LTM8031_15 Datasheet, PDF (1/22 Pages) Linear Technology – Ultralow Noise EMC 36V, 1A DC/DC Module Regulator

Features
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
Applications
n _{Automotive Battery Regulation}
n _{Power for Portable Products}
n _{Distributed Supply Regulation}
n _{Industrial Supplies}
n _{Wall Transformer Regulation}
LTM8031
Ultralow Noise EMC 36V, 1A
DC/DC µModule Regulator
Description
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.
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.
Typical Application
Ultralow Noise 5V/1A DC/DC µModule Regulator
V_IN*
7VDC TO 36VDC
V_IN
OUT
FIN _LTM8031
RUN/SS
AUX
1µF
BIAS
SHARE
PGOOD
RT SYNC GND ADJ
44.2k
47.5k
8031 TA01a
10µF
V_OUT
5V
1A
*RUNNING VOLTAGE RANGE.
SEE APPLICATIONS FOR START-UP DETAILS
LTM8031 EMI Performance
V_IN = 36V
80
70
60
50
40
EN55022
CLASS B
30
LIMIT
20
10
0
–10
0 100 200 300 400 500 600 700 800 900 1000
FREQUENCY (MHz)
8031 TA01b
8031fb
1