FEATURES
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LTM8052/LTM8052A
36V
IN
, 5A, 2-Quadrant
CVCC Step-Down
µModule Regulator
DESCRIPTION
The
LTM
®
8052/LTM8052A
is a 36V
IN
, 5A, 2-quadrant
constant-voltage, constant-current (CVCC) step-down
μModule
®
regulator. Included in the package are the
switching controller, power switches, inductor and support
components. Operating over an input voltage range of 6V to
36V, the LTM8052/LTM8052A supports an output voltage
range of 1.2V to 24V. The LTM8052/LTM8052A is able to
sink or source current to maintain voltage regulation up to
the positive and negative current limits. This output current
limit can be set by a control voltage, a single resistor or a
thermistor. LTM8052 features a 125% output overvoltage
protection, while LTM8052A does not, allowing operation
when the output is above the target regulation point.
The LTM8052/LTM8052A is packaged in a compact
(11.25mm × 15mm × 2.82mm) overmolded land grid ar-
ray (LGA) and ball grid array (BGA) package suitable for
automated assembly by standard surface mount equip-
ment. The LTM8052/LTM8052A are available with SnPb
(BGA) or RoHS compliant terminal finish.
PART NUMBER
LTM8052
LTM8052A
LTM8026
BEST FOR
Sinking and sourcing output current for voltage
regulation primarily.
Sinking and sourcing output current for current
regulation primarily.
Sourcing more than 3A of output current.
(Less than 3A maximum consider LTM8025.)
Complete Step-Down Switch Mode Power Supply
CVCC: Constant-Voltage Constant-Current
2-Quadrant: Sources and Sinks Output Current
Adjustable Output Current
Wide Input Voltage Range: 6V to 36V
1.2V to 24V Output Voltage
Forced Continuous Operation
Selectable Switching Frequency: 100kHz to 1MHz
(e4) RoHS Compliant Package with Gold Pad Finish
Programmable Soft-Start
Compact (11.25mm × 15mm × 2.82mm) Surface
Mount LGA and (11.25mm × 15mm × 3.42mm)
BGA Packages
APPLICATIONS
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Constant-Frequency Voltage Regulation Even at
No Load
Peltier Driver
Battery Tester
Battery/Supercap Charging and Cell Balancing
Motor Drive Power Regulator
High Power LED Drive
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.
Click to view associated TechClip Videos.
TYPICAL APPLICATION
±5A, 2.5V (2-Quadrant) µModule Voltage Regulator
V
IN
*
6V TO 36V
LTM8052
V
IN
V
OUT
RUN
SS
OPTIONAL
INPUT
PROTECTION
SYNC
COMP
RT
V
REF
CTL_I
CTL_T
GND ADJ
9.09k
100µF
V
OUT
2.5V
±5A
3.5
3.0
OUTPUT VOLTAGE (V)
2.5
2.0
1.5
1.0
0.5
Output Voltage vs Output Current
LTM8052A MAINTAINS CURRENT
REGULATION
LTM8052 TURNS OFF AT
OUTPUT OVERVOLTAGE
10µF
510k
+
330µF
90.9k
*INPUT VOLTAGE PROTECTION MAY BE NECESSARY WHEN THE
LTM8052 IS SINKING CURRENT (SEE APPLICATIONS INFORMATION)
8052 TA01a
0
–10
–5
0
LOAD CURRENT (A)
5
10
8052 TA01b
8052fg
For more information
www.linear.com/LTM8052
1
LTM8052/LTM8052A
ABSOLUTE MAXIMUM RATINGS
(Note 1)
V
IN
