FEATURES
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LTM8023
2A, 36V DC/DC
Step-Down µModule
Regulator
DESCRIPTION
The
LTM
®
8023
is a complete 2A, DC/DC step-down power
supply. 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
LTM8023 supports an output voltage range of 0.8V to 10V,
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 low profile package enables utilization of unused
space on the bottom of PC boards for high density point
of load regulation.
The LTM8023 is packaged in a thermally enhanced, com-
pact and low profile over-molded land grid array (LGA)
and ball grid array (BGA) packages suitable for automated
assembly by standard surface mount equipment. The
LTM8023 is available with SnPb (BGA) or RoHS compli-
ant terminal finish.
L,
LT, LTC, LTM, Linear Technology, the Linear logo, Burst Mode and µModule 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
2A Output Current
0.8V to 10V Output Voltage
Selectable Switching Frequency: 200kHz to 2.4MHz
Current Mode Control
Programmable Soft-Start
SnPb (BGA) or RoHS Compliant (LGA and BGA)
Finish
Tiny, Low Profile, Surface Mount LGA (9mm
×
11.25mm
×
2.82mm) and BGA (9mm
×
11.25mm
×
3.42mm) Packages
APPLICATIONS
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Automotive Battery Regulation
Power for Portable Products
Distributed Supply Regulation
Industrial Supplies
Wall Transformer Regulation
TYPICAL APPLICATION
5.5V
IN
to 36V
IN
, 3.3V/2A DC/DC µModule
®
Converter
90
Efficiency and Power Loss
1.8
1.6
1.4
1.2
1.0
0.8
0.6
0.4
V
IN
= 12V
V
OUT
= 3.3V
f = 650 kHz
0.01
0.1
1
LOAD CURRENT (A)
10
8023 TA01b
V
IN
*
5.5V TO 36V
2.2µF
V
IN
RUN/SS
V
OUT
AUX
BIAS
SHARE
LTM8023
PGOOD
ADJ
22µF
V
OUT
3.3V
2A
EFFICIENCY (%)
85
80
75
70
65
60
55
POWER LOSS (W)
SELECTABLE
OPERATING
FREQUENCY
49.9k
R
T
GND SYNC
8023 TA01
0.2
0
154k
50
*RUNNING VOLTAGE RANGE. PLEASE
REFER TO APPLICATIONS INFORMATION
FOR START-UP DETAILS
For more information
www.linear.com/LTM8023
1
8023fj
LTM8023
ABSOLUTE MAXIMUM RATINGS
(Note 1)
V
IN
, RUN/SS Voltage .................................................40V
ADJ, R
T
, SHARE Voltage .............................................5V
V
OUT
, AUX .................................................................10V
PGOOD, SYNC...........................................................30V
BIAS ..........................................................................16V
V
IN
+ BIAS .................................................................56V
Internal Operating Temperature
(Note 2).................................................. –40°C to 125°C
Storage Temperature.............................. –55°C to 125°C
Solder Temperature............................................... 250°C
PIN CONFIGURATION
GND (BANK 3)
7
6
5
4
3
V
OUT
(BANK 2) 2
1
A
B
C
D
E
F
G
H
SYNC
PGOOD
RUN/SS
BIAS
AUX
SHARE R
T
ADJ
7
6
5
4
3
V
OUT
(BANK 2) 2
1
A
B
C
D
E
F
G
H
SYNC
PGOOD
RUN/SS
BIAS
AUX
GND (BANK 3)
SHARE R
T
ADJ
V
IN
(BANK 1)
V
IN
(BANK 1)
LGA PACKAGE
50-LEAD (11.25mm
×
9mm
×
2.82mm)
T
JMAX
= 125°C,
θ
JA
= 30.4°C/W,
θ
JCbottom
= 12.2°C/W,
θ
JCtop
= 23.9°C/W,
θ
JB
= 12.1°C/W, WEIGHT = 0.9g
θ
VALUES DETERMINED PER JEDEC 51-9, 51-12
BGA PACKAGE
50-LEAD (11.25mm
×
9mm
×
3.42mm)
T
JMAX
= 125°C,
θ
JA
= 32.1°C/W,
θ
JCbottom
= 14.8°C/W,
θ
JCtop
= 23.7°C/W,
θ
JB
= 14.6°C/W, WEIGHT = 0.9g
θ
