LTM8025
36V, 3A Step-Down
µModule Regulator
FeaTures
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DescripTion
The
LTM
®
8025
is a 36V
IN
, 3A step down µModule
®
(mi-
cromodule) converter. Included in the package are the
switching controller, power switches, inductor and all
support components. Operating over an input voltage
range of 3.6V to 36V, the LTM8025 supports an output
voltage range of 0.8V to 24V and a switching frequency
range of 200kHz to 2.4MHz, each set by a single resistor.
Only the bulk input and output filter capacitors are needed
to finish the design.
The LTM8025 is packaged in a thermally enhanced, com-
pact (9mm
×
15mm) and low profile over-molded land
grid array (LGA) and ball grid array (BGA) packages suit-
able for automated assembly by standard surface mount
equipment. The LTM8025 is available with SnPb (BGA) or
RoHS compliant terminal finish.
L,
LT, LTC, LTM, Linear Technology, the Linear logo, µModule and Burst Mode are registered
trademarks of Linear Technology Corporation. All other trademarks are the property of their
respective owners.
Complete Step-Down Switch Mode Power Supply
Wide Input Voltage Range: 3.6V to 36V
Up to 3A Output Current
Parallelable for Increased Output Current
0.8V to 24V Output Voltage
Selectable Switching Frequency: 200kHz to 2.4MHz
Current Mode Control
SnPb or RoHS Compliant Finish
Programmable Soft-Start
9mm
×
15mm
×
4.32mm LGA and 9mm
×
15mm
×
4.92mm BGA Packages
applicaTions
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Automotive Battery Regulation
Power for Portable Products
Distributed Supply Regulation
Industrial Supplies
Wall Transformer Regulation
Typical applicaTion
Efficiency
100
V
IN
*
22V TO 36V
4.7µF
V
IN
RUN/SS
LTM8025
SHARE
RT
47.5k
SYNC
GND
V
OUT
AUX
PGOOD
ADJ
34.8k
EFFICIENCY(%)
BIAS
22µF
80
70
60
50
*RUNNING VOLTAGE RANGE. PLEASE REFER TO
APPLICATIONS INFORMATION SECTION FOR START-UP DETAILS
8025 TA01a
V
IN
= 24V
V
OUT
12V AT 3A
90
40
0
500
1000 1500 2000 2500
OUTPUT CURRENT (mA)
3000
8025 TA01b
8025fc
For more information
www.linear.com/LTM8025
1
LTM8025
absoluTe MaxiMuM raTings
(Note 1)
V
IN
, RUN/SS Voltage .................................................36V
ADJ, RT, SHARE Voltage .............................................6V
V
OUT
, AUX .................................................................25V
PGOOD, SYNC...........................................................30V
BIAS ..........................................................................25V
V
IN
+ BIAS .................................................................56V
Maximum Junction Temperature (Note 2) ............ 125°C
Solder Temperature............................................... 245°C
pin conFiguraTion
1
A
BANK 1
B
C
D
E
BANK 2
F
G
H
J
BANK 3
K
L
V
IN
RUN/SS SYNC
LGA PACKAGE
70-PIN (9mm
×
15mm
×
4.32mm)
T
JMAX
= 125°C,
θ
JA
= 24.4°C/W,
θ
JC(BOTTOM)
= 11.5°C/W,
θ
JC(TOP)
= 42.7°C/W,
θ
JB
= 18.7°C/W
θ
VALUES DETERMINED PER JESD51-9, MAX OUTPUT POWER
WEIGHT = 1.8 GRAMS
AUX
BIAS
RT
SHARE
PGOOD
ADJ
BANK 3
BANK 2
BANK 1
2
3
4
5
6
GND
7
A
B
C
D
E
F
G
H
J
K
L
V
IN
RUN/SS SYNC
BGA PACKAGE
70-PIN (9mm
×
15mm
×
4.92mm)
T
JMAX
= 125°C,
θ
JA
= 24.4°C/W,
θ
JC(BOTTOM)
= 11.5°C/W,
θ
JC(TOP)
= 42.7°C/W,
θ
JB
= 18.7°C/W
θ
VALUES DETERMINED PER JESD51-9, MAX OUTPUT POWER
WEIGHT = 1.8 GRAMS
AUX
BIAS
RT
SHARE
PGOOD
ADJ
1
V
OUT
2
3
V
OUT
4
5
6
7
GND
orDer inForMaTion
PART NUMBER
LTM8025EV#PBF
LTM8025IV#PBF
LTM8025MPV#PBF
LTM8025EY#PBF
LTM8025IY#PBF
LTM8025IY
LTM8025MPY#PBF
LTM8025MPY
PAD OR BALL FINISH
Au (RoHS)
Au (RoHS)
Au (RoHS)
SAC305 (RoHS)
SAC305 (RoHS)
SnPb (63/37)
SAC305 (RoHS)
SnPb (63/37)
PART MARKING*
DEVICE
LTM8025V
LTM8025V
LTM8025MPV
LTM8025Y
LTM8025Y
LTM8025Y
LTM8025Y
LTM8025Y
FINISH CODE
e4
e4
e4
e1
e1
e0
e1
e0
PACKAGE
TYPE
LGA
LGA
LGA
BGA
BGA
BGA
BGA
BGA
MSL
RATING
3
3
3
3
3
3
3
3
TEMPERATURE RANGE
(Note 2)
–40°C to 125°C
–40°C to 125°C
–55°C to 125°C
–40°C to 125°C
–40°C to 125°C
–40°C to 125°C
–55°C to 125°C
–55°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.
