LTM8053/LTM8053-1
40V
IN
, 3.5A Step-Down
Silent Switcher µModule Regulator
FEATURES
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DESCRIPTION
The
LTM
®
8053
is a 40V
IN
, 3.5A continuous, 6A peak step-
down µModule
®
(power module) regulator. Included in
the package are the switching controller, power switches,
inductor, and all support components. Operating over an
input voltage range of 3.4V to 40V, the LTM8053/LTM8053-
1 supports an output voltage range of 0.97V to 15V and a
switching frequency range of 200kHz to 3MHz, each set
by a single resistor. Only the input and output filter capaci-
tors are needed to finish the design. The LTM8053-1 can
operate in forced continuous mode.
The low profile package enables utilization of unused
space on the bottom of PC boards for high density point
of load regulation. The LTM8053/LTM8053-1 is packaged
in a thermally enhanced, compact over-molded ball grid
array (BGA) package suitable for automated assembly
by standard surface mount equipment. The LTM8053/
LTM8053-1 is RoHS compliant.
All registered trademarks and trademarks are the property of their respective owners.
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Complete Step-Down Switch Mode Power Supply
Low Noise Silent Switcher
®
Architecture
Wide Input Voltage Range: 3.4V to 40V
Wide Output Voltage Range: 0.97V to 15V
3.5A Continuous Output Current at 12V
IN
, 5V
OUT
,
T
A
= 85°C
6A Peak Output Current
Parallelable for Increased Output Current
Selectable Switching Frequency: 200kHz to 3MHz
Tiny, Low Profile 6.25mm × 9mm × 3.32mm RoHS
Compliant BGA Package
APPLICATIONS
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Automotive Battery Regulation
Power for Portable Products
Distributed Supply Regulation
Industrial Supplies
Wall Transformer Regulation
TYPICAL APPLICATION
5V
OUT
from 7V
IN
to 40V
IN
Step-Down Converter
95
V
IN
7V TO 40V
4.7µF
RT
40.2k
1MHz
GND
SYNC
FB
60.4k
V
IN
RUN
LTM8053
BIAS
AUX
V
OUT
85
EFFICIENCY (%)
V
OUT
5V
3.5A
100µF
8053 TA01a
Efficiency, V
OUT
= 5V
75
65
PINS NOT USED IN THIS CIRCUIT: TR/SS, PG, SHARE
55
0
12V
IN
1
2
3
LOAD CURRENT (A)
4
8053 TA01
Document Feedback
For more information
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1
Rev D
LTM8053/LTM8053-1
ABSOLUTE MAXIMUM RATINGS
(Notes 1, 2)
PIN CONFIGURATION
TOP VIEW
RUN
GND
6
5
4
AUX
BIAS
3
2
1
BANK 2
V
IN
V
IN
, RUN, PG Voltage ................................................42V
AUX, V
OUT
, BIAS Voltage ..........................................19V
FB, TR/SS Voltage.......................................................4V
SYNC Voltage..............................................................6V
Maximum Internal Temperature ............................ 125°C
Storage Temperature.............................. –50°C to 125°C
Peak Reflow Solder Body Temperature ................. 250°C
RT TR/SS
SHARE SYNC
PG
BANK 1
GND
BANK 3
V
OUT
GND FB
A
B
C
D
E
F
G
H
48-LEAD (9mm × 6.25mm × 3.32mm) BGA PACKAGE
T
JMAX
= 125°C,
θ
JA
= 24.3°C/W,
θ
JCbottom
= 5.8°C/W,
θ
JCtop
= 16.8°C/W,
θ
JB
= 5.9°C/W, WEIGHT = 0.5g
θ
VALUES DETERMINED PER JEDEC 51-9, 51-12
ORDER INFORMATION
PART MARKING*
PART NUMBER
LTM8053EY#PBF
LTM8053IY#PBF
LTM8053EY-1#PBF
LTM8053IY-1#PBF
TERMINAL FINISH
SAC305 (RoHS)
SAC305 (RoHS)
DEVICE
LTM8053
LTM8053-1
FINISH CODE
e1
e1
PACKAGE
TYPE
BGA
BGA
MSL
RATING
3
3
TEMPERATURE RANGE
–40°C to 125°C
–40°C to 125°C
• Consult Marketing for parts specified with wider operating temperature
ranges. *Device temperature grade is indicated by a label on the shipping
container. Pad or ball finish code is per IPC/JEDEC J-STD-609.
