LTM8064
58V
IN
, 6A CVCC Step-Down
µModule Regulator
FEATURES
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DESCRIPTION
The
LTM
®
8064
is a 58V
IN
, 6A, constant-voltage, constant-
current (CVCC), step-down µModule
®
(power module)
regulator. Included in the package are the switching con-
troller, power switches, inductor and support components.
Operating over an input voltage range of 6V to 58V, the
LTM8064 supports an output voltage range of 1.2V to
36V. CVCC operation allows the LTM8064 to accurately
regulate its output current up to 7A when sourcing and
9.1A when sinking over the entire output range. The output
current can be set by a control voltage, a single resistor or
a thermistor. To set the switching frequency, simply place
a resistor from the RT pin to ground. A resistor from FB
to ground will set the output voltage. Only the bulk input
and output filter capacitors are needed to finish the design.
The LTM8064 is packaged in a thermally enhanced, com-
pact (16mm
×
11.9mm
×
4.92mm) over-molded ball grid
array (BGA) package suitable for automated assembly
by standard surface mount equipment. The LTM8064 is
RoHS compliant.
L,
LT, LTC, LTM, Linear Technology, the Linear logo and µModule are registered trademarks of
Linear Technology Corporation. All other trademarks are the property of their respective owners.
Protected by U.S. Patents, including 7199560, 7321203 and others pending.
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Complete Step-Down Switch Mode Power Supply
CVCC: Constant-Voltage, Constant-Current
2-Quadrant: Sources and Sinks Output Current
Parallelable for Increased Output Current,
Even from Different Voltage Sources
Adjustable Output Current Up to 7A When
Sourcing or 9.1A When Sinking
Wide Input Voltage Range: 6V to 58V
1.2V to 36V Output Voltage
Selectable Switching Frequency: 100kHz to 1MHz
(e1) RoHS Compliant Package
Programmable Soft-Start
Tiny (16mm
×
11.9mm
×
4.92mm) Surface Mount
BGA Package
APPLICATIONS
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Short- Circuit Protection or Accurate Output Current
Limit
High Power LED Drive
Peltier Driver
Motor Drive
Battery/Supercap Charging and Cell Balancing
TYPICAL APPLICATION
58V
IN
, 5V
OUT
Step-Down CVCC Converter
V
IN
7.5V TO 58V
Output Voltage vs Output Current
V
IN
= 12V
+
V
OUT
5V
330µF 6A
10V
OUTPUT VOLTAGE (V)
7
6
5
4
3
2
1
0
–10 –8
–6
–4 –2 0
2
4
OUTPUT CURRENT (A)
6
8
+
V
IN
15µF
100V
2×4.7µF
RUN
MODE
SYNC
RT
LTM8064
V
OUT
100µF
CTRL1
CTRL2
V
REF
GND
130k
325kHz
FB
5.11k
PINS NOT USED IN THIS CIRCUIT:
SS
I
OUTMON
PGOOD
8064 TA01a
8064 TA01b
For more information
www.linear.com/LTM8064
1
8064f
LTM8064
ABSOLUTE MAXIMUM RATINGS
(Note 1)
PIN CONFIGURATION
TOP VIEW
FB PGOOD RUN
1
2
3
4
5
6
GND
A
(BANK 2)
CTRL2 B
V
REF
CTRL1 C
SS D
I
OUTMON
E
RT
SYNC F
MODE
G
H
J
K
L
M
BGA PACKAGE
108-LEAD (16mm
×
11.9mm
×
4.92mm)
T
JMAX
= 125°C,
θ
JA
= 6.9°C/W,
θ
JCbottom
= 2.2°C/W,
θ
JCTOP
= 8.1°C/W,
θ
JB
= 6.0°C/W
WEIGHT = 2.44g,
θ
VALUES DETERMINED PER JEDEC JESD51-9, 51-12
BANK 3
V
OUT
7
8
9
V
IN
, RUN ...................................................................60V
FB, CTRL1, CTRL2, I
OUTMON
.......................................3V
V
OUT
..........................................................................40V
MODE, SYNC, PGOOD.................................................6V
Internal Operating Temperature Range .. –40°C to 125°C
Peak Solder Reflow Temperature .......................... 245°C
Storage Temperature.............................. –55°C to 125°C
BANK 1 V
IN
BANK 2
GND
ORDER INFORMATION
PART NUMBER
LTM8064EY#PBF
LTM8064IY#PBF
LTM8064IY
PAD OR BALL FINISH
SAC305 (RoHS)
SAC305 (RoHS)
SnPb (63/37)
PART MARKING*
DEVICE
LTM8064Y
LTM8064Y
LTM8064Y
FINISH CODE
e1
e1
e0
PACKAGE
TYPE
BGA
BGA
BGA
MSL
RATING
3
3
3
TEMPERATURE RANGE (NOTE 2)
–40°C to 125°C
–40°C to 125°C
–40°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.