VALUES DETERMINED PER JEDEC 51-9, 51-12
ORDER INFORMATION
PART NUMBER
LTM8023EV#PBF
LTM8023IV#PBF
LTM8023MPV#PBF
LTM8023EY#PBF
LTM8023IY#PBF
LTM8023IY
LTM8023MPY#PBF
LTM8023MPY
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
LTM8023V
LTM8023V
LTM8023MPV
LTM8023Y
LTM8023Y
LTM8023Y
LTM8023Y
LTM8023Y
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 85°C
–40°C to 85°C
–55°C to 125°C
–40°C to 85°C
–40°C to 85°C
–40°C to 85°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
8023fj
2
For more information
www.linear.com/LTM8023
LTM8023
ELECTRICAL CHARACTERISTICS
SYMBOL
V
IN
V
OUT
R
ADJ(MIN)
I
OUT
IQ
VIN
PARAMETER
Input DC Voltage
Output DC Voltage
Minimum Allowable R
ADJ
Continuous Output DC Current
V
IN
Quiescent Current
0A < I
OUT
≤ 2A, R
ADJ
Open, C
OUT
= 51µF (Note 3)
0A < I
OUT
≤ 2A, R
ADJ
= 43.2k, C
OUT
= 51µF (Note 3)
(Note 4)
4 ≤ V
IN
≤ 36, C
OUT
= 51µF
V
RUN/SS
= 0.2V, R
T
= 174k
V
BIAS
= 3V, Not Switching, R
T
= 174k (E, I)
V
BIAS
= 3V, Not Switching, R
T
= 174k (MP)
V
BIAS
= 0V, Not Switching, R
T
= 174k
V
RUN/SS
= 0.2V, R
T
= 174k
V
BIAS
= 3V, Not Switching, R
T
= 174k (E, I)
V
BIAS
= 3V, Not Switching, R
T
= 174k (MP)
V
BIAS
= 0V, Not Switching, R
T
= 174k
5 ≤ V
IN
≤ 36, I
OUT
= 1A, V
OUT
= 3.3V, C
OUT
= 51µF
V
IN
= 24V, 0 ≤ I
OUT
≤ 2A, V
OUT
= 3.3V, C
OUT
= 51µF
V
IN
= 24V, I
OUT
= 2A, V
OUT
= 3.3V, C
OUT
= 51µF
R
T
= 113k, C
OUT
= 51µF
V
IN
= 36V, V
OUT
= 0V (Note 5)
C
OUT
= 51µF
l
l
l
The
l
denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at T
A
= 25°C. V
IN
= 10V, V
RUN/SS
= 10V, V
BIAS
= 3V, R
T
= 60.4k, C
OUT
= 4.7µF unless
otherwise specified.
CONDITIONS
l
MIN
3.6
TYP
0.8
10
MAX
36
UNITS
V
V
V
kΩ
42.2
0
0.1
25
25
85
0.03
50
50
1
0.1
0.4
10
325
2.9
765
790
2.3
805
2.8
2
0.5
60
350
120
0.5
120
200
5
A
µA
µA
µA
µA
µA
µA
µA
µA
%
%
mV
kHz
A
mV
V
µA
IQ
BIAS
BIAS Quiescent Current
l
l
ΔV
OUT
/V
OUT
ΔV
OUT
/V
OUT
f
SW
I
SC(OUT)
V
ADJ
V
BIAS(MIN)
I
ADJ
I
RUN/SS
V
IH(RUN/SS)
V
IL(RUN/SS)
V
PGOOD(TH)
I
PGOOD(O)
I
PGOOD(SINK)
V
SYNCIL
V
SYNCIH
I
SYNCBIAS
Line Regulation
Load Regulation
Switching Frequency
Output Short Circuit Current
Voltage at ADJ Pin
Minimum BIAS Voltage for Proper
Operation
Current Out of ADJ Pin
RUN/SS Pin Current
RUN/SS Input High Voltage
RUN/SS Input Low Voltage
PGOOD Threshold
PGOOD Leakage
PGOOD Sink Current
SYNC Input Low Threshold
SYNC Input High Threshold
SYNC Pin Bias Current
V
OUT(AC_RMS)
Output Ripple (RMS)
ADJ = 1V, C
OUT
= 51µF
V
RUN/SS
= 2.5V
C
OUT
= 51µF
C
OUT
= 51µF
V
OUT
Rising
V
PGOOD
= 30V
V
PGOOD
= 0.4V
f
SYNC
= 550kHz, C
OUT
= 51µF
f
SYNC
= 550kHz, C
OUT
= 51µF
V
SYNC
= 0V
0.7
200
2.5
2
5
10
0.2
730
0.1
800
0.5
0.1
1
µA
V
V
mV
µA
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:
The LTM8023E is guaranteed to meet performance specifications
from 0°C to 85°C ambient. Specifications over the full –40°C to
85°C ambient operating temperature range are assured by design,
characterization and correlation with statistical process controls. The
LTM8023I is guaranteed to meet specifications over the full –40°C to 85°C
ambient operating temperature range. The LTM8023MP is guaranteed to
meet specifications over the full –55°C to 125°C 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:
C
OUT
= 51µF is composed of a 4.7µF ceramic capacitor in parallel
with a 47µF electrolytic.
Note 4:
Guaranteed by design.
