LTM8003
40V , 3.5A Step-Down
IN
Silent Switcher Module
Regulator
FEATURES DESCRIPTION
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Complete Step-Down Switch Mode Power Supply The LTM 8003 is a 40V , 6A peak, 3.5A continuous
IN
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Low Noise Silent Switcher Architecture step-down Silent Switcher Module (power module)
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Wide Input Voltage Range: 3.4V to 40V regulator. The Silent Switcher architecture minimizes EMI
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Wide Output Voltage Range: 0.97V to 18V while delivering high efficiency at frequencies up to 3MHz.
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Wide Temperature Range: 40C to 150C (H-Grade) Included in the package are the switching controller, power
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3.5A Continuous Output Current, 6A peak switches, inductor, and all support components. Operating
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FMEA Compliant Pinout (LTM8003-3.3) over an input voltage range of 3.4V to 40V, the LTM8003
Output Stays at or Below Regulation Voltage During supports an output voltage range of 0.97V to 18V and a
Adjacent Pin Short or if a Pin Is Left Floating switching frequency range of 200kHz to 3MHz, each set by
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CISPR25 Class 5 Compliant a single resistor. Only the input and output filter capacitors
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Selectable Switching Frequency: 200kHz to 3MHz are needed to finish the design.
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External Synchronization
The low profile package enables utilization of unused
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Low Quiescent Current: 25A (5V )
OUT
space on the bottom of PC boards for high density point of
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Tiny, Low Profile 6.25mm 9mm 3.32mm RoHS
load regulation. The LTM8003 is packaged in a thermally
Compliant BGA Package
enhanced, compact over-molded ball grid array (BGA) pack-
age suitable for automated assembly by standard surface
mount equipment. The LTM8003 is RoHS compliant.
APPLICATIONS
All registered trademarks and trademarks are the property of their respective owners.
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Automotive Battery Regulation
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Power for Portable Products
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Distributed Supply Regulation
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Industrial Supplies
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Wall Transformer Regulation
TYPICAL APPLICATION
Efficiency, V = 5V
OUT
5V from 7V to 40V Step-Down Converter 95
OUT IN IN
12V
IN
V LTM8003
IN
V
IN
7V TO 40V
85
RUN
V
4.7F OUT
V
OUT 5V
3.5A
75
BIAS
6A PEAK
RT
47F
24.3k
41.2k
GND SYNC FB
1MHz
8003 TA01a
65
PINS NOT USED IN THIS CIRCUIT: TR/SS, PG
55
0 1 2 3 4
LOAD CURRENT (A)
8003 TA01
Rev E
1
Document Feedback For more information www.analog.com
EFFICIENCY (%)LTM8003
ABSOLUTE MAXIMUM RATINGS
(Notes 1, 2)
Maximum Internal Temperature (I-Grade) ........... 125C
V , RUN, PG Voltage .............................................. 42V
IN
Maximum Internal Temperature (H-Grade) ......... 150C
V , BIAS Voltage ................................................. 19V
OUT
Storage Temperature (I-Grade) ........................... 125C
FB, TR/SS Voltage ..................................................... 4V
Storage Temperature (H-Grade) ........... 50C to 150C
SYNC Voltage ............................................................ 6V
Peak Reflow Solder Body Temperature ............... 250C
PIN CONFIGURATION
TOP VIEW
TOP VIEW
FIXED OUTPUT VERSION
ADJUSTABLE VERSION
SYNC TR/SS SYNC TR/SS
GND
GND
A A
RT RT
GND
GND
RUN
RUN
B
B
PG
PG
C
C
BANK2 BANK2
V
V
IN IN
D
D
BANK 1 GND
BANK 1 GND
E
NC NC
E
FB
F
F
BIAS
BIAS
G
G
BANK 3 V
BANK 3 V
OUT OUT
H
H
1 2 3 4 5 6 1 2 3 4 5 6
BGA PACKAGE
BGA PACKAGE
48-LEAD (9mm 6.25mm 3.32mm) BGA PACKAGE
48-LEAD (9mm 6.25mm 3.32mm) BGA PACKAGE
T = 150C, = 24.7C/W, = 4.5C/W
T = 150C, = 24.7C/W, = 4.5C/W
JMAX JA JCbottom JMAX JA JCbottom
= 22.3C/W, = 4.2C/W, WEIGHT = 0.5g = 22.3C/W, = 4.2C/W, WEIGHT = 0.5g
JCtop JB
JCtop JB
VALUES DETERMINED PER JEDEC51-9, 51-12
VALUES DETERMINED PER JEDEC51-9, 51-12
ORDER INFORMATION
PART MARKING*
PACKAGE MSL
PART NUMBER TERMINAL FINISH DEVICE FINISH CODE TYPE RATING TEMPERATURE RANGE
LTM8003IY#PBF SAC305 (RoHS) LTM8003 e1 BGA 3 40C to 125C
LTM8003HY#PBF SAC305 (RoHS) LTM8003 e1 BGA 3 40C to 150C
LTM8003IY SnPb (63/37) LTM8003 e0 BGA 3 40C to 125C
LTM8003HY SnPb (63/37) LTM8003 e0 BGA 3 40C to 150C
LTM8003IY-3.3#PBF SAC305 (RoHS) LTM8003-3.3 e1 BGA 3 40C to 125C
LTM8003HY-3.3#PBF SAC305 (RoHS) LTM8003-3.3 e1 BGA 3 40C to 150C
Device temperature grade is indicated by a label on the shipping container. This product is not recommended for second side reflow.
This product is moisture sensitive. For more information, go to
Pad or ball finish code is per IPC/JEDEC J-STD-609.
Recommended BGA PCB Assembly and Manufacturing Procedures.
BGA Package and Tray Drawings
Rev E
2
For more information www.analog.com