V
OUT
5V/DIV
V
RUN/SS
5V/DIV
I
L
2A/DIV
5ms/DIV
V
IN
= 15V
V
OUT
= 5V
3728L G20
V
OUT
200mV/DIV
I
L
2A/DIV
20µs/DIV
V
IN
= 15V
V
OUT
= 5V
V
PLLFL
TR
= 0V
LOAD STEP = 0A TO 3A
Burst Mode OPERA
TION
3728L G21
V
OUT
200mV/DIV
I
L
2A/DIV
20µs/DIV
V
IN
= 15V
V
OUT
= 5V
V
PLLFL
TR
= 0V
LOAD STEP = 0A TO 3A
CONTINUOUS MODE
3728L G22
V
IN
200mV/DIV
V
SW1
10V/DIV
V
SW2
10V/DIV
I
IN
2A/DIV
1
µs/DIV
V
IN
= 15V
V
OUT1
= 5V
, V
OUT2
= 3.3V
V
PLLFL
TR
= 0V
I
OUT5
= I
OUT3.3
= 2A
3728L G23
V
OUT
20mV/DIV
I
L
0.5A/DIV
10µs/DIV
V
IN
= 15V
V
OUT
= 5V
V
PLLFL
TR
= 0V
V
FCB
= OPEN
I
OUT
= 20mA
3728L G24
V
OUT
20mV/DIV
I
L
0.5A/DIV
2µs/DIV
V
IN
= 15V
V
OUT
= 5V
V
PLLFL
TR
= 0V
V
FCB
= 5V
I
OUT
= 20mA
L
TC3728L/L
TC3728LX
9
3728lxff
Typical perForMance characTerisTics
Current Sense Pin Input Current
vs T
emperature
EXT
V
CC
Switch Resistance
vs T
emperature
Oscillator Frequency
vs T
emperature
Under
voltage Lockout
vs T
emperature
Shutdown Latch Thresholds
vs T
emperature
TEMPERATURE (°C)
–50
–25
25
CURRENT SENSE INPUT CURRENT (µA)
29
35
0
50
75
3728L G26
27
33
31
25
100
125
V
OUT
= 5V
TEMPERATURE (°C)
–50
–25
0
EXTV
CC
SWITCH RESISTANCE (Ω)
4
10
0
50
75
3728L G27
2
8
6
25
100
125
TEMPERATURE (°C)
–50
400
500
700
25
75
3728L G28
300
200
–25
0
50
100
125
100
0
600
FREQUENCY (kHz)
V
PLLFLTR
= 2.4V
V
PLLFLTR
= 1.2V
V
PLLFLTR
= 0V
TEMPERATURE (°C)
–50
UNDERVOLTAGE LOCKOUT (V)
3.40
3.45
3.50
25
75
3728L G29
3.35
3.30
–25
0
50
100
125
3.25
3.20
TEMPERATURE (°C)
–50
–25
0
SHUTDOWN LATCH THRESHOLDS (V)
0.5
1.5
2.0
2.5
75
100
50
4.5
3728L G30
1.0
0
25
125
3.0
3.5
4.0
LATCH ARMING
LATCHOFF
THRESHOLD
P1-P3
P4-P6
P7-P9
P10-P12
P13-P15
P16-P18
P19-P21
P22-P24
P25-P27
P28-P30
P31-P33
P34-P36
P37-P38
LTC3728LIGN#TRPBF
Mfr. #:
Buy LTC3728LIGN#TRPBF
Manufacturer:
Analog Devices / Linear Technology
Description:
Switching Voltage Regulators 2x, 550kHz, 2-PhSync Regs
Lifecycle:
New from this manufacturer.
Delivery:
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