• Pb-free and Non-Pb-free Part Markings:
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:
http://www.linear.com/packaging
2
8064f
For more information
www.linear.com/LTM8064
LTM8064
The
l
denotes the specifications which apply over the specified operating
internal temperature range, otherwise specifications are at T
A
= 25°C. RUN = 3V unless otherwise noted (Note 3).
PARAMETER
Minimum Input Voltage
Output DC Voltage
Output DC Sourcing Current
Quiescent Current Into V
IN
Line Regulation
Load Regulation
Output RMS Voltage Ripple
Switching Frequency
Voltage at FB Pin
Current Out of FB Pin
RUN Pin Current
RUN Threshold Voltage (Falling)
RUN Input Hysteresis
CTRL1 Control Range
CTRL1 Pin Current
CTRL1 Sourcing Current Limit
CTRL1 Sinking Current Limit
CTRL2 Control Range
CTRL2 Pin Current
CTRL2 Sourcing Current Limit
CTRL2 Sinking Current Limit
V
REF
Voltage
SS Pin Current
SYNC Input Low Threshold
SYNC Input High Threshold
SYNC Bias Current
MODE Low Threshold Voltage
MODE High Threshold Voltage
MODE Bias Current
MODE = 0V
3
50
f
SYNC
= 600kHz
f
SYNC
= 600kHz
SYNC = 0V
SYNC = 5V
2.3
1
1
2
CTRL2 = 1.5V
CTRL2 = 0.75V
CTRL2 = 1.5V
CTRL2 = 0.75V
0.5mA Load
6.3
2.85
8.2
4.5
1.89
11
1.4
CTRL1 = 1.5V
CTRL1 = 0.75V
CTRL1 = 1.5V
CTRL1 = 0.75V
6.3
2.85
8.2
4.5
0
100
7.0
3.55
9.1
5.75
7.7
4.25
10.0
6.9
2.06
0
20
7.0
3.55
9.1
5.75
7.7
4.25
10.0
6.9
1.5
FB = 0V, V
OUT
= 1V
RUN = 1.4V
1.46
CONDITIONS
V
IN
Falling
R
FB
Open
R
FB
= 562Ω
CTRL1, CTRL2 = 1.5V
V
IN
= 24V, RUN = 0V
V
IN
= 24V, No Load, MODE = 0V
6V < V
IN
< 58V, I
OUT
= 1A
V
IN
= 24V, 0A < I
OUT
< 6A
V
IN
= 24V, I
OUT
= 4.5A
R
T
= 40.2k
R
T
= 453k
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ELECTRICAL CHARACTERISTICS
MIN
TYP
1.2
36
MAX
6
UNITS
V
V
V
6
0.2
2.5
0.1
0.5
10
1000
100
1.176
1.20
61.75
5
1.52
185
1.5
1.58
1.224
6
5
A
µA
mA
%
%
mV
kHz
kHz
V
µA
µA
V
mV
V
nA
A
A
A
A
V
nA
A
A
A
A
V
µA
V
V
µA
µA
V
V
µA
For more information
www.linear.com/LTM8064
3
8064f
LTM8064
The
l
denotes the specifications which apply over the specified operating
internal temperature range, otherwise specifications are at T
A
= 25°C. RUN = 3V unless otherwise noted (Note 3).
