LTM8003
40V
IN
, 3.5A Step-Down
Silent Switcher µModule
Regulator
FEATURES
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DESCRIPTION
The
LTM
®
8003
is a 40V
IN
, 6A peak, 3.5A continuous
step-down Silent Switcher µModule
®
(power module)
regulator. The Silent Switcher architecture minimizes EMI
while delivering high efficiency at frequencies up to 3MHz.
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 LTM8003
supports an output voltage range of 0.97V to 18V and a
switching frequency range of 200kHz to 3MHz, each set by
a single resistor. Only the input and output filter capacitors
are needed to finish the design.
The low profile package enables utilization of unused
space on the bottom of PC boards for high density point of
load regulation. The LTM8003 is packaged in a thermally
enhanced, compact over-molded ball grid array (BGA) pack-
age suitable for automated assembly by standard surface
mount equipment. The LTM8003 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 18V
Wide Temperature Range: –40°C to 150°C (H-Grade)
3.5A Continuous Output Current, 6A peak
FMEA Compliant Pinout (LTM8003-3.3)
Output Stays at or Below Regulation Voltage During
Adjacent Pin Short or if a Pin Is Left Floating
CISPR25 Class 5 Compliant
Selectable Switching Frequency: 200kHz to 3MHz
External Synchronization
Low Quiescent Current: 25µA (5V
OUT
)
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
V
IN
7V TO 40V
4.7µF
RT
41.2k
1MHz
GND
SYNC
V
IN
RUN
V
OUT
BIAS
FB
24.3k
47µF
8003 TA01a
Efficiency, V
OUT
= 5V
95
12V
IN
LTM8003
85
EFFICIENCY (%)
V
OUT
5V
3.5A
6A PEAK
75
65
PINS NOT USED IN THIS CIRCUIT: TR/SS, PG
55
0
1
2
3
LOAD CURRENT (A)
4
8003 TA01
Rev E
Document Feedback
For more information
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1
LTM8003
ABSOLUTE MAXIMUM RATINGS
(Notes 1, 2)
V
IN
, RUN, PG Voltage .............................................. 42V
V
OUT
, BIAS Voltage ................................................. 19V
FB, TR/SS Voltage ..................................................... 4V
SYNC Voltage ............................................................ 6V
Maximum Internal Temperature (I-Grade) ........... 125°C
Maximum Internal Temperature (H-Grade) ......... 150°C
Storage Temperature (I-Grade) ........................... 125°C
Storage Temperature (H-Grade) ........... –50°C to 150°C
Peak Reflow Solder Body Temperature ............... 250°C
PIN CONFIGURATION
TOP VIEW
ADJUSTABLE VERSION
SYNC TR/SS
A
GND
B
PG
C
D
BANK 1 GND
E
FB
F
BIAS
G
BANK 3 V
OUT
H
1
2
3
4
5
6
H
1
2
3
4
5
6
G
BANK 3 V
OUT
F
BIAS
NC
E
BANK2
V
IN
C
D
BANK 1 GND
NC
RT
RUN
B
PG
BANK2
V
IN
GND
A
GND
TOP VIEW
FIXED OUTPUT VERSION
SYNC TR/SS
RT
RUN
GND
BGA PACKAGE
48-LEAD (9mm × 6.25mm × 3.32mm) BGA PACKAGE
T
JMAX
= 150°C,
θ
JA
= 24.7°C/W,
θ
JCbottom
= 4.5°C/W
θ
JCtop
= 22.3°C/W,
θ
JB
= 4.2°C/W, WEIGHT = 0.5g
θ
VALUES DETERMINED PER JEDEC51-9, 51-12
BGA PACKAGE
48-LEAD (9mm × 6.25mm × 3.32mm) BGA PACKAGE
T
JMAX
= 150°C,
θ
JA
= 24.7°C/W,
θ
JCbottom
= 4.5°C/W
θ
JCtop
= 22.3°C/W,
θ
JB
= 4.2°C/W, WEIGHT = 0.5g
θ
VALUES DETERMINED PER JEDEC51-9, 51-12
ORDER INFORMATION
PART MARKING*
PART NUMBER
LTM8003IY#PBF
LTM8003HY#PBF
LTM8003IY
LTM8003HY
LTM8003IY-3.3#PBF
LTM8003HY-3.3#PBF
TERMINAL FINISH
SAC305 (RoHS)
SAC305 (RoHS)
SnPb (63/37)
SnPb (63/37)
SAC305 (RoHS)
SAC305 (RoHS)
DEVICE
LTM8003
LTM8003
LTM8003
LTM8003
LTM8003-3.3
LTM8003-3.3
FINISH CODE
e1
e1
e0
e0
e1
e1
PACKAGE
TYPE
BGA
BGA
BGA
BGA
BGA
BGA
MSL
RATING
3
3
3
3
3
3
TEMPERATURE RANGE
–40°C to 125°C
–40°C to 150°C
–40°C to 125°C
–40°C to 150°C
–40°C to 125°C
–40°C to 150°C
• Device temperature grade is indicated by a label on the shipping container.