Note 5:
Short circuit current at V
IN
= 36V is guaranteed by characterization
and correlation. 100% tested at V
IN
= 10V
For more information
www.linear.com/LTM8023
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LTM8023
TYPICAL PERFORMANCE CHARACTERISTICS
100
90
80
EFFICIENCY (%)
EFFICIENCY (%)
70
60
50
40
30
20
0.01
0.1
OUTPUT CURRENT (A)
12V
IN
24V
IN
36V
IN
1
8023 G01
T
A
= 25°C unless otherwise noted
Efficiency (8V
OUT
)
V
OUT
= 8V
90
85
80
75
70
65
60
55
Efficiency (5V
OUT
)
V
OUT
= 5V
90
85
80
EFFICIENCY (%)
75
70
65
60
12V
IN
24V
IN
36V
IN
55
Efficiency (3.3V
OUT
)
V
OUT
= 3.3V
50
0.01
0.1
OUTPUT CURRENT (A)
1
8023 G02
50
0.01
5V
IN
12V
IN
24V
IN
36V
IN
0.1
OUTPUT CURRENT (A)
1
8023 G03
Minimum Required Input Voltage
vs Output Voltage
20
18
16
INPUT VOLTAGE (V)
14
12
10
8
6
4
2
0
2
4
6
OUTPUT VOLTAGE (V)
8
10
8023 G04
36V
IN
Start-Up Waveforms
(5V
OUT
)
V
OUT
2V/DIV
I
IN
0.2A/DIV
RUN/SS
5V/DIV
V
IN
= 36V
I
OUT
= 2A
V
BIAS
= 3V
50µs/DIV
8023 G05
36V
IN
Start-Up Waveforms
(3.3V
OUT
)
V
OUT
2V/DIV
I
IN
0.2A/DIV
RUN/SS
5V/DIV
V
IN
= 36V
I
OUT
= 2A
V
BIAS
= 3V
50µs/DIV
8023 G06
I
OUT
= 2A
OPERATING FREQUENCY
AS RECOMMENDED
IN TABLE 1
Input Current vs Output Current
1600
1400
INPUT CURRENT (mA)
1200
1000
800
600
400
200
0
0
500
1000
1500
OUTPUT CURRENT (mA)
12V
IN
24V
IN
36V
IN
2000
8023 G07
Input Current vs Output Current
1200
1000
INPUT CURRENT (mA)
INPUT CURRENT (mA)
800
600
400
200
0
12V
IN
24V
IN
36V
IN
V
OUT
= 5V
2000
1800
1600
1400
1200
1000
800
600
400
200
0
500
1000
1500
OUTPUT CURRENT (mA)
2000
8023 G08
Input Current vs Output Current
V
OUT
= 3.3V
V
OUT
= 8V
5V
IN
12V
IN
24V
IN
36V
IN
0
0
500
1000
1500
OUTPUT CURRENT (mA)
2000
8023 G09
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8023fj
For more information
www.linear.com/LTM8023
LTM8023
TYPICAL PERFORMANCE CHARACTERISTICS
Output Short-Circuit Current
vs Input Voltage
3200
3000
OUTPUT CURRENT (mA)
BIAS CURRENT (mA)
2800
2600
2400
2200
2000
1800
1600
0
10
20
30
INPUT VOLTAGE (V)
40
8023 G10
T
A
= 25°C unless otherwise noted
Maximum Load Current
vs Input Voltage (8V
OUT
, LGA)
BIAS Current vs Load Current
30
25
20
15
10
5
0
3.3V
OUT
5V
OUT
8V
OUT
LOAD CURRENT (mA)
2500
2000
1500
1000
500
0
500
1000
1500
LOAD CURRENT (mA)
2000
8023 G11
0
25°C
40°C
85°C
0
10
20
30
INPUT VOLTAGE (V)
40
8023 G13
2500
Load Current
vs Input Voltage (5V
OUT
, LGA)
2500
Load Current
vs Input Voltage (3.3V
OUT
, LGA)
2000
LOAD CURRENT (mA)
LOAD CURRENT (mA)
25°C
40°C
85°C
0
10
20
30
INPUT VOLTAGE (V)
40
8023 G14
2000
1500
1500
1000
1000
500
500
0
0
25°C
40°C
85°C
0
10
20
30
INPUT VOLTAGE (V)
40
8023 G15
3.3V
OUT
Junction Temperature
vs Load (LGA)
50
45
40
TEMPERATURE RISE (°C)
35
30
25
20
15
10
5
0
0
500
1000
1500
CURRENT (mA)
2000
12V
IN
24V
IN
36V
IN
2500
8023 G16
5V
OUT
Junction Temperature
vs Load (LGA)
60
50
TEMPERATURE RISE (°C)
40
30
20
10
0
12V
IN
24V
IN
36V
IN
0
500
1000
1500
CURRENT (mA)
2000
2500
8023 G17
8V
OUT
Junction Temperature
vs Load (LGA)
80
70
TEMPERATURE RISE (°C)
60
50
40
30
20
10
0
0
500
1000
1500
CURRENT (mA)
2000
16V
IN
24V
IN
36V
IN
2500
8023 G18
For more information
www.linear.com/LTM8023
5
8023fj
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