FEATURES
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LTM8033
Ultralow Noise EMC 36V
IN
,
3A DC/DC µModule
Regulator
DESCRIPTION
The
LTM
®
8033
is an electromagnetic compatible (EMC)
36V, 3A DC/DC μModule
®
buck converter designed to
meet the radiated emissions requirements of EN55022.
Conducted emission requirements can be met by adding
standard filter components. Included in the package are the
switching controller, power switches, inductor, filters and
all support components. Operating over an input voltage
range of 3.6V to 36V, the LTM8033 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 LTM8033 is packaged in a compact (11.25mm
×
15mm
×
4.32mm) overmolded land grid array (LGA) and ball grid
array (BGA) package suitable for automated assembly by
standard surface mount equipment. The LTM8033 is avail-
able 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.
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Complete Step-Down Switch Mode Power Supply
Wide Input Voltage Range: 3.6V to 36V
3A Output Current
0.8V to 24V Output Voltage
EN55022 Class B Compliant
Current Share Multiple LTM8033 Regulators for
More Than 3A Output
Selectable Switching Frequency: 200kHz to 2.4MHz
Current Mode Control
SnPb or RoHS Compliant Finish
Programmable Soft-Start
Compact Package (11.25mm
×
15mm
×
4.32mm)
Surface Mount LGA and (11.25mm
×
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
Ultralow Noise 12V/3A DC/DC µModule Regulator
LTM8033
V
IN
*
20V TO 36V
2.2µF
V
IN
RUN/SS
FIN
1µF
SHARE
V
OUT
AUX
BIAS
PGOOD
47µF
RT SYNC GND ADJ
41.2k
f = 850kHz
34.8k
V
OUT
12V
3A
80
70
60
50
40
30
20
10
0
30
226.2
422.4
618.6
814.8
1010
324.3
520.5
716.7
912.9
128.1
FREQUENCY (MHz)
8033 TA01a
8033 TA01b
EMI Performance
* RUNNING VOLTAGE RANGE. PLEASE REFER TO THE
APPLICATIONS INFORMATION SECTION FOR START-UP DETAILS.
8033fb
For more information
www.linear.com/LTM8033
1
LTM8033
ABSOLUTE MAXIMUM RATINGS
(Note 1)
V
IN
, FIN, RUN/SS Voltage ........................................36V
ADJ, RT, SHARE Voltage ............................................6V
V
OUT
, AUX ................................................................25V
PGOOD, SYNC ..........................................................30V
BIAS .........................................................................25V
Maximum Junction Temperature (Note 2) .......... 125°C
Solder Temperature ............................................. 245°C
PIN CONFIGURATION
TOP VIEW
GND SYNC
8
ADJ PGOOD
7
SHARE RT
6
BANK 2
5
GND
4
3
BANK 1
2
1
A
B
C
D
E
F
G
H
J
K
L
VOUT
BIAS
AUX
BANK 4
2
VIN
1
A
B
C
D
E
F
G
H
J
K
L
RUN/SS
BANK 3
FIN
GND SYNC
8
ADJ PGOOD
7
SHARE RT
6
BANK 2
5
GND
4
3
BANK 1
VOUT
BIAS
AUX
BANK 4
VIN
RUN/SS
BANK 3
FIN
TOP VIEW
LGA PACKAGE
76-LEAD (15mm
×
11.25mm
×
4.32mm)