•
Recommended LGA and BGA PCB Assembly and Manufacturing
Procedures
•
LGA and BGA Package and Tray Drawings
2
Rev D
For more information
www.analog.com
LTM8053/LTM8053-1
ELECTRICAL CHARACTERISTICS
PARAMETER
Minimum Input Voltage
Output DC Voltage
Peak Output DC Current
Quiescent Current Into V
IN
Quiescent Current Into BIAS
V
IN
Rising
R
FB
Open
R
FB
= 16.9kΩ, V
IN
= 40V
V
OUT
= 3.3V, f
SW
= 1MHz
RUN = 0V
BIAS = 0V, No Load, SYNC = 0V, Not Switching
BIAS = 5V, RUN = 0V
BIAS = 5V, No Load, SYNC = 0V, Not Switching
BIAS = 5V, V
OUT
= 3.3V, I
OUT
= 3.5A, f
SW
= 1MHz
5.5V < V
IN
< 36V, I
OUT
= 1A
0.1A < I
OUT
< 3.5A
I
OUT
= 3.5A
R
T
= 232kΩ
R
T
= 41.2kΩ
R
T
= 10.7kΩ
l
The
l
denotes the specifications which apply over the specified internal
operating temperature range, otherwise specifications are at T
J
= 25°C. V
IN
= 12V, RUN = 2V, unless otherwise noted.
CONDITIONS
l
MIN
TYP
0.97
15
MAX
3.4
UNITS
V
V
V
A
6
3
300
1
275
12
0.5
0.5
10
200
0.95
3
950
0.9
970
980
3.2
1.06
1
2
200
1.05
0.89
1
150
0.4
2.9
1.5
4.2
35
conditions in conjunction with board layout, the rated package thermal
resistance and other environmental factors.
Note 4:
The LTM8053/LTM8053-1 contains overtemperature protection
that is intended to protect the device during momentary overload
conditions. The internal temperature exceeds the maximum operating
junction temperature when the overtemperature protection is active.
Continuous operation above the specified maximum operating junction
temperature may impair device reliability.
Note
5.
Below this specified voltage, internal circuitry will draw power
from V
IN
.
Note 6.
PG transitions from low to high.
µA
µA
µA
µA
mA
%
%
mV
kHz
MHz
MHz
mV
V
V
µA
µA
Ω
V
V
µA
µA
V
V
µA
Line Regulation
Load Regulation
Output Voltage Ripple
Switching Frequency
Voltage at FB
Minimum BIAS Voltage
RUN Threshold Voltage
RUN Current
TR/SS Current
TR/SS Pull-Down
PG Threshold Voltage at FB (Upper)
PG Threshold Voltage at FB (Lower)
PG Leakage Current
PG Sink Current
SYNC Threshold Voltage
SYNC Voltage
SYNC Current
TR/SS = 0V
TR/SS = 0.1V
FB Falling (Note 6)
FB Rising (Note 6)
PG = 42V
PG = 0.1V
Synchronization
To Enable Spread Spectrum
SYNC = 0V
(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:
Unless otherwise noted, the absolute minimum voltage is zero.
Note 3:
The LTM8053E/LTM8053E-1 is guaranteed to meet performance
specifications from 0°C to 125°C internal. Specifications over the full
–40°C to 125°C internal operating temperature range are assured by
design, characterization and correlation with statistical process controls.
The LTM8053I/LTM8053I-1 is guaranteed to meet specifications over
the full –40°C to 125°C internal operating temperature range. Note that
the maximum internal temperature is determined by specific operating
For more information
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3
Rev D
LTM8053/LTM8053-1
TYPICAL PERFORMANCE CHARACTERISTICS
85
T
A
= 25°C, unless otherwise noted.
