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LTM8031EV#PBF

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LTM8031
1
8031fb
Typical applicaTion
DescripTion
Ultralow Noise EMC 36V, 1A
DC/DC µModule Regulator
The LTM
®
8031 is an electromagnetic compatible (EMC)
36V, 1A 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 LTM8031 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 (2.82mm)
enables utilization of unused space on the bottom of PC
boards for high density point of load regulation.
The LTM8031 is packaged in a thermally enhanced, compact
(9mm ×15mm) and low profile (2.82mm) overmolded land
grid array (LGA) package suitable for automated assembly
by standard surface mount equipment. The LTM8031 is
RoHS compliant.
Ultralow Noise 5V/1A DC/DC µModule Regulator
FeaTures
applicaTions
n
Complete Step-Down Switch Mode Power Supply
n
Wide Input Voltage Range: 3.6V to 36V
n
1A Output Current
n
0.8V to 10V Output Voltage
n
Switching Frequency from 200kHz to 2.4MHz
n
EN55022 Class B Compliant with Margin
n
Current Mode Control
n
(e4) RoHS Compliant Package with Gold Pad Finish
n
Programmable Soft-Start
n
Pin Compatible with the LTM8032
n
Low Profile (9mm × 15mm × 2.82mm)
Surface Mount LGA Package
n
Automotive Battery Regulation
n
Power for Portable Products
n
Distributed Supply Regulation
n
Industrial Supplies
n
Wall Transformer Regulation
LTM8031 EMI Performance
L, LT, LTC, LTM, µModule, Burst Mode, Linear Technology and the Linear logo are registered
trademarks of Linear Technology Corporation. All other trademarks are the property of their
respective owners.
RT
SHARE
47.5k44.2k
*RUNNING VOLTAGE RANGE.
SEE APPLICATIONS FOR START-UP DETAILS
V
IN
FIN
1µF
10µF
V
OUT
5V
1A
RUN/SS
V
IN
*
7VDC TO 36VDC
PGOOD
BIAS
LTM8031
AUX
OUT
SYNC GND
8031 TA01a
ADJ
FREQUENCY (MHz)
0
EMISSIONS LEVEL (dBµV/m)
50
70
800
8031 TA01b
30
EN55022
CLASS B
LIMIT
10
40
60
80
20
0
–10
200100
400300
600 700 900
500
1000
V
IN
= 36V
LTM8031
2
8031fb
V
IN
, FIN, RUN/SS Voltage ..........................................40V
ADJ, RT, SHARE Voltage .............................................5V
V
OUT
, AUX .................................................................10V
Current from AUX ................................................100mA
PGOOD, SYNC ..........................................................30V
BIAS .......................................................................... 25V
V
IN
+ BIAS ................................................................. 56V
Maximum Junction Temperature (Note 2)............. 125°C
Solder Temperature (Note 3) ................................. 245°C
(Note 1)
GND
1
A
B
C
BANK 1
BANK 2
BANK 3
D
E
F
G
H
J
K
L
2 3 4
TOP VIEW
LGA PACKAGE
71-LEAD (9mm × 15mm × 2.82mm)
5 6 7
V
OUT
V
IN
RT
SHARE
ADJ
PGOOD
SYNCRUN/SS
FIN
BIAS
AUX
T
JMAX
= 125°C, θ
JA
= 20.7°C/W, θ
JC(BOTTOM)
= 8.4°C/W,
θ
JC(TOP)
= 25.6°C/W, θ
JBOARD
= 13.8°C/W
θ
VALUES DETERMINED PER JESD 51-9
WEIGHT = 1.2g
pin conFiguraTionabsoluTe MaxiMuM raTings
LEAD FREE FINISH TRAY PART MARKING* PACKAGE DESCRIPTION TEMPERATURE RANGE
LTM8031EV#PBF LTM8031EV#PBF LTM8031V
71-Lead (9mm × 15mm × 2.82mm) LGA
–40°C to 125°C
LTM8031IV#PBF LTM8031IV#PBF LTM8031V
71-Lead (9mm × 15mm × 2.82mm) LGA
–40°C to 125°C
LTM8031MPV#PBF LTM8031MPV#PBF LTM8031V
71-Lead (9mm × 15mm × 2.82mm) LGA
–55°C to 125°C
Consult LTC Marketing for parts specified with wider operating temperature ranges. *The temperature grade is identified by a label on the shipping container.
