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LTM4627
ELECTRICAL CHARACTERISTICS The l denotes the specifications which apply over the specified internal
operating temperature range, otherwise specifications are at T A = 25°C (Note 2), V IN = 12V, per the typical application in Figure 18.
SYMBOL
V IN
PARAMETER
Input DC Voltage
CONDITIONS
l
MIN
4.5
TYP
MAX
20
UNITS
V
V OUT(DC)
Output Voltage, Total
Variation with Line and Load
C IN = 22μF × 3
C OUT = 100μF Ceramic, 470μF POSCAP
R FB = 40.2k, MODE_PLLIN = GND
V IN = 5V to 20V, I OUT = 0A to 15A (Note 4)
l
1.477
1.50
1.523
V
Input Specifications
V RUN
RUN Pin On Threshold
V RUN Rising
1.1
1.25
1.4
V
V RUNHYS
RUN Pin On Hysteresis
130
mV
I Q(VIN)
I S(VIN)
Input Supply Bias Current
Input Supply Current
V IN = 12V, V OUT = 1.5V, Burst Mode Operation, I OUT = 0.1A
V IN = 12V, V OUT = 1.5V, Pulse-Skipping Mode, I OUT = 0.1A
V IN = 12V, V OUT = 1.5V, Switching Continuous, I OUT = 0.1A
Shutdown, RUN = 0, V IN = 12V
V IN = 5V, V OUT = 1.5V, I OUT = 15A
V IN = 12V, V OUT = 1.5V, I OUT = 15A
17
25
54
40
5.05
2.13
mA
mA
mA
μA
A
A
Output Specifications
I OUT(DC)
Output Continuous Current
Range
V IN = 12V, V OUT = 1.5V (Note 4)
0
15
A
?V OUT (Line)
V OUT
?V OUT (Load )
V OUT
V OUT(AC)
?V OUT(START)
t START
?V OUTLS
t SETTLE
I OUTPK
Line Regulation Accuracy
Load Regulation Accuracy
Output Ripple Voltage
Turn-On Overshoot
Turn-On Time
Peak Deviation for Dynamic
Load
Settling Time for Dynamic
Load Step
Output Current Limit
V OUT = 1.5V, V IN from 4.5V to 20V
I OUT = 0A
V OUT = 1.5V, I OUT = 0A to 15A, V IN = 12V (Note 4)
I OUT = 0A, C OUT = 100μF Ceramic, 470μF POSCAP
V IN = 12V, V OUT = 1.5V
C OUT = 100μF Ceramic, 470μF POSCAP,
V OUT = 1.5V, I OUT = 0A, V IN = 12V
C OUT = 100μF Ceramic, 470μF POSCAP,
No Load, TRACK/SS = 0.001μF, V IN = 12V
Load: 0% to 50% to 0% of Full Load
C OUT = 100μF Ceramic, 470μF POSCAP,
V IN = 12V, V OUT = 1.5V
Load: 0% to 50% to 0% of Full Load V IN = 5V,
C OUT = 100μF Ceramic, 470μF POSCAP
V IN = 12V, V OUT = 1.5V
V IN = 5V, V OUT = 1.5V
l
l
0.02
0.2
15
20
0.6
60
20
25
25
0.06
0.45
%/V
%
mV P-P
mV
ms
mV
μs
A
A
Control Section
V FB
I FB
Voltage at V FB Pin
Current at V FB Pin
I OUT = 0A, V OUT = 1.5V
(Note 7)
l
0.594
0.60
–12
0.606
–25
V
nA
V OVL
I TRACK/SS
t ON(MIN)
R FBHI
V OSNS+ ,
V OSNS– CM RANGE
Feedback Overvoltage
Lockout
Track Pin Soft-Start Pull-Up
Current
Minimum On-Time
Resistor Between V OUT_LCL
and V FB Pins
Common Mode Input Range
TRACK/SS = 0V
(Note 3)
V IN = 12V, Run > 1.4V
l
0.65
1.0
60.05
0
0.67
1.2
90
60.40
0.69
1.4
60.75
4
V
μA
ns
kΩ
V
V DIFF_OUT(MAX)
Maximum DIFF_OUT Voltage I DIFF_OUT = 300μA
INTV CC – 1.4
V
4627fc
For more information www.linear.com/LTM4627
3
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