............................................................................40V
ADJ, RT, COMP, CTL_I, CTL_T, V
REF
...........................3V
V
OUT
..........................................................................25V
RUN, SYNC, SS ...........................................................6V
Current Into RUN Pin ............................................100µA
Internal Operating Temperature Range .. –40°C to 125°C
Peak Solder Reflow Body Temperature ................. 245°C
Storage Temperature.............................. –55°C to 125°C
PIN CONFIGURATION
TOP VIEW
CTL_T
CTL_T
COMP
CTL_I
V
REF
ADJ
SS
RT
TOP VIEW
COMP
CTL_I
V
REF
ADJ
SS
RT
8
7
6
5
4
3
2
1
A
B
C
D
E
F
G
H
J
BANK 1
V
OUT
BANK 3
V
IN
K
L
BANK 2 GND
SYNC
RUN
8
7
6
5
4
3
2
1
A
B
C
D
E
F
G
H
J
BANK 1
V
OUT
BANK 3
V
IN
K
L
BANK 2 GND
SYNC
RUN
LGA PACKAGE
81-LEAD (15mm
×
11.25mm
×
2.82mm)
T
JMAX
= 125°C,
θ
JA
= 18.6°C/W,
θ
JC(bottom)
= 5.4°C/W,
θ
JB
= 5.6°C/W,
θ
JC(top)
= 10.8°C/W
PCB WEIGHT = 1.4 GRAMS,
θ
VALUES DERIVED FROM A 4-LAYER 7.62cm
×
7.62cm
BGA PACKAGE
81-LEAD (15mm
×
11.25mm
×
3.42mm)
T
JMAX
= 125°C,
θ
JA
= 18.6°C/W,
θ
JC(bottom)
= 5.4°C/W,
θ
JB
= 5.6°C/W,
θ
JC(top)
= 10.8°C/W
PCB WEIGHT = 1.4 GRAMS,
θ
VALUES DERIVED FROM A 4-LAYER 7.62cm
×
7.62cm
2
8052fg
For more information
www.linear.com/LTM8052
LTM8052/LTM8052A
ORDER INFORMATION
PART NUMBER
LTM8052EV#PBF
LTM8052IV#PBF
LTM8052MPV#PBF
LTM8052AEV#PBF
LTM8052AIV#PBF
LTM8052AMPV#PBF
LTM8052EY#PBF
LTM8052IY#PBF
LTM8052MPY#PBF
LTM8052AEY#PBF
LTM8052AIY#PBF
LTM8052AMPY#PBF
LTM8052IY
LTM8052MPY
LTM8052AIY
LTM8052AMPY
PAD OR BALL FINISH
Au (RoHS)
Au (RoHS)
Au (RoHS)
Au (RoHS)
Au (RoHS)
Au (RoHS)
SAC305 (RoHS)
SAC305 (RoHS)
SAC305 (RoHS)
SAC305 (RoHS)
SAC305 (RoHS)
SAC305 (RoHS)
SnPb (63/67)
SnPb (63/67)
SnPb (63/67)
SnPb (63/67)
http://www.linear.com/product/LTM8052#orderinfo
PART MARKING*
DEVICE
LTM8052V
LTM8052V
LTM8052V
LTM8052AV
LTM8052AV
LTM8052AV
LTM8052Y
LTM8052Y
LTM8052Y
LTM8052AY
LTM8052AY
LTM8052AY
LTM8052Y
LTM8052Y
LTM8052AY
LTM8052AY
FINISH CODE
e4
e4
e4
e4
e4
e4
e1
e1
e1
e1
e1
e1
e0
e0
e0
e0
PACKAGE
TYPE
LGA
LGA
LGA
LGA
LGA
LGA
BGA
BGA
BGA
BGA
BGA
BGA
BGA
BGA
BGA
BGA
MSL
RATING
3
3
3
3
3
3
3
3
3
3
3
3
3
3
3
3
TEMPERATURE RANGE
(SEE NOTE 3)
–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
–55°C to 125°C
–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
–55°C to 125°C
–40°C to 125°C
–55°C to 125°C
–40°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
8052fg
For more information
www.linear.com/LTM8052
3
LTM8052/LTM8052A
ELECTRICAL CHARACTERISTICS
PARAMETER
Minimum Input Voltage
Output DC Voltage
Output DC Current
Quiescent Current Into V
IN
Line Regulation
Load Regulation
Output RMS Voltage Ripple
Switching Frequency
Voltage at ADJ Pin
Current Out of ADJ Pin
RUN Pin Current
RUN Threshold Voltage (Falling)
RUN Input Hysteresis
CTL_I Control Range
CTL_I Pin Current
CTL_I Positive Current Limit
CTL_I Negative Current Limit
CTL_T Control Range
CTL_T Pin Current
