LTM4614 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 (Note 2), otherwise specifications are at TA = 25°C. VIN = 5V unless otherwise noted. Refer to Figure 1.
Specified as each channel (Note 5).
SYMBOL PARAMETER
CONDITIONS
MIN TYP MAX UNITS
IS(VIN)
Input Supply Current
VIN = 2.375V, VOUT = 1.5V, IOUT = 4A
VIN = 5.5V, VOUT = 1.5V, IOUT = 4A
3.15
A
1.35
A
IOUT(DC)
Output Continuous Current Range VIN = 3.3V, VOUT = 1.5V (Note 4)
0
4
A
∆VOUT(LINE)
VOUT
Line Regulation Accuracy
VOUT = 1.5V, VIN from 2.375V to 5.5V, IOUT = 0A
l
0.1
0.3
%
∆VOUT(LOAD) Load Regulation Accuracy
VOUT
VOUT = 1.5V, 0A to 4A (Note 4), VIN = 2.375V to 5.5V
0°C ≤ TJ ≤ 125°C
l
0.7
1.25
%
1.2
1.5
%
VOUT(AC)
fs
Output Ripple Voltage
Output Ripple Voltage Frequency
IOUT = 0A, COUT = 100µF (X5R)
VIN = 5V, VOUT = 1.5V
IOUT = 4A, VIN = 5V, VOUT = 1.5V
12
mVP-P
1.25
MHz
∆VOUT(START) Turn-On Overshoot
tSTART
Turn-On Time
COUT = 100µF, VOUT = 1.5V, RUN/SS = 10nF,
IOUT = 0A
VIN = 3.3V
VIN = 5V
COUT = 100µF, VOUT = 1.5V, IOUT = 1A Resistive Load,
TRACK = VIN and RUN/SS = Float
VIN = 5V
20
mV
20
mV
0.5
ms
∆VOUT(LS)
Peak Deviation for Dynamic Load Load: 0% to 50% to 0% of Full Load,
COUT = 100µF, VIN = 5V, VOUT = 1.5V
25
mV
tSETTLE
Settling Time for Dynamic Load
Step
Load: 0% to 50% to 0% of Full Load,
VIN = 5V, VOUT = 1.5V
10
µs
IOUT(PK)
Output Current Limit
COUT = 100µF
VIN = 5V, VOUT = 1.5V
8
A
VFB
Voltage at FB Pin
IOUT = 0A, VOUT = 1.5V
0.792 0.8 0.808
V
l 0.788 0.8 0.810
V
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
∆VPGOOD
PGOOD Range
RPGOOD
PGOOD Resistance
Open-Drain Pull-Down
0.2
µA
0.6
0.75
0.9
V
0.2
µA
30
mV
0
0.8
V
4.96 4.99 5.025
kΩ
±7.5
%
90
150
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
TJ ≈ TA. 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 VIN, VOUT and TA.
Note 5: Two channels are tested separately and the specified test
conditions are applied to each channel.
4614fb
3
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