LTC3104
3
3104f
ELECTRICAL CHARACTERISTICS
The l denotes the specifications which apply over the full operating
junction temperature range, otherwise specifications are at T
A
= 25癈 (Note 2). V
IN
= V
INLDO
= 10V unless otherwise noted.
PARAMETER
CONDITIONS
MIN TYP MAX UNITS
Step-Down Converter
Input Voltage Range
l 2.5
15
V
Input Undervoltage Lockout Threshold
V
IN
Rising
V
IN
Rising, T
J
= 0癈 to 85癈 (Note 4)
l
2.1
2.1
2.6
2.5
V
V
Input Undervoltage Lockout Hysteresis
(Note 4)
0.4
V
Feedback Voltage
(Note 5)
l 0.588 0.6 0.612
V
Feedback Voltage Line Regulation
V
IN
= 2.5V to 15V (Note 5)
0.02 0.05
%/V
Feedback Input Current
(Note 5)
l
1 20
nA
Oscillator Frequency
T
J
= 0癈 to 85癈 (Note 4)
l 0.93
1.0
1.2
1.2
1.55
1.45
MHz
MHz
Quiescent Current, V
IN
Active
RUN = V
IN
, RUNLDO = V
IN
, MODE = 0V,
FB > 0.612, Nonswitching
600
礎
Quiescent Current, V
IN
Sleep
T
J
= 0癈 to 85癈, RUN = MODE = V
IN
, FB > 0.612
RUNLDO = V
IN
(Note 4)
RUNLDO = 0V (Note 4)
2.6
1.8
3.3
2.6
礎
礎
RUN = MODE = V
IN
, FB > 0.612
RUNLDO = V
IN
RUNLDO = 0V
l
l
2.8
1.8
5.5
4.5
礎
礎
Quiescent Current, V
IN
Shutdown
RUN = 0V, RUNLDO = 0V, T
J
= 0癈 to 85癈 (Note 4)
RUN = 0V, RUNLDO = 0V
l
1
1
1.7
3.3
礎
礎
N-Channel MOSFET Synchronous Rectifier Leakage
Current
V
IN
= V
SW
=15V, V
RUN
= 0V
0.01 0.3
礎
N-Channel MOSFET Switch Leakage Current
V
IN
=15V, V
SW
= 0V, V
RUN
= 0V
0.01 0.3
礎
N-Channel MOSFET Synchronous Rectifier R
DS(ON)
I
SW
= 200mA
0.85
?/DIV>
N-Channel MOSFET Switch R
DS(ON)
I
SW
= 200mA
0.65
?/DIV>
Peak Current Limit
l
0.40 0.50 0.75
A
PGOOD Threshold
FB Falling, Percentage Below FB
14 10 5
%
PGOOD Hysteresis
Percentage of FB
2
%
PGOOD Voltage Low
I
PGOOD
= 100礎
0.2
V
PGOOD Leakage Current
V
PGOOD
= 5V
0.01 0.3
礎
Maximum Duty Cycle
l 89 92
%
Switch Minimum Off Time (t
OFF(MIN)
)
(Note 4)
65
ns
Synchronous Rectifier Minimum On Time (t
ON(MIN)
) (Note 4)
70
ns
RUN Pin Threshold
RUN Pin Rising
l 0.76 0.8 0.85
V
RUN Pin Hysteresis
0.06
V
RUN Input Current
RUN = 1.2V
l
0.01 0.4
礎
MODE Threshold
l
0.5 0.8 1.2
V
MODE Input Current
MODE = 1.2V
0.1 4
礎
Soft-Start Time
0.7 1.4 2.5
ms
LDO Regulator
LDO Input Voltage Range (V
IN(LDO)
)
l
2.5
15
V
LDO Output Voltage Range (V
LDO
)
I
LDO
= 1mA
l
0.6
14.5
V
LDO Feedback Voltage
l
0.576 0.6 0.624
V
LDO Feedback Input Current
l
1 20
nA
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