• Pad or ball finish code is per IPC/JEDEC J-STD-609.
•
BGA Package and Tray Drawings
• This product is not recommended for second side reflow.
This product is moisture sensitive. For more information, go to
Recommended BGA PCB Assembly and Manufacturing Procedures.
Rev E
2
For more information
www.analog.com
LTM8003
The
l
denotes the specifications which apply over the specified operating
temperature range, otherwise specifications are at T
J
= 25°C. V
IN
= 12V, RUN = 2V, unless otherwise noted.
PARAMETER
Minimum Input Voltage
Output DC Voltage
CONDITIONS
V
IN
Rising
LTM8003, R
FB
Open
LTM8003, R
FB
= 5.62kΩ, V
IN
= 40V
LTM8003-3.3
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
LTM8003
(Note 5)
0.9
TR/SS = 0V
TR/SS = 0.1V
FB Falling (Note 6, LTM8003)
FB Rising (Note 6, LTM8003)
V
OUT
Falling (Note 6, LTM8003-3.3)
V
OUT
Rising (Note 6, LTM8003-3.3)
PG = 42V
PG = 0.1V
Synchronization
To Enable Spread Spectrum
SYNC = 0V
0.4
2.9
150
1.5
4.2
35
2
200
1.05
0.89
3.57
3.03
1
l
l
ELECTRICAL CHARACTERISTICS
MIN
TYP
0.97
18
3.3
MAX
3.4
UNITS
V
V
Peak Output DC Current
Quiescent Current into V
IN
Quiescent Current into BIAS
6
3
8
1
5
12
0.5
0.5
10
200
0.95
3
950
970
980
3.2
1.06
1
A
µA
µA
µA
µA
mA
%
%
mV
kHz
MHz
MHz
mV
V
V
µA
µA
Ω
V
V
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 Threshold Voltage at V
OUT
(Upper)
PG Threshold Voltage at V
OUT
(Lower)
PG Leakage Current
PG Sink Current
SYNC Threshold Voltage
SYNC Voltage
SYNC Current
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 LTM8003I is guaranteed to meet specifications over the full
–40°C to 125°C internal operating temperature range. The LTM8003H
is guaranteed to meet specifications over the full –40°C to 150°C
internal operating temperature range. Note that the maximum internal
temperature is determined by specific operating conditions in conjunction
with board layout, the rated package thermal resistance and other
environmental factors. High junction temperatures degrade operating
lifetimes. Operating lifetime is derated at junction temperatures greater
than 125°C.
Note 4:
The LTM8003 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.
Rev E
For more information
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3
LTM8003
TYPICAL PERFORMANCE CHARACTERISTICS
85
T
A
= 25°C, unless otherwise noted.