PARAMETER
PGOOD Upper Threshold Voltage
PGOOD Upper Threshold Hysteresis
PGOOD Lower Threshold Voltage
PGOOD Lower Threshold Hysteresis
PGOOD Sink Current
PGOOD Leakage Current
I
OUTMON
Voltage
PGOOD = 2V
PGOOD = 6V
I
OUT
= 7.1A
I
OUT
= 3.55A
1.27
0.57
FB Falling
CONDITIONS
FB Rising
MIN
TYP
1.36
40
1.06
40
8
1
1.68
0.96
MAX
UNITS
V
mV
V
mV
mA
µA
V
V
ELECTRICAL CHARACTERISTICS
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:
This μModule regulator includes overtemperature protection that
is intended to protect the device during momentary overload conditions.
Internal temperature will exceed 125°C when overtemperature protection
is active. Continuous operation above the specified maximum internal
temperature may impair device reliability.
Note 3:
The LTM8064E is guaranteed to meet performance specifications
from 0°C to 125°C internal operating temperature. 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 LTM8064I is guaranteed to meet specifications over the full –40°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.
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8064f
For more information
www.linear.com/LTM8064
LTM8064
TYPICAL PERFORMANCE CHARACTERISTICS
Efficiency vs Output Current
V
OUT
= 1.8V
90
80
70
EFFICIENCY (%)
EFFICIENCY (%)
60
50
40
30
20
10
0
0
1
V
IN
= 12V
V
IN
= 24V
V
IN
= 36V
V
IN
= 48V
90
80
70
EFFICIENCY (%)
60
50
40
30
20
10
6
8064 G01
T
A
= 25°C, unless otherwise noted.
Efficiency vs Output Current
V
OUT
= 3.3V
100
90
80
70
60
50
40
30
20
10
6
8064 G02
Efficiency vs Output Current
V
OUT
= 2.5V
V
IN
= 12V
V
IN
= 24V
V
IN
= 36V
V
IN
= 48V
V
IN
= 12V
V
IN
= 24V
V
IN
= 36V
V
IN
= 48V
2
3
4
OUTPUT CURRENT (A)
5
0
0
1
2
3
4
OUTPUT CURRENT (A)
5
0
0
1
2
3
4
OUTPUT CURRENT (A)
5
6
8064 G03
Efficiency vs Output Current
V
OUT
= 5V
100
90
80
EFFICIENCY (%)
EFFICIENCY (%)
70
60
50
40
30
20
10
0
0
1
V
IN
= 12V
V
IN
= 24V
V
IN
= 36V
V
IN
= 48V
100
90
80
Efficiency vs Output Current
V
OUT
= 8V
100
90
80
EFFICIENCY (%)
70
60
50
40
30
20
10
6
8064 G05
Efficiency vs Output Current
V
OUT
= 12V
70
60
50
40
30
20
10
V
IN
= 12V
V
IN
= 24V
V
IN
= 36V
V
IN
= 48V
V
IN
= 24V
V
IN
= 36V
V
IN
= 48V
2
3
4
OUTPUT CURRENT (A)
5
6
8064 G04
0
0
1
2
3
4
OUTPUT CURRENT (A)
5
0
0
1
2
3
4
OUTPUT CURRENT (A)
5
6
8064 G06
100
90
80
EFFICIENCY (%)
Efficiency vs Output Current
V
OUT
= 18V
100
90
80
EFFICIENCY (%)
Efficiency vs Output Current
V
OUT
= 24V
Efficiency vs Output Current
V
OUT
= 36V
100
90
80
EFFICIENCY (%)
70
60
50
40
30
20
10
V
IN
= 48V
70
60
50
40
30
20
10
0
0
1
2
3
4
OUTPUT CURRENT (A)
5
6
8064 G07
70
60
50
40
30
20
10
0
0
1
2
3
4
OUTPUT CURRENT (A)
5
6
8064 G08
V
IN
= 24V
V
IN
= 36V
V
IN
= 48V
V
IN
= 36V
V
IN
= 48V
0
0
1
2
3
OUTPUT CURRENT (A)
4
8064 G09
For more information
www.linear.com/LTM8064
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8064f
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