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LTM4614
ELECTRICAL CHARACTERISTICS The l denotes the specifications which apply over the full internal
operating temperature range (Note 2), otherwise specifications are at T A = 25°C. V IN = 5V unless otherwise noted. Refer to Figure 1.
Specified as each channel (Note 5).
SYMBOL
I S(VIN)
I OUT(DC)
? V OUT(LINE )
PARAMETER
Input Supply Current
Output Continuous Current Range
Line Regulation Accuracy
CONDITIONS
V IN = 2.375V, V OUT = 1.5V, I OUT = 4A
V IN = 5.5V, V OUT = 1.5V, I OUT = 4A
V IN = 3.3V, V OUT = 1.5V (Note 4)
V OUT = 1.5V, V IN from 2.375V to 5.5V, I OUT = 0A
l
MIN
0
TYP
3.15
1.35
0.1
MAX
4
0.3
UNITS
A
A
A
%
V OUT
? V OUT(LOAD )
V OUT
V OUT(AC)
f s
Load Regulation Accuracy
Output Ripple Voltage
Output Ripple Voltage Frequency
V OUT = 1.5V, 0A to 4A (Note 4), V IN = 2.375V to 5.5V
0°C ≤ T J ≤ 125°C
I OUT = 0A, C OUT = 100μF (X5R)
V IN = 5V, V OUT = 1.5V
I OUT = 4A, V IN = 5V, V OUT = 1.5V
l
0.7
1.2
12
1.25
1.25
1.5
%
%
mV P-P
MHz
? V OUT(START) Turn-On Overshoot
C OUT = 100μF, V OUT = 1.5V, RUN/SS = 10nF,
I OUT = 0A
V IN = 3.3V
V IN = 5V
20
20
mV
mV
t START
? V OUT(LS)
t SETTLE
I OUT(PK)
Turn-On Time
Peak Deviation for Dynamic Load
Settling Time for Dynamic Load
Step
Output Current Limit
C OUT = 100μF, V OUT = 1.5V, I OUT = 1A Resistive Load,
TRACK = V IN and RUN/SS = Float
V IN = 5V
Load: 0% to 50% to 0% of Full Load,
C OUT = 100μF, V IN = 5V, V OUT = 1.5V
Load: 0% to 50% to 0% of Full Load,
V IN = 5V, V OUT = 1.5V
C OUT = 100μF
V IN = 5V, V OUT = 1.5V
0.5
25
10
8
ms
mV
μs
A
V FB
Voltage at FB Pin
I OUT = 0A, V OUT = 1.5V
l
0.792
0.788
0.8
0.8
0.808
0.810
V
V
I FB
0.2
μA
V RUN
I TRACK
RUN Pin On/Off Threshold
TRACK Pin Current
0.6
0.75
0.2
0.9
V
μA
V TRACK(OFFSET) Offset Voltage
V TRACK(RANGE) Tracking Input Range
TRACK = 0.4V
0
30
0.8
mV
V
R FBHI
? V PGOOD
R PGOOD
Resistor Between V OUT and FB Pins
PGOOD Range
PGOOD Resistance
Open-Drain Pull-Down
4.96
4.99
±7.5
90
5.025
150
kΩ
%
Ω
Note 1: Stresses beyond those listed under Absolute Maximum Ratings
may cause permanent damage to the device. Exposure to any Absolute
Maximum Rating condition for extended periods may affect device
reliability and lifetime.
Note 2: The LTM4614 is tested under pulsed load conditions such that
T J ?≈ T A . The LTM4614E is guaranteed to meet performance specifications
over the 0°C to 125°C internal operating temperature range. Specifications
over the –40°C to 125°C internal operating temperature range are assured
by design, characterization and correlation with statistical process
controls. The LTM4614I is guaranteed to meet specifications over the full
internal operating temperature range. Note that the maximum ambient
temperature consistent with these specifications is determined by specific
operating conditions in conjunction with board layout, the rated package
thermal resistance and other environmental factors.
Note 3: The IC has overtemperature protection that is intended to protect
the device during momentary overload conditions. Junction temperatures
will exceed 125°C when overtemperature is activated. Continuous
overtemperature activation can impair long-term reliability.
Note 4: See output current derating curves for different V IN , V OUT and T A .
Note 5: Two channels are tested separately and the specified test
conditions are applied to each channel.
4614fb
3
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