LTM8050
58V, 2A Step-Down
µModule Regulator
FEATURES
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DESCRIPTION
The
LTM
®
8050
is a 58V
IN
, 2A 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 58V, the LTM8050 supports an output
voltage range of 0.8V to 24V and a switching frequency
range of 100kHz to 2.4MHz, each set by a single resistor.
Only the bulk input and output filter capacitors are needed
to finish the design.
The LTM8050 is packaged in a 9mm
×
15mm
×
4.92mm
ball grid array (BGA) package suitable for automated
assembly by standard surface mount equipment. The
LTM8050 is available with SnPb (BGA) or RoHS compli-
ant 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.
Click to view associated TechClip Videos.
Wide Input Voltage Range: 3.6V to 58V
(60V Absolute Maximum)
Up to 2A Output Current
Parallelable for Increased Output Current
0.8V to 24V Output Voltage
Adjustable Switching Frequency: 100kHz to 2.4MHz
Configurable as an Inverter
Current Mode Control
Programmable Soft-Start
9mm
×
15mm
×
4.92mm BGA Package
APPLICATIONS
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Automotive Battery Regulation
Power for Portable Products
Distributed Supply Regulation
Industrial Supplies
Wall Transformer Regulation
TYPICAL APPLICATION
Efficiency vs Output Current, 12V
OUT
12V
OUT
, 2A µModule Regulator
V
IN
*
17V TO 58V
4.7µF
V
IN
RUN/SS
LTM8050
SHARE
RT
57.6k
f = 600kHz
SYNC
GND
V
OUT
AUX
BIAS
PGOOD
FB
34.8k
82
80
8050 TA01a
92
V
OUT
12V AT 2A
EFFICIENCY (%)
90
V
IN
= 24V
V
IN
= 36V
88
86
84
V
IN
= 48V
22µF
*RUNNING VOLTAGE RANGE. PLEASE REFER TO
APPLICATIONS INFORMATION SECTION FOR START-UP DETAILS
0
0.5
1.0
1.5
OUTPUT CURRENT (A)
2.0
8050 TA01b
8050fc
For more information
www.linear.com/LTM8050
1
LTM8050
ABSOLUTE MAXIMUM RATINGS
(Notes 1, 3)
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
AUX
BIAS
RT
SHARE
PGOOD
FB
2
TOP VIEW
3 4 5
6
GND
7
V
OUT
V
IN
, RUN/SS Voltage .................................................60V
FB, RT, SHARE Voltage ...............................................5V
V
OUT
, AUX .................................................................25V
PGOOD, SYNC, BIAS .................................................25V
V
IN
+ BIAS .................................................................72V
Maximum Junction Temperature (Note 2) ............ 125°C
Solder Temperature............................................... 245°C
Storage Temperature............................................. 125°C
BGA PACKAGE
70-PIN (15mm
×
9mm
×
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
ORDER INFORMATION
PART NUMBER
LTM8050EY#PBF
LTM8050IY#PBF
LTM8050IY
LTM8050MPY#PBF
LTM8050MPY
PAD OR BALL FINISH
SAC305 (RoHS)
SAC305 (RoHS)
SnPb (63/37)
SAC305 (RoHS)
SnPb (63/37)
http://www.linear.com/product/LTM8050#orderinfo
PART MARKING*
DEVICE
LTM8050Y
LTM8050Y
LTM8050Y
LTM8050Y
LTM8050Y
FINISH CODE
e1
e1
e0
e1
e0
PACKAGE
TYPE
BGA
BGA
BGA
BGA
BGA
MSL
RATING
3
3
3
3
3
TEMPERATURE RANGE
(SEE NOTE 2)
–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
2
8050fc
For more information
www.linear.com/LTM8050
LTM8050
ELECTRICAL CHARACTERISTICS
PARAMETER
Minimum Input Voltage
Output DC Voltage
Output DC Current
Quiescent Current into V
IN
Quiescent Current into BIAS
RUN/SS = 0V
Not Switching
BIAS = 0V, Not Switching
RUN/SS = 0V
Not Switching
BIAS = 0V, Not Switching
5.5V < V
IN
< 58V, I
OUT
= 1A
0A < I
OUT
< 2A
0A < I
OUT
< 2A
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 < I
OUT
≤ 2A; R
FB
Open
0 < I
OUT
≤ 2A; R
FB
= 16.9k; V
IN
= 32V
0
2
0.01
35
120
0.01
82
1
0.3
0.3
10
750
1
60
160
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 FB Pin)
Internal Feedback Resistor
Minimum BIAS Voltage for Proper Operation
RUN/SS Pin Current
RUN Input High Voltage
RUN Input Low Voltage
PGOOD Threshold (at FB Pin)
PGOOD Leakage Current
PGOOD Sink Current
SYNC Input Low Threshold
SYNC Input High Threshold
SYNC Bias Current
775
770
790
499
805
810
2.8
mV
mV
kΩ
V
µA
V
V
mV
µA
µA
V
V
µA
RUN/SS = 2.5V
2.5
6
10
0.2
V
OUT
Rising
PGOOD = 30V
PGOOD = 0.4V
f
SYNC
= 550kHz
f
SYNC
= 550kHz
SYNC = 0V
0.7
200
730
0.1
600
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 LTM8050E 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
LTM8050I is guaranteed to meet specifications over the full –40°C
to 125°C internal operating temperature range. The LTM8050MP 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.
Note 3:
Unless otherwise noted, the absolute minimum voltage is zero.
8050fc
For more information
www.linear.com/LTM8050
3
LTM8050
TYPICAL PERFORMANCE CHARACTERISTICS
T
A
= 25°C, unless otherwise noted.