T
JMAX
= 125°C,
θ
JA
= 15.4°C/W,
θ
JCbottom
= 5.2°C/W,
θ
JB
= 9.8°C/W,
θ
JCtop
= 16.7°C/W
θ
VALUES DERIVED FROM A 4 LAYER 6.35cm
×
6.35cm PCB
WEIGHT = 2.2g
BGA PACKAGE
76-LEAD (15mm
×
11.25mm
×
4.92mm)
T
JMAX
= 125°C,
θ
JA
= 15.4°C/W,
θ
JCbottom
= 5.2°C/W,
θ
JB
= 9.8°C/W,
θ
JCtop
= 16.7°C/W
θ
VALUES DERIVED FROM A 4 LAYER 6.35cm
×
6.35cm PCB
WEIGHT = 2.2g
ORDER INFORMATION
PART MARKING*
PART NUMBER
LTM8033EV#PBF
LTM8033IV#PBF
LTM8033MPV#PBF
LTM8033EY#PBF
LTM8033IY#PBF
LTM8033IY
LTM8033MPY#PBF
LTM8033MPY
PAD OR BALL FINISH
Au (RoHS)
Au (RoHS)
Au (RoHS)
SAC305 (RoHS)
SAC305 (RoHS)
SnPb (63/67)
SAC305 (RoHS)
SnPb (63/67)
DEVICE
LTM8033V
LTM8033V
LTM8033V
LTM8033Y
LTM8033Y
LTM8033Y
LTM8033Y
LTM8033Y
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
8033fb
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For more information
www.linear.com/LTM8033
LTM8033
ELECTRICAL CHARACTERISTICS
PARAMETER
Minimum Input Voltage
Output DC Voltage
Output DC Current
Quiescent Current into V
IN
Quiescent Current into BIAS
0A < I
OUT
< 3A, R
ADJ
Open, V
IN
= 24V
0A < I
OUT
< 3A, R
ADJ
= 16.5k, V
IN
= 32V
V
IN
= 24V
RUN/SS = 0.2V
Not Switching
BIAS = 0V, Not Switching
RUN/SS = 0.2V
Not Switching
BIAS = 0V, Not Switching
5.5V < V
IN
< 36V
0A < I
OUT
< 3A, V
IN
= 24V
V
IN
= 24V, 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 unless otherwise noted (Note 2).
CONDITIONS
l
MIN
TYP
0.8
24
MAX
3.6
UNITS
V
V
V
0
0.01
30
100
0.01
75
0
0.3
0.4
5
780
775
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 RMS Voltage Ripple
Switching Frequency
Voltage at ADJ Pin
Current Out of ADJ Pin
Minimum BIAS Voltage for Proper Operation
RUN/SS Pin Current
RUN/SS Input High Voltage
RUN/SS Input Low Voltage
PGOOD Threshold (at ADJ)
PGOOD Leakage Current
PGOOD Sink Current
SYNC Input Low Threshold
SYNC Input High Threshold
SYNC Bias Current
500kHz Narrowband Conducted Emissions
1MHz Narrowband Conducted Emissions
3MHz Narrowband Conducted Emissions
805
2.8
10
0.2
mV
µA
V
µA
V
V
mV
µA
µA
V
ADJ = 1V, V
OUT
= 0V
RUN/SS = 2.5V
2.5
V
OUT
Rising
PGOOD = 30V, RUN/SS = 0V
PGOOD = 0.4V
f
SYNC
= 550kHz
f
SYNC
= 550kHz
SYNC = 0V
24V
IN
, 3.3V
OUT
, I
OUT
= 3A, 5µH LISN
200
0.5
5
730
0.1
735
0.7
0.1
89
69
51
1
V
µA
dBµV
dBµV
dBµV
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 LTM8033E 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
LTM8033I is guaranteed to meet specifications over the full –40°C
to 125°C internal operating temperature range. The LTM8033MP 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.
8033fb
For more information
www.linear.com/LTM8033
3
LTM8033
TYPICAL PERFORMANCE CHARACTERISTICS
95
90
85
EFFICIENCY (%)
80
75
70
65
60
55
50
0
500
1000 1500 2000 2500
OUTPUT CURRENT (mA)
3000
36V
IN
24V
IN
T
A
= 25°C, unless otherwise noted.