For more information on lead free part marking, go to: http://www.linear.com/leadfree/
This product is only offered in trays. For more information go to: http://www.linear.com/packaging/
orDer inForMaTion
LTM8031
3
8031fb
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: The LTM8031E is guaranteed to meet performance specifications
from 0°C to 125°C internal. Specifications over the –40°C to 125°C
internal temperature range are assured by design, characterization and
correlation with statistical process controls. The LTM8031I is guaranteed
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, unless otherwise specified.
SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
V
IN
Input DC Voltage
l
3.6 36 V
V
OUT
Output DC Voltage 0.2A < I
OUT
≤ 1A, R
ADJ
Open
0.2A < I
OUT
≤ 1A, R
ADJ
= 21.6k
0.8
10
V
V
I
OUT
Continuous Output DC Current V
IN
= 24V 1 A
I
Q(VIN)
V
IN
Quiescent Current V
RUN/SS
= 0.2V
V
BIAS
= 3V, Not Switching
V
BIAS
= 0V, Not Switching
l
0.6
25
88
60
120
µA
µA
µA
I
Q(BIAS)
BIAS Quiescent Current V
RUN/SS
= 0.2V
V
BIAS
= 3V, Not Switching
V
BIAS
= 0V, Not Switching
l
0.03
60
1
120
5
µA
µA
µA
∆V
OUT
V
OUT
Line Regulation 10V ≤ V
IN
≤ 36V, I
OUT
= 1A, V
OUT
= 3.3V 0.1 %
Load Regulation V
IN
= 24V, 0.2A ≤ I
OUT
≤ 1A, V
OUT
= 3.3V 0.3 %
V
OUT(AC_RMS)
Output Ripple (RMS) V
IN
= 24V, I
OUT
= 1A, V
OUT
= 3.3V 6 mV
f
SW
Switching Frequency R
T
= 113k 325 kHz
V
ADJ
Voltage at ADJ Pin
l
765 790 815 mV
V
BIAS(MIN)
Minimum BIAS Voltage for Proper Operation 1.9 2.8 V
I
ADJ
Current Out of ADJ Pin V
RUN/SS
= 0V, V
ADJ
= 0V, V
OUT
= 1V 4 µA
I
RUN/SS
RUN/SS Pin Current V
RUN/SS
= 2.5V 5 10 µA
V
IH(RUN/SS)
RUN/SS Input High Voltage 2.5 V
V
IL(RUN/SS)
RUN/SS Input Low Voltage 0.2 V
V
PG(TH)
ADJ Voltage Threshold for PGOOD to Switch 730 mV
I
PGO
PGOOD Leakage V
PG
= 30V 0.1 1 µA
I
PGSINK
PGOOD Sink Current V
PG
= 0.4V 200 800 µA
V
SYNCIL
SYNC Input Low Threshold f
SYNC
= 550kHz 0.5 V
V
SYNCIH
SYNC Input High Threshold f
SYNC
= 550kHz 0.7 V
I
SYNC(BIAS)
SYNC Pin Bias Current V
SYNC
= 0V, V
BIAS
= 0V 0.1 µA
V
IN(RIPPLE)
550kHz Narrowband Conducted Emission
1MHz Narrowband Conducted Emission
3MHz Narrowband Conducted Emission
V
IN
= 24V, V
OUT
= 3.3V, I
OUT
= 1A, f
SW
= 550kHz,
5µH LISN
83
63
51
dBµV
dBµV
dBµV
to meet specifications over the full –40°C to 125°C internal operating
temperature range. The LTM8031MP 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: See Linear Technology Application Note 100.
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LTM8031EV#PBF

Mfr. #:
Buy LTM8031EV#PBF
Manufacturer:
Analog Devices / Linear Technology
Description:
Switching Voltage Regulators Ultralow EMI, 36V, 1A Step-down Module Regulator
Lifecycle:
New from this manufacturer.
Delivery:
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