90
85
EFFICIENCY (%)
EFFICIENCY (%)
80
75
70
65
60
Operating conditions are per Table 1 and
Efficiency vs Output Current,
5V
OUT
Efficiency vs Output Current,
2.5V
OUT
85
Efficiency vs Output Current,
3.3V
OUT
90
80
EFFICIENCY (%)
12V
IN
24V
IN
36V
IN
48V
IN
0
0.5
1.0
1.5
OUTPUT CURRENT (A)
2.0
8050 G02
85
75
80
70
75
12V
IN
24V
IN
36V
IN
48V
IN
0
0.5
1.0
1.5
OUTPUT CURRENT (A)
2.0
8050 G03
5V
IN
12V
IN
24V
IN
36V
IN
48V
IN
0
0.5
1.0
1.5
OUTPUT CURRENT (A)
2.0
8050 G01
65
70
60
65
94
92
90
Efficiency vs Output Current,
8V
OUT
92
90
EFFICIENCY (%)
Efficiency vs Output Current,
12V
OUT
94
92
EFFICIENCY (%)
24V
IN
36V
IN
48V
IN
90
88
86
84
82
Efficiency vs Output Current,
18V
OUT
EFFICIENCY (%)
88
86
84
82
80
78
76
0
0.5
1.0
1.5
OUTPUT CURRENT (A)
12V
IN
24V
IN
36V
IN
48V
IN
2.0
8050 G04
88
86
84
82
80
36V
IN
48V
IN
0
0.5
1.0
OUTPUT CURRENT (A)
1.5
8050 G06
0
0.5
1.0
1.5
OUTPUT CURRENT (A)
2.0
8050 G05
Efficiency vs Output Current,
24V
OUT
99
97
EFFICIENCY (%)
EFFICIENCY (%)
95
93
91
89
87
85
0
0.5
1.0
OUTPUT CURRENT (A)
36V
IN
48V
IN
1.5
8050 G07
Efficiency, V
OUT
≤ 2V, 2A Load,
BIAS = 5V
80
75
INPUT CURRENT (A)
70
65
60
55
50
45
1.00
1.25
1.50
V
OUT
(V)
1.75
5V
IN
12V
IN
24V
IN
36V
IN
48V
IN
2.00
8050 G08
Input Current vs Output Current
2.5V
OUT
1.4
1.2
1.0
0.8
0.6
0.4
0.2
0
0
0.5
1.0
1.5
OUTPUT CURRENT (A)
2.0
8050 G09
5V
IN
12V
IN
24V
IN
36V
IN
48V
IN
4
8050fc
For more information
www.linear.com/LTM8050
LTM8050
TYPICAL PERFORMANCE CHARACTERISTICS
T
A
= 25°C, unless otherwise noted.
0.8
0.7
INPUT CURRENT (A)
0.6
0.5
0.4
0.3
0.2
0.1
0
0
0.5
1.0
1.5
OUTPUT CURRENT (A)
2.0
8050 G10
Operating conditions are per Table 1 and
Input Current vs Output Current
8V
OUT
12V
IN
24V
IN
36V
IN
48V
IN
Input Current vs Output Current
3.3V
OUT
12V
IN
24V
IN
36V
IN
48V
IN
INPUT CURRENT (A)
1.2
1.0
0.8
0.6
0.4
0.2
0
Input Current vs Output Current
5V
OUT
12V
IN
24V
IN
36V
IN
48V
IN
INPUT CURRENT (A)
0
0.5
1.0
1.5
OUTPUT CURRENT (A)
2.0
8050 G11
1.6
1.4
1.2
1.0
0.8
0.6
0.4
0.2
0
0
0.5
1.0
1.5
OUTPUT CURRENT (A)
2.0
8050 G12
1.2
1.0
INPUT CURRENT (A)
0.8
0.6
0.4
0.2
0
Input Current vs Output Current
12V
OUT
24V
IN
36V
IN
48V
IN
INPUT CURRENT (A)
1.2
1.0
0.8
0.6
0.4
0.2
0
Input Current vs Output Current
18V
OUT
36V
IN
48V
IN
1.4
1.2
INPUT CURRENT (A)
1.0
0.8
0.6
0.4
0.2
Input Current vs Output Current
24V
OUT
36V
IN
48V
IN
0
0.5
1.0
1.5
OUTPUT CURRENT (A)
2.0
8050 G13
0
0.5
1.0
OUTPUT CURRENT (A)
1.5
8050 G14
0
0
0.5
1.0
OUTPUT CURRENT (A)
1.5
8050 G15
Input Current vs V
IN
Output
Shorted
400
RT = 215k (200kHz)
RT = 93.1k (400kHz)
RT = 57.6k (600kHz)
RT = 33.2k (900kHz)
5
Output Current vs V
IN
Output
Shorted
16
BIAS Current vs Output Current
2.5V
OUT
BIAS = 5V
12V
IN
24V
IN
36V
IN
48V
IN
OUTPUT CURRENT (A)
INPUT CURRENT (mA)
3
200
BIAS CURRENT (mA)
RT = 215k (200kHz)
RT = 93.1k (400kHz)
RT = 57.6k (600kHz)
RT = 33.2k (900kHz)
0
20
40
60
INPUT VOLTAGE (V)
80
8050 G16
300
4
12
8
2
100
1
4
0
0
20
40
60
INPUT VOLTAGE (V)
80
8050 G16
0
0
0
0.5
1.0
1.5
OUTPUT CURRENT (A)
2.0
8050 G18
8050fc
For more information
www.linear.com/LTM8050
5
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