• Terminal Finish Part Marking:
www.linear.com/leadfree
• Recommended LGA and BGA PCB Assembly and Manufacturing
Procedures:
www.linear.com/umodule/pcbassembly
• LGA and BGA Package and Tray Drawings:
www.linear.com/packaging
8025fc
2
For more information
www.linear.com/LTM8025
LTM8025
elecTrical characTerisTics
PARAMETER
Minimum Input Voltage
Output DC Voltage
Output DC Current
Quiescent Current into V
IN
Quiescent Current into BIAS
0 < I
OUT
≤ 3A; R
ADJ
Open
0 < I
OUT
≤ 3A; R
ADJ
= 16.9k; V
IN
= 32V
V
OUT
= 3.3V
RUN/SS = 0V
Not Switching
BIAS = 0V, Not Switching
RUN/SS = 0V
Not Switching
BIAS = 0V, Not Switching
5.5V < V
IN
< 36V, I
OUT
= 1A
0A < I
OUT
< 3A
0A < I
OUT
< 3A
R
T
= 45.3k
l
The
l
denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at T
A
= 25°C. V
IN
= 12V, RUN/SS = 12V, BIAS = 3V unless otherwise noted. (Note 2)
CONDITIONS
l
MIN
TYP
0.8
24
MAX
3.6
UNITS
V
V
V
0
0.01
25
85
0.01
65
0
0.3
0.4
10
775
775
770
790
2
2
3
1
60
150
0.5
120
5
A
µA
µA
µA
µA
µA
µA
%
%
mV
kHz
Line Regulation
Load Regulation
Output Voltage Ripple (RMS)
Switching Frequency
Voltage (at ADJ Pin)
Current Out of ADJ Pin
Minimum BIAS Voltage for Proper Operation
RUN/SS Pin Current
RUN Input High Voltage
RUN Input Low Voltage
PGOOD Threshold (at ADJ Pin)
PGOOD Leakage Current
PGOOD Sink Current
SYNC Input Low Threshold
SYNC Input High Threshold
SYNC Bias Current
805
810
2.8
10
0.2
mV
mV
µA
V
µA
V
V
mV
µA
µA
V
V
µA
ADJ = 1V, V
OUT
= 0V
RUN/SS = 2.5V
2.5
V
OUT
Rising
PGOOD = 30V
PGOOD = 0.4V
f
SYNC
= 550kHz
f
SYNC
= 550kHz
SYNC = 0V
0.7
200
5
710
0.1
700
0.5
0.1
1
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 LTM8025E 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
LTM8025I is guaranteed to meet specifications over the full –40°C
to 125°C internal operating temperature range. The LTM8025MP is
guaranteed to meet specifications over the full –55°C to 125°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.
8025fc
For more information
www.linear.com/LTM8025
3
LTM8025
Typical perForMance characTerisTics
100
90
80
70
60
50
40
5V
IN
12V
IN
24V
IN
32V
IN
0
500
1000 1500 2000 2500
LOAD CURRENT (mA)
3000
T
A
= 25°C, unless otherwise noted.
