LTM8002
40V
IN
, 2.5A Silent Switcher
µModule Regulator
FEATURES
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DESCRIPTION
The
LTM
®
8002
is a 40V
IN
, 2.5A 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 LTM8002 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 LTM8002 is packaged in a thermally
enhanced, compact over-molded ball grid array (BGA)
package suitable for automated assembly by standard
surface mount equipment. The LTM8002 is available with
SnPb or RoHS compliant terminal finish.
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)
2.8A Continuous for 5V
OUT
, 12V
IN
, 2MHz at 105°C
(H-Grade)
3.5A Peak
FMEA Compliant Pinout
Output Stays at or Below Regulation Voltage During
Adjacent Pin Short or if a Pin Is Left Floating
Selectable Switching Frequency: 200kHz to 3MHz
External Synchronization
Low Quiescent Current: 25µA (5V
OUT
)
Programmable Soft-Start
Tiny, Low Profile 6.25mm × 6.25mm × 2.22mm
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
2.2µF
RT
41.2k
1MHz
GND
SYNC
MAXIMUM LOAD CURRENT (A)
V
IN
RUN
V
OUT
BIAS
FB
24.3k
22µF
8002 TA01a
Derating, H-Grade, BIAS = 5V,
DC2501A Demo Board
4
LTM8002
3
V
OUT
5V
3.5A PEAK
2
1
0 LFM
f
SW
= 2MHz
12V
IN
0
25
50
75
100
125
AMBIENT TEMPERATURE (°C)
150
PINS NOT USED IN THIS CIRCUIT: TR/SS, PG
0
8002 TA01b
Rev 0
Document Feedback
For more information
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1
LTM8002
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) ............. –55°C to 125°C
Storage Temperature (H-Grade) ........... –55°C to 150°C
Peak Reflow Solder Body Temperature ............... 260°C
PIN CONFIGURATION
TOP VIEW
ADJUSTABLE VERSION
SYNC TR/SS
A
PG
B
NC
C
GND
D
FB
E
BIAS
F
G
1
2
3
4
5
6
7
GND
BANK 2
V
OUT
F
G
1
2
3
4
5
6
7
BANK 1
E
BIAS
GND
BANK 2
V
OUT
NC
D
BANK 1
V
IN
C
GND
NC
RT
RUN
B
NC
V
IN
GND
A
PG
TOP VIEW
FIXED OUTPUT VERSION
SYNC TR/SS
RT
RUN
GND
BGA PACKAGE
49-LEAD (6.25mm × 6.25mm × 2.22mm) BGA PACKAGE
T
JMAX
= 150°C,
θ
JA
= 21.1°C/W,
θ
JCbottom
= 5.9°C/W
θ
JCtop
= 24.4°C/W,
θ
JB
= 4.4°C/W, WEIGHT = 0.5g
θ
VALUES DETERMINED PER JEDEC51-9, 51-12
BGA PACKAGE
49-LEAD (6.25mm × 6.25mm × 2.22mm) BGA PACKAGE
T
JMAX
= 150°C,
θ
JA
= 21.1°C/W,
θ
JCbottom
= 5.9°C/W
θ
JCtop
= 24.4°C/W,
θ
JB
= 4.4°C/W, WEIGHT = 0.5g
θ
VALUES DETERMINED PER JEDEC51-9, 51-12
ORDER INFORMATION
PART NUMBER
LTM8002IY#PBF
LTM8002HY#PBF
LTM8002HY
LTM8002IY-3.3#PBF
LTM8002HY-3.3#PBF
TERMINAL FINISH
SAC305 (RoHS)
SAC305 (RoHS)
SnPb (63/37)
SAC305 (RoHS)
SAC305 (RoHS)
http://www.linear.com/product/LTM8002#orderinfo
PART MARKING*
DEVICE
LTM8002
LTM8002
LTM8002
LTM8002-3.3
LTM8002-3.3
FINISH CODE
e1
e1
e0
e1
e1
PACKAGE
TYPE
BGA
BGA
BGA
BGA
BGA
MSL
RATING
3
3
3
3
3
TEMPERATURE RANGE
–40°C to 125°C
–40°C to 150°C
–40°C to 150°C
–40°C to 125°C
–40°C to 150°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.
• Terminal Finish Part Marking:
www.linear.com/leadfree
• Recommended BGA PCB Assembly and Manufacturing Procedures:
www.linear.com/umodule/pcbassembly
• BGA Package and Tray Drawings:
www.linear.com/packaging
Rev 0
2
For more information
www.analog.com
LTM8002
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
LTM8002, R
FB
Open
LTM8002, R
FB
= 5.62kΩ, V
IN
= 40V
LTM8002-3.3
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
= 2.5A, f
SW
= 1MHz
5.5V < V
IN
< 36V, I
OUT
= 1A
0.1A < I
OUT
< 2.5A
I
OUT
= 2.5A
R
T
= 232kΩ
R
T
= 41.2kΩ
R
T
= 10.7kΩ
LTM8002
(Note 5)
0.9
TR/SS = 0V
TR/SS = 0.1V
FB Falling (Note 6, LTM8002)
FB Rising (Note 6, LTM8002)
VOUT Falling (Note 6, LTM8002-3.3)
VOUT Rising (Note 6, LTM8002-3.3)
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
V
A
Peak Output DC Current
Quiescent Current into V
IN
Quiescent Current into BIAS
3.5
3
8
1
5
12
0.5
0.5
10
200
1
3
950
970
980
3.2
1.06
1
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 LTM8002I is guaranteed to meet specifications over the full
–40°C to 125°C internal operating temperature range. The LTM8002H
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 LTM8002 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 0
For more information
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3
LTM8002
TYPICAL PERFORMANCE CHARACTERISTICS
Efficiency, V
OUT
= 0.97V,
BIAS = 5V
85
T
A
= 25°C, unless otherwise noted.
