(Note 2).................................................. –40°C to 125°C
Junction Temperature ........................................... 125°C
Storage Temperature Range................... –55°C to 125°C
LGA PACKAGE
144-LEAD (15mm 15mm
2.8mm)
T
JMAX
= 125°C,
θ
JC-BOTTOM
= 2-3°C/W,
θ
JA
= 15°C/W,
θ
JC-TOP
= 25°C/W, wt = 1.61g
ORDER INFORMATION
LEAD FREE FINISH
LTM4615EV#PBF
LTM4615IV#PBF
TRAY
LTM4615EV#PBF
LTM4615IV#PBF
PART MARKING*
LTM4615V
LTM4615V
PACKAGE DESCRIPTION
144-Lead (15mm
×
15mm
×
2.8mm) LGA
144-Lead (15mm
×
15mm
×
2.8mm) LGA
TEMPERATURE RANGE
–40°C to 125°C
–40°C to 125°C
Consult LTC Marketing for parts specified with wider operating temperature ranges. *The temperature grade is identified by a label on the shipping container.
For more information on lead free part marking, go to:
http://www.linear.com/leadfree/
This product is only offered in trays. For more information go to:
http://www.linear.com/packaging/
The
l
denotes the specifications which apply over the full internal
operating temperature range, otherwise specifications are at T
A
= 25°C. V
IN
= 5V, LDO_IN = 1.2V unless otherwise noted.
Per Typical Application Figure 12.
SYMBOL
V
IN(DC)
V
OUT(DC)
V
OUT(DC)
PARAMETER
Input DC Voltage Range
Output DC Voltage Range
Output Voltage
C
IN
= 22μF C
OUT
= 100μF R
FB
= 5.76k,
,
,
V
IN
= 2.375V to 5.5V, I
OUT
= 0A to 4A (Note 6)
0°C ≤ T
J
≤ 125°C
I
OUT
= 0A
CONDITIONS
l
l
ELECTRICAL CHARACTERISTICS
MIN
2.375
0.8
TYP
MAX
5.5
5.0
UNITS
V
V
Switching Regulator Section: per Channel
l
1.460
1.45
1.6
1.49
1.49
2
1.12
1.512
2.3
V
V
V
V
IN(UVLO)
Undervoltage Lockout Threshold
4615f
2
LTM4615
ELECTRICAL CHARACTERISTICS
SYMBOL
I
INRUSH(VIN)
I
Q(VIN)
PARAMETER
Input Inrush Current at Start-Up
Input Supply Bias Current
The
l
denotes the specifications which apply over the full internal
operating temperature range, otherwise specifications are at T
A
= 25°C. V
IN
= 5V, LDO_IN = 1.2V unless otherwise noted.
Per Typical Application Figure 12.
CONDITIONS
I
OUT
= 0A, C
IN
= 22μF C
OUT
= 100μF V
OUT
= 1.5V,
,
,
V
IN
= 5.5V
V
IN
= 2.375V, V
OUT
= 1.5V, Switching Continuous
V
IN
= 5.5V, V
OUT
= 1.5V, Switching Continuous
Shutdown, RUN = 0, V
IN
= 5V
V
IN
= 2.375V, V
OUT
= 1.5V, I
OUT
= 4A
V
IN
= 5.5V, V
OUT
= 1.5V, I
OUT
= 4A
V
IN
= 5.5V, V
OUT
= 1.5V (Note 6)
0
±1.0
±1.3
12
1.25
MIN
TYP
0.35
28
45
7
3.2
1.48
4
±1.30
±1.6
MAX
UNITS
A
mA
mA
μA
A
A
A
%
%
mV
P-P
MHz
12
I
S(VIN)
I
OUT(DC)
ΔV
OUT(LOAD + LINE)
V
OUT
V
OUT(AC)
f
s
ΔV
OUT(START)
Input Supply Current
Output Continuous Current Range
Load and Line Regulation Accuracy V
OUT
= 1.5V, 0A to 4A (Note 6)
V
IN
= 2.375V to 5.5V
Output Ripple Voltage
Output Ripple Voltage Frequency
Turn-On Overshoot
I
OUT
= 0A, C
OUT
= 100μF
V
IN
= 5V, V
OUT
= 1.5V
I
OUT
= 4A, V
IN
= 5V, V
OUT
= 1.5V
