Datasheet

LTM4614
3
4614fb
SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
I
S(VIN)
Input Supply Current V
IN
= 2.375V, V
OUT
= 1.5V, I
OUT
= 4A
V
IN
= 5.5V, V
OUT
= 1.5V, I
OUT
= 4A
3.15
1.35
A
A
I
OUT(DC)
Output Continuous Current Range V
IN
= 3.3V, V
OUT
= 1.5V (Note 4) 0 4 A
∆V
OUT(LINE)
V
OUT
Line Regulation Accuracy V
OUT
= 1.5V, V
IN
from 2.375V to 5.5V, I
OUT
= 0A
l
0.1 0.3 %
∆V
OUT(LOAD)
V
OUT
Load Regulation Accuracy V
OUT
= 1.5V, 0A to 4A (Note 4), V
IN
= 2.375V to 5.5V
0°C ≤ T
J
≤ 125°C
l
0.7
1.2
1.25
1.5
%
%
V
OUT(AC)
Output Ripple Voltage I
OUT
= 0A, C
OUT
= 100µF (X5R)
V
IN
= 5V, V
OUT
= 1.5V 12 mV
P-P
f
s
Output Ripple Voltage Frequency I
OUT
= 4A, V
IN
= 5V, V
OUT
= 1.5V 1.25 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
Turn-On Time C
OUT
= 100µF, V
OUT
= 1.5V, I
OUT
= 1A Resistive Load,
TRACK = V
IN
and RUN/SS = Float
V
IN
= 5V 0.5 ms
∆V
OUT(LS)
Peak Deviation for Dynamic Load Load: 0% to 50% to 0% of Full Load,
C
OUT
= 100µF, V
IN
= 5V, V
OUT
= 1.5V
25 mV
t
SETTLE
Settling Time for Dynamic Load
Step
Load: 0% to 50% to 0% of Full Load,
V
IN
= 5V, V
OUT
= 1.5V
10 µs
I
OUT(PK)
Output Current Limit C
OUT
= 100µF
V
IN
= 5V, V
OUT
= 1.5V 8 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
RUN Pin On/Off Threshold 0.6 0.75 0.9 V
I
TRACK
TRACK Pin Current 0.2 µA
V
TRACK(OFFSET)
Offset Voltage TRACK = 0.4V 30 mV
V
TRACK(RANGE)
Tracking Input Range 0 0.8 V
R
FBHI
Resistor Between V
OUT
and FB Pins 4.96 4.99 5.025 kΩ
∆V
PGOOD
PGOOD Range ±7.5 %
R
PGOOD
PGOOD Resistance Open-Drain Pull-Down 90 150 Ω
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).
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: Tw o channels are tested separately and the specified test
conditions are applied to each channel.