5V
OUT
Efficiency
12V
IN
2.5V
OUT
Efficiency
5V
IN
12V
IN
EFFICIENCY (%)
90
85
80
75
70
65
60
55
50
3.3V
OUT
Efficiency
5.5V
IN
12V
IN
95
90
85
EFFICIENCY (%)
36V
IN
24V
IN
80
75
70
65
60
55
36V
IN
24V
IN
0
500
1000 1500 2000 2500
OUTPUT CURRENT (mA)
3000
50
0
500
1000 1500 2000 2500
OUTPUT CURRENT (mA)
3000
8033 G01
8033 G02
8033 G03
8V
OUT
Efficiency
95
90
85
EFFICIENCY (%)
80
75
70
65
60
55
50
0
500
1000 1500 2000 2500
OUTPUT CURRENT (mA)
3000
12V
IN
95
90
12V
OUT
Efficiency
24V
IN
36V
IN
95
90
85
EFFICIENCY (%)
80
75
70
65
60
55
0
500
1000 1500 2000 2500
OUTPUT CURRENT (mA)
3000
50
18V
OUT
Efficiency
36V
IN
36V
IN
24V
IN
EFFICIENCY (%)
85
80
75
70
65
60
55
50
0
500
1000 1500 2000 2500
OUTPUT CURRENT (mA)
3000
8033 G04
8033 G05
8033 G06
50
45
40
BIAS CURRENT (mA)
Bias Current vs Load Current,
2.5V
OUT
80
70
BIAS CURRENT (mA)
Bias Current vs Load Current,
3.3V
OUT
40
35
BIAS CURRENT (mA)
30
25
20
15
10
5
3000
0
Bias Current vs Load Current,
5V
OUT
35
30
25
20
15
10
5
0
0
500
60
50
40
30
20
10
12V
IN
24V
IN
36V
IN
0
500
1000 1500 2000 2500
LOAD CURRENT (mA)
5V
IN
5V
IN
12V
IN
24V
IN
12V
IN
24V
IN
36V
IN
1000 1500 2000 2500
LOAD CURRENT (mA)
3000
36V
IN
0
0
500
1000 1500 2000 2500
LOAD CURRENT (mA)
3000
8033 G07
8033 G08
8033 G09
8033fb
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For more information
www.linear.com/LTM8033
LTM8033
TYPICAL PERFORMANCE CHARACTERISTICS
Bias Current vs Load Current,
8V
OUT
90
80
70
BIAS CURRENT (mA)
BIAS CURRENT (mA)
60
50
40
30
20
10
0
0
500
24V
IN
36V
IN
12V
IN
80
70
BIAS CURRENT (mA)
60
50
40
30
20
10
3000
0
0
500
1000 1500 2000 2500
LOAD CURRENT (mA)
3000
24V
IN
36V
IN
T
A
= 25°C, unless otherwise noted.
Bias Current vs Load Current,
18V
OUT
Bias Current vs Load Current,
12V
OUT
90
80
70
60
50
40
30
20
10
0
36V
IN
1000 1500 2000 2500
LOAD CURRENT (mA)
0
500
1000 1500 2000 2500
LOAD CURRENT (mA)
3000
8033 G10
8033 G11
8033 G12
Input Current vs Input Voltage
Output Shorted
1000
900
800
INPUT CURRENT (mA)
700
600
500
400
300
200
100
0
0
10
20
30
INPUT VOLTAGE (V)
40
8033 G13
Input Current vs Output Current
2.5V
OUT
2500
2500
Input Current vs Output Current
3.3V
OUT
2000
INPUT CURRENT (mA)
INPUT CURRENT (mA)
2000
1500
5V
IN
1000
12V
IN
500
24V
IN
36V
IN
0
500
1000 1500 2000 2500
OUTPUT CURRENT (mA)
3000
1500
5.5V
IN
1000
12V
IN
24V
IN
36V
IN
500
0
0
0
500
1000 1500 2000 2500
OUTPUT CURRENT (mA)
3000
8033 G14
8033 G15
1600
1400
INPUT CURRENT (mA)
Input Current vs Output Current
5V
OUT
2500
Input Current vs Output Current
8V
OUT
1800
1600
Input Current vs Output Current
12V
OUT
INPUT CURRENT (mA)
INPUT CURRENT (mA)
1200
1000
800
600
400
200
0
0
500
12V
IN
2000
1400
1200
1000
800
600
400
36V
IN
200
0
0
500
1000 1500 2000 2500
OUTPUT CURRENT (mA)
3000
24V
IN
1500
12V
IN
24V
IN
36V
IN
1000
24V
IN
500
36V
IN
1000 1500 2000 2500
OUTPUT CURRENT (mA)
3000
0
0
500
1000 1500 2000 2500
OUTPUT CURRENT (mA)
3000
8033 G16
8033 G17
8033 G18
8033fb
For more information
www.linear.com/LTM8033
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