LTM4614(RevA) Ver la hoja de datos (PDF) - Linear Technology
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LTM4614 Datasheet PDF : 20 Pages
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LTM4614
ELECTRICAL CHARACTERISTICS The l denotes the specifications which apply over the full internal
operating temperature range, otherwise specifications are at TA = 25°C. VIN = 5V unless otherwise noted. Refer to Figure 1.
Specified as each channel (Note 6).
SYMBOL PARAMETER
CONDITIONS
MIN TYP MAX
IOUT(DC)
Output Continuous Current Range VIN = 3.3V, VOUT = 1.5V (Note 5)
0
ΔVOUT(LINE) Line Regulation Accuracy
VOUT = 1.5V, VIN from 2.375V to 5.5V, IOUT = 0A
l
VOUT
ΔVOUT(LOAD) Load Regulation Accuracy
VOUT
VOUT = 1.5V, 0A to 4A (Note 5), VIN = 2.375V to 5.5V
0°C ≤ TJ ≤ 125°C
l
4
0.1
0.3
0.7 1.25
1.2
1.5
VOUT(AC)
Output Ripple Voltage
IOUT = 0A, COUT = 100μF (X5R)
VIN = 5V, VOUT = 1.5V
12
fs
Output Ripple Voltage Frequency IOUT = 4A, VIN = 5V, VOUT = 1.5V
1.25
ΔVOUT(START) Turn-On Overshoot
COUT = 100μF, VOUT = 1.5V, RUN/SS = 10nF,
IOUT = 0A
VIN = 3.3V
20
VIN = 5V
20
tSTART
Turn-On Time
COUT = 100μF, VOUT = 1.5V, IOUT = 1A Resistive Load,
TRACK = VIN and RUN/SS = Float
VIN = 5V
0.5
ΔVOUT(LS) Peak Deviation for Dynamic Load Load: 0% to 50% to 0% of Full Load,
25
COUT = 100μF, VIN = 5V, VOUT = 1.5V
tSETTLE
Settling Time for Dynamic Load Load: 0% to 50% to 0% of Full Load,
10
Step
VIN = 5V, VOUT = 1.5V
IOUT(PK)
Output Current Limit
COUT = 100μF
VIN = 5V, VOUT = 1.5V
8
VFB
Voltage at FB Pin
IOUT = 0A, VOUT = 1.5V
0.792 0.8 0.808
l 0.788 0.8 0.810
IFB
VRUN
RUN Pin On/Off Threshold
ITRACK
TRACK Pin Current
VTRACK(OFFSET) Offset Voltage
TRACK = 0.4V
VTRACK(RANGE) Tracking Input Range
RFBHI
Resistor Between VOUT and FB Pins
ΔVPGOOD
PGOOD Range
RPGOOD
PGOOD Resistance
Open-Drain Pull-Down
0.2
0.6
0.75
0.9
0.2
30
0
0.8
4.96 4.99 5.025
±7.5
90
150
UNITS
A
%
%
%
mVP-P
MHz
mV
mV
ms
mV
μs
A
V
V
μA
V
μA
mV
V
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 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 is determined by specific operating conditions in conjunction
with board layout, the rated package thermal resistance and other
environmental factors.
Note 3: See Application Note 100.
Note 4: 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 5: See output current derating curves for different VIN, VOUT and TA.
Note 6: Two channels are tested separately and the specified test
conditions are applied to each channel.
4614fa
3
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