2.5V
OUT
Efficiency
100
90
80
70
60
50
40
3.3V
OUT
Efficiency
100
90
80
70
60
50
40
5V
OUT
Efficiency
EFFICIENCY(%)
EFFICIENCY(%)
5.5V
IN
12V
IN
24V
IN
32V
IN
0
500
1000 1500 2000 2500
LOAD CURRENT (mA)
3000
EFFICIENCY(%)
12V
IN
24V
IN
32V
IN
0
500
1000 1500 2000 2500
LOAD CURRENT (mA)
3000
8025 G01
8025 G02
8025 G03
100
90
80
70
60
50
40
8V
OUT
Efficiency
100
90
80
70
60
50
40
12V
OUT
Efficiency
100
90
80
70
60
50
40
18V
OUT
Efficiency
EFFICIENCY(%)
EFFICIENCY(%)
12V
IN
24V
IN
32V
IN
0
500
1000 1500 2000 2500
LOAD CURRENT (mA)
3000
16V
IN
24V
IN
32V
IN
0
500
1000 1500 2000 2500
LOAD CURRENT (mA)
3000
EFFICIENCY(%)
24V
IN
32V
IN
0
500
1000 1500 2000 2500
LOAD CURRENT (mA)
3000
8025 G04
8025 G05
8025 G06
Bias Current vs Load Current
2.5V
OUT
25
12V
IN
24V
IN
30
25
BIAS CURRENT (mA)
20
15
10
5
0
Bias Current vs Load Current
3.3V
OUT
12V
IN
24V
IN
40
35
BIAS CURRENT (mA)
30
25
20
15
10
5
0
1000
2000
LOAD CURRENT (mA)
3000
8025 G08
Bias Current vs Load Current
5V
OUT
12V
IN
24V
IN
20
BIAS CURRENT (mA)
15
10
5
0
0
1000
2000
LOAD CURRENT (mA)
3000
8025 G07
0
0
1000
2000
LOAD CURRENT (mA)
3000
8025 G09
8025fc
4
For more information
www.linear.com/LTM8025
LTM8025
Typical perForMance characTerisTics
Bias Current vs Load Current
8V
OUT
80
70
BIAS CURRENT (mA)
60
50
40
30
20
10
0
0
1000
2000
LOAD CURRENT (mA)
3000
8025 G10
T
A
= 25°C, unless otherwise noted.
Bias Current vs Load Current
18V
OUT
120
100
BIAS CURRENT (mA)
80
60
40
20
0
24V
IN
Bias Current vs Load Current
12V
OUT
70
60
BIAS CURRENT (mA)
50
40
30
20
10
0
0
1000
2000
LOAD CURRENT (mA)
3000
8025 G11
12V
IN
24V
IN
24V
IN
0
500
1000
LOAD CURRENT (mA)
1500
8025 G12
Input Current vs Load Current
2.5V
OUT
2500
5V
IN
12V
IN
24V
IN
32V
IN
2500
Input Current vs Load Current
3.3V
OUT
5.5V
IN
12V
IN
24V
IN
32V
IN
1600
1400
INPUT CURRENT (mA)
1200
1000
800
600
400
200
Input Current vs Load Current
5V
OUT
12V
IN
24V
IN
32V
IN
2000
INPUT CURRENT (mA)
2000
INPUT CURRENT (mA)
1500
1500
1000
1000
500
500
0
0
1000
2000
LOAD CURRENT (mA)
3000
8025 G13
0
0
1000
2000
LOAD CURRENT (mA)
3000
8025 G14
0
0
1000
2000
LOAD CURRENT (mA)
3000
8025 G15
Input Current vs Load Current
8V
OUT
2500
12V
IN
24V
IN
32V
IN
INPUT CURRENT (mA)
3000
2500
2000
1500
1000
500
0
Input Current vs Load Current
12V
OUT
16V
IN
24V
IN
32V
IN
INPUT CURRENT (mA)
3000
2500
2000
1500
1000
500
0
Input Current vs Load Current
18V
OUT
24V
IN
32V
IN
2000
INPUT CURRENT (mA)
1500
1000
500
0
0
1000
2000
LOAD CURRENT (mA)
3000
8025 G16
0
1000
2000
LOAD CURRENT (mA)
3000
8025 G17
0
1000
2000
LOAD CURRENT (mA)
3000
8025 G18
8025fc
For more information
www.linear.com/LTM8025
5
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