CTL_T Positive Current Limit
CTL_T Negative Current Limit
V
REF
Voltage
SS Pin Current
SYNC Input Low Threshold
SYNC Input High Threshold
SYNC Bias Current
The
l
denotes the specifications which apply over the full internal
operating temperature range, otherwise specifications are at T
A
= 25°C. RUN = 3V, unless otherwise noted. (Note 3)
CONDITIONS
l
MIN
TYP
1.2
24
MAX
6
I
OUT
= 1A, R
ADJ
Open
I
OUT
= 1A, R
ADJ
= 499Ω
CTL_T, CTL_I = 1.5V
V
IN
= 12V, RUN = 0V
V
IN
= 12V, No Load
6V < V
IN
< 36V, I
OUT
= 1A
V
IN
= 12V, 0A < I
OUT
< 5A
V
IN
= 12V, I
OUT
= 4.5A
R
T
= 40.2k
R
T
= 453k
l
–6
0.1
17
0.1
0.7
10
1000
100
1.19
100
5.5
1.55
160
5
3
30
1.16
1.22
ADJ = 0V, V
OUT
= 1V
RUN = 1.45V
1.49
0
CTL_I = 1.5V
CTL_I = 0.75V
CTL_I = 1.5V
CTL_I = 0.75V
5.1
2.24
–8.5
–5.7
0
5.1
2.24
–8.5
–5.5
1.93
1.61
1.5
1.5
6.1
3.36
–6.9
–4.5
1.5
1.5
6.1
3.36
–6.9
–4.3
2.04
0.6
5.6
2.8
–7.7
–5.1
CTL_T = 1.5V
CTL_T = 0.75V
CTL_T = 1.5V
CTL_T = 0.75V
0.5mA Load
f
SYNC
= 400kHz
f
SYNC
= 400kHz
SYNC = 0V
5.6
2.8
–7.7
–4.9
2
11
1.2
1
UNITS
V
V
V
A
µA
mA
%
%
mV
kHz
kHz
V
µA
µA
V
mV
V
µA
A
A
A
A
V
µA
A
A
A
A
V
µA
V
V
µA
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
operating junction temperature may impair device reliability.
Note 3:
The LTM8052E/LTM8052AE 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 LTM8052I/LTM8052AI is guaranteed
to meet specifications over the full –40°C to 125°C internal operating
temperature range. The LTM8052MP/LTM8052AMP 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.
4
8052fg
For more information
www.linear.com/LTM8052
LTM8052/LTM8052A
TYPICAL PERFORMANCE CHARACTERISTICS
1.2V
OUT
Efficiency
90
85
80
EFFICIENCY (%)
EFFICIENCY (%)
75
70
65
60
55
50
0
1
4
3
OUTPUT CURRENT (A)
2
6V
IN
12V
IN
24V
IN
36V
IN
5
8052 G01
T
A
= 25°C, unless otherwise noted.
1.5V
OUT
Efficiency
90
85
80
75
70
65
60
55
50
0
1
4
3
OUTPUT CURRENT (A)
2
6V
IN
12V
IN
24V
IN
36V
IN
5
8052 G02
1.8V
OUT
Efficiency
95
90
85
EFFICIENCY (%)
80
75
70
65
60
55
50
0
1
2
4
3
OUTPUT CURRENT (A)
6V
IN
12V
IN
24V
IN
36V
IN
5
8052 G03
2.5V
OUT
Efficiency
95
90
85
EFFICIENCY (%)
EFFICIENCY (%)
80
75
70
65
60
55
50
0
1
4
3
OUTPUT CURRENT (A)
2
6V
IN
12V
IN
24V
IN
36V
IN
5
8052 G04
3.3V
OUT
Efficiency
95
90
85
EFFICIENCY (%)
6V
IN
12V
IN
24V
IN
36V
IN
0
1
4
3
OUTPUT CURRENT (A)
2
5
8052 G05
5V
OUT
Efficiency
100
95
90
85
80
75
70
65
60
55
50
0
1
4
3
OUTPUT CURRENT (A)
2
8V
IN
12V
IN
24V
IN
36V
IN
5
8052 G06
80
75
70
65
60
55
50
8V
OUT
Efficiency
100
95
90
EFFICIENCY (%)
EFFICIENCY (%)
85
80
75
70
65
60
55
50
0
1
4
3
OUTPUT CURRENT (A)
2
10V
IN
12V
IN
24V
IN
36V
IN
5
8052 G07
12V
OUT
Efficiency
100
95
90
EFFICIENCY (%)
15V
IN
24V
IN
36V
IN
0
1
4
3
OUTPUT CURRENT (A)
2
5
8052 G08
18V
OUT
Efficiency
100
95
90
85
80
75
70
65
60
55
50
0
1
4
3
OUTPUT CURRENT (A)
2
22V
IN
24V
IN
36V
IN
5
8052 G09
85
80
75
70
65
60
55
50
8052fg
For more information
www.linear.com/LTM8052
5
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