Efficiency vs Load Current,
V
OUT
= 1.5V, BIAS = 5V
Efficiency vs Load Current,
V
OUT
= 0.97V, BIAS = 5V
90
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
8003 G02
80
65
70
70
55
12V
IN
24V
IN
36V
IN
0
1
2
3
LOAD CURRENT (A)
4
8003 G01
60
60
12V
IN
24V
IN
36V
IN
0
1
2
3
LOAD CURRENT (A)
4
8003 G03
45
50
50
Efficiency vs Load Current,
V
OUT
= 1.8V, BIAS = 5V
90
90
Efficiency vs Load Current,
V
OUT
= 2V, BIAS = 5V
90
Efficiency vs Load Current,
V
OUT
= 2.5V, BIAS = 5V
80
EFFICIENCY (%)
EFFICIENCY (%)
80
EFFICIENCY (%)
12V
IN
24V
IN
36V
IN
0
1
2
3
LOAD CURRENT (A)
4
8003 G05
80
70
70
70
60
12V
IN
24V
IN
36V
IN
0
1
2
3
LOAD CURRENT (A)
4
8003 G04
60
60
12V
IN
24V
IN
36V
IN
0
1
2
3
LOAD CURRENT (A)
4
8003 G06
50
50
55
Efficiency vs Load Current,
V
OUT
= 3.3V, BIAS = 5V
95
95
Efficiency vs Load Current,
V
OUT
= 5V, BIAS = 5V
95
Efficiency vs Load Current,
V
OUT
= 8V, BIAS = 5V
85
EFFICIENCY (%)
EFFICIENCY (%)
85
EFFICIENCY (%)
12V
IN
24V
IN
36V
IN
0
1
2
3
LOAD CURRENT (A)
4
8003 G08
85
75
75
75
65
12V
IN
24V
IN
36V
IN
0
1
2
3
LOAD CURRENT (A)
4
8003 G07
65
65
12V
IN
24V
IN
36V
IN
0
1
2
3
LOAD CURRENT (A)
4
8003 G09
55
55
55
Rev E
4
For more information
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LTM8003
TYPICAL PERFORMANCE CHARACTERISTICS
95
T
A
= 25°C, unless otherwise noted.
Efficiency vs Load Current,
V
OUT
= 18V, BIAS = 5V
Efficiency vs Load Current,
V
OUT
= 12V, BIAS = 5V
100
Efficiency vs Load Current,
V
OUT
= 15V, BIAS = 5V
100
85
EFFICIENCY (%)
EFFICIENCY (%)
90
EFFICIENCY (%)
24V
IN
36V
IN
4
8003 G10
90
75
80
80
65
24V
IN
36V
IN
55
0
1
2
3
LOAD CURRENT (A)
70
70
24V
IN
36V
IN
4
8003 G11
60
0
1
2
3
LOAD CURRENT (A)
60
0
1
2
3
LOAD CURRENT (A)
4
8003 G12
Efficiency vs Load Current,
V
OUT
= –3.3V, BIAS Tied to
LTM8003 GND
90
90
Efficiency vs Load Current,
V
OUT
= –5V, BIAS Tied to
LTM8003 GND
90
Efficiency vs Load Current,
V
OUT
= –8V, BIAS Tied to
LTM8003 GND
80
EFFICIENCY (%)
EFFICIENCY (%)
80
EFFICIENCY (%)
5V
IN
12V
IN
24V
IN
36V
IN
0
1
2
3
LOAD CURRENT (A)
4
8003 G14
80
70
70
70
60
50
5V
IN
12V
IN
24V
IN
36V
IN
0
1
2
3
LOAD CURRENT (A)
4
8003 G13
60
60
5V
IN
12V
IN
24V
IN
0
1
2
3
LOAD CURRENT (A)
4
8003 G15
50
50
Efficiency vs Load Current,
V
OUT
= –12V, BIAS Tied to
LTM8003 GND
90
90
Efficiency vs Load Current,
V
OUT
= –15V, BIAS Tied to
LTM8003 GND
90
Efficiency vs Load Current,
V
OUT
= –18V, BIAS Tied to
LTM8003 GND
80
EFFICIENCY (%)
EFFICIENCY (%)
80
EFFICIENCY (%)
12V
IN
24V
IN
80
70
70
70
60
5V
IN
12V
IN
24V
IN
0
1
2
LOAD CURRENT (A)
3
8003 G16
60
60
12V
IN
24V
IN
50
50
0
0.5
1
1.5
LOAD CURRENT (A)
2
2.5
8003 G17
50
0
0.5
1
1.5
LOAD CURRENT (A)
2
8003 G18
Rev E
For more information
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5