Efficiency, V
OUT
= 1.5V,
BIAS = 5V
90
Efficiency, V
OUT
= 1.2V,
BIAS = 5V
85
75
EFFICIENCY (%)
75
EFFICIENCY (%)
EFFICIENCY (%)
80
65
65
70
55
12V
IN
24V
IN
36V
IN
0
1
2
LOAD CURRENT (A)
3
8002 G01
55
12V
IN
24V
IN
36V
IN
0
1
2
LOAD CURRENT (A)
3
8003 G02
60
45
12V
IN
24V
IN
36V
IN
0
1
2
LOAD CURRENT (A)
3
8003 G03
45
50
Efficiency, V
OUT
= 1.8V,
BIAS = 5V
90
90
Efficiency, V
OUT
= 2V,
BIAS = 5V
90
Efficiency, 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
LOAD CURRENT (A)
3
8002 G04
60
12V
IN
24V
IN
36V
IN
0
1
2
LOAD CURRENT (A)
3
8002 G05
60
12V
IN
24V
IN
36V
IN
0
1
2
LOAD CURRENT (A)
3
8002 G06
50
50
50
Efficiency, V
OUT
= 3.3V,
BIAS = 5V
95
95
Efficiency, V
OUT
= 5V,
BIAS = 5V
100
Efficiency, V
OUT
= 8V,
BIAS = 5V
85
EFFICIENCY (%)
EFFICIENCY (%)
85
EFFICIENCY (%)
12V
IN
24V
IN
36V
IN
0
1
2
LOAD CURRENT (A)
3
8002 G08
90
75
75
80
65
12V
IN
24V
IN
36V
IN
0
1
2
LOAD CURRENT (A)
3
8002 G07
65
70
12V
IN
24V
IN
36V
IN
0
1
2
LOAD CURRENT (A)
3
8002 G09
55
55
60
Rev 0
4
For more information
www.analog.com
LTM8002
TYPICAL PERFORMANCE CHARACTERISTICS
Efficiency, V
OUT
= 12V,
BIAS = 5V
100
100
T
A
= 25°C, unless otherwise noted.
Efficiency, V
OUT
= 18V,
BIAS = 5V
100
Efficiency, V
OUT
= 15V,
BIAS = 5V
90
EFFICIENCY (%)
EFFICIENCY (%)
90
EFFICIENCY (%)
24V
IN
36V
IN
0
1
2
LOAD CURRENT (A)
3
8002 G11
90
80
80
80
70
24V
IN
36V
IN
0
1
2
LOAD CURRENT (A)
3
8002 G10
70
70
24V
IN
36V
IN
0
1
2
LOAD CURRENT (A)
3
8002 G12
60
60
60
Efficiency, V
OUT
= –3.3V,
BIAS Tied to LTM8002 GND
85
90
Efficiency, V
OUT
= –5V,
BIAS Tied to LTM8002 GND
90
Efficiency, V
OUT
= –8V,
BIAS Tied to LTM8002 GND
80
EFFICIENCY (%)
EFFICIENCY (%)
80
EFFICIENCY (%)
12V
IN
24V
IN
0
1
2
LOAD CURRENT (A)
3
8002 G14
80
75
70
70
70
65
60
12V
IN
24V
IN
35V
IN
0
1
2
LOAD CURRENT (A)
3
8002 G13
60
12V
IN
24V
IN
0
1
2
LOAD CURRENT (A)
3
8002 G15
60
50
50
Efficiency, V
OUT
= –12V,
BIAS Tied to LTM8002 GND
85
90
Efficiency, V
OUT
= –15V,
BIAS Tied to LTM8002 GND
85
Efficiency, V
OUT
= –18V,
BIAS Tied to LTM8002 GND
80
EFFICIENCY (%)
EFFICIENCY (%)
80
EFFICIENCY (%)
12V
IN
24V
IN
0
0.5
1
LOAD CURRENT (A)
1.5
8002 G17
80
75
75
70
70
70
65
12V
IN
24V
IN
0
0.5
1
1.5
LOAD CURRENT (A)
2
8002 G16
60
65
12V
IN
0
0.25
0.50
0.75
LOAD CURRENT (A)
1
1.25
8002 G18
60
50
60
Rev 0
For more information
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5
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