C
OUT
= 100μF V
OUT
= 1.5V, RUN/SS = 10nF
,
,
I
OUT
= 0A
V
IN
= 3.3V
V
IN
= 5V
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
,
I
OUT
= 0A, V
OUT
= 1.5V
l
20
20
mV
mV
t
START
Turn-On Time
0.5
25
10
8
l
ms
mV
μs
A
0.807
0.809
0.9
V
V
μA
V
μA
mV
0.8
V
kΩ
%
150
3.5
Ω
V
mA
20
5.2
μA
V
V
5.02
ΔV
OUT(LS)
t
SETTLE
I
OUT(PK)
V
FB
I
FB
V
RUN
I
TRACK
V
TRACK(OFFSET)
V
TRACK(RANGE)
R
FBHI
ΔV
PGOOD
R
PGOOD
VLDO Section
V
LDO_IN
I
IN(LDO_IN)
I
IN(SHDN)
V
BOOST3
V
BOOST3(UVLO)
Peak Deviation for Dynamic Load
Settling Time for Dynamic Load
Step
Output Current Limit
Voltage at FB Pin
0.790
0.786
0.6
0.8
0.8
0.2
0.75
0.2
30
RUN Pin On/Off Threshold
TRACK Pin Current
Offset Voltage
Tracking Input Range
Resistor Between V
OUT
and FB Pins
PGOOD Range
PGOOD Resistance
Operating Voltage
Operating Current
Shutdown Current
BOOST3 Output Voltage
Undervoltage Lockout
Open-Drain Pull-Down
(Note 3)
I
OUT
= 0mA, V
OUT
= 1V, EN3 = 1.2V
EN3 = 0V, LDO_IN = 1.5V
EN3 = 1.2V
l
TRACK = 0.4V
0
4.96
4.99
±7.5
90
1.14
1
0.6
4.8
5
4.3
4615f
3
LTM4615
ELECTRICAL CHARACTERISTICS
SYMBOL
V
FB3
V
LDO_OUT
V
DO
LDO_RHI
I
OUT
I
LIM
e
n
V
IH_EN3
V
IL_EN3
I
IN_EN3
V
OL_PGOOD3
PGOOD Threshold
PARAMETER
FB3 Internal Reference Voltage
Output Voltage Range
Dropout Voltage
LDO Top Feedback Resistor
Output Current
Output Current Limit
Output Voltage Noise
EN3 Input High Voltage
EN3 Input Low Voltage
EN3 Input Current
PGOOD Low Voltage
Output Threshold
Relative to V
FB3
I
PGOOD3
= 2mA
PGOOD3 High to Low
PGOOD3 Low to High
–14
–4
V
EN3
= 1.2V
(Note 5)
Frequency = 10Hz to 1MHz, I
LOAD
= 1A
1.14V ≤ V
LDO_IN
≤ 3.5V
1.14V ≤ V
LDO_IN
≤ 3.5V
–1
0.1
–12
–3
l
l
The
l
denotes the specifications which apply over the full internal
operating temperature range, otherwise specifications are at T
A
= 25°C. V
IN
= 5V, LDO_IN = 1.2V unless otherwise noted.
Per Typical Application Figure 12.
CONDITIONS
1mA ≤ I
OUT
≤ 1.5A, 1.14V ≤ V
LDO_IN
≤ 3.5V,
BOOST3 = 5V, 1V ≤ V
OUT
≤ 2.59V
V
LDO_IN
= 1.5V, V
FB3
= 0.38V, I
OUT
= 1.5A (Note 4)
4.96
1.5
2.5
300
1
0.4
1
0.4
–10
–2
l
MIN
0.397
0.395
0.4
TYP
0.4
0.4
100
4.99
MAX
0.404
0.405
2.6
250
5.02
UNITS
V
V
V
mV
kΩ
A
A
μRMS
V
V
μA
V
%
%
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 LTM4615E 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 LTM4615I 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:
Minimum operating voltage required for regulation is:
V
IN
≥ V
OUT(MIN)
+ V
DROPOUT
Note 4:
Dropout voltage is the minimum input to output differential needed
to maintain regulation at a specified output current. In dropout the output
voltage will be equal to V
IN
– V
DROPOUT
.
Note 5:
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 6:
See output current derating curves for different V
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