LTM8053 Efficiency vs Load
Current, V
OUT
= 1.5V, BIAS = 5V
LTM8053 Efficiency vs Load
Current, V
OUT
= 0.97V, BIAS = 5V
90
LTM8053 Efficiency vs Load
Current, V
OUT
= 1.2V, BIAS = 5V
90
75
EFFICIENCY (%)
EFFICIENCY (%)
80
EFFICIENCY (%)
12V
IN
24V
IN
36V
IN
0
1
2
3
LOAD CURRENT (A)
4
8053 G02
80
65
70
70
55
12V
IN
24V
IN
36V
IN
0
1
2
3
LOAD CURRENT (A)
4
8053 G01
60
60
12V
IN
24V
IN
36V
IN
0
1
2
3
LOAD CURRENT (A)
4
8053 G03
45
50
50
90
LTM8053 Efficiency vs Load
Current, V
OUT
= 1.8V, BIAS = 5V
90
LTM8053 Efficiency vs Load
Current, V
OUT
= 2V, BIAS = 5V
90
LTM8053 Efficiency vs Load
Current, V
OUT
= 2.5V, BIAS = 5V
80
EFFICIENCY (%)
EFFICIENCY (%)
80
EFFICIENCY (%)
80
70
70
70
60
12V
IN
24V
IN
36V
IN
0
1
2
3
LOAD CURRENT (A)
4
8053 G04
60
12V
IN
24V
IN
36V
IN
0
1
2
3
LOAD CURRENT (A)
4
8053 G05
60
12V
IN
24V
IN
36V
IN
0
1
2
3
LOAD CURRENT (A)
4
8053 G06
50
50
55
95
LTM8053 Efficiency vs Load
Current, V
OUT
= 3.3V, BIAS = 5V
95
LTM8053 Efficiency vs Load
Current, V
OUT
= 5V, BIAS = 5V
95
LTM8053 Efficiency vs Load
Current, V
OUT
= 8V, BIAS = 5V
85
EFFICIENCY (%)
EFFICIENCY (%)
85
EFFICIENCY (%)
85
75
75
75
65
12V
IN
24V
IN
36V
IN
0
1
2
3
LOAD CURRENT (A)
4
8053 G07
65
12V
IN
24V
IN
36V
IN
0
1
2
3
LOAD CURRENT (A)
4
8053 G08
65
12V
IN
24V
IN
36V
IN
0
1
2
3
LOAD CURRENT (A)
4
8053 G09
55
55
55
4
Rev D
For more information
www.analog.com
LTM8053/LTM8053-1
TYPICAL PERFORMANCE CHARACTERISTICS
LTM8053 Efficiency vs Load
Current, V
OUT
= 12V, BIAS = 5V
95
100
T
A
= 25°C, unless otherwise noted.
LTM8053 Efficiency vs Load
Current, V
OUT
= –3.3V, BIAS Tied
to LTM8053 GND
90
LTM8053 Efficiency vs Load
Current, V
OUT
= 15V, BIAS = 5V
85
EFFICIENCY (%)
EFFICIENCY (%)
90
EFFICIENCY (%)
80
75
80
70
65
24V
IN
36V
IN
0
1
2
3
LOAD CURRENT (A)
4
8053 G10
70
24V
IN
36V
IN
0
1
2
3
LOAD CURRENT (A)
4
8053 G11
60
55
60
50
5V
IN
12V
IN
24V
IN
36V
IN
0
1
2
3
LOAD CURRENT (A)
4
8053 G12
LTM8053 Efficiency vs Load
Current, V
OUT
= –5V, BIAS Tied to
LTM8053 GND
90
90
LTM8053 Efficiency vs Load
Current, V
OUT
= –8V, BIAS Tied to
LTM8053 GND
90
LTM8053 Efficiency vs Load
Current, V
OUT
= –12V, BIAS Tied
to LTM8053 GND
80
EFFICIENCY (%)
EFFICIENCY (%)
80
EFFICIENCY (%)
5V
IN
12V
IN
24V
IN
0
1
2
3
LOAD CURRENT (A)
4
8053 G14
80
70
70
70
60
50
5V
IN
12V
IN
24V
IN
36V
IN
0
1
2
3
LOAD CURRENT (A)
4
8053 G13
60
60
5V
IN
12V
IN
24V
IN
0
1
2
LOAD CURRENT (A)
3
8053 G15
50
50
LTM8053 Efficiency vs Load
Current, V
OUT
= –15V, BIAS Tied
to LTM8053 GND
90
0.8
LTM8053 Input vs Load Current
V
OUT
= 0.97V, BIAS = 5V
12V
IN
24V
IN
36V
IN
INPUT CURRENT (A)
1.00
LTM8053 Input vs Load Current
V
OUT
= 1.2V, BIAS = 5V
12V
IN
24V
IN
36V
IN
70
INPUT CURRENT (A)
80
EFFICIENCY (%)
0.6
0.75
0.4
0.50
60
12V
IN
24V
IN
0
0.5
1
1.5
LOAD CURRENT (A)
2
2.5
8053 G16
0.2
0.25
50
0
0
2
4
LOAD CURRENT (A)
6
8053 G17
0
0
2
4
LOAD CURRENT (A)
6
8053 G18
For more information
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5
Rev D
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