LTM8027
60V, 4A DC/DC
µModule Regulator
FeaTures
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DescripTion
The LTM
®
8027 is a complete 4A, DC/DC step-down power
supply. Included in the package are the switching control-
ler, power switches, inductor and all support components.
Operating over an input voltage range of 4.5V to 60V (7.5V
minimum voltage to start), the LTM8027 supports output
voltages up to 24V, and a switching frequency range of
100kHz to 500kHz, each set by a single resistor. Only the
bulk input and output filter capacitors are needed to finish
the design.
The low profile package (4.32mm) enables utilization of
unused space on the bottom of PC boards for high den-
sity point of load regulation. A built-in soft-start timer is
adjustable with a small capacitor.
The LTM8027 is packaged in a thermally enhanced, compact
(15mm
×
15mm) and low profile (4.32mm) over-molded
land grid array (LGA) package suitable for automated
assembly by standard surface mount equipment. The
LTM8027 is Pb-free and 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.
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Complete Switch Mode Power Supply
Wide Input Voltage Range: 4.5V to 60V
(7.5V Minimum Voltage to Start)
Wide Output Voltage Range: 2.5V to 24V
(See Table 2)
4A Output Current
Programmable Soft-Start
9µA Shutdown Supply Current
Selectable Switching Frequency Current Mode
Control
Up to 95% Efficiency
Pb-Free (e4) RoHS Compliant Package with
Gold Pad Finish
Tiny, Low Profile (15mm
×
15mm
×
4.32mm)
Surface Mount LGA Package
applicaTions
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12V and 42V Automotive and Heavy Equipment
48V Telecom Power Supplies
Avionics and Industrial Control Systems
Distributed Power Converters
Typical applicaTion
48W, 16V
IN
to 60V
IN
DC/DC µModule
®
Regulator
V
IN
16V TO 60V
4.7µF
×2
V
IN
1M
RUN
SS
SYNC
RT
48.7k
GND
LTM8027
BIAS1
AUX
ADJ
56.2k
22µF
×4
EFFICIENCY (%)
BIAS2
V
OUT
V
OUT
12V
4A
100
90
80
70
60
50
40
30
20
10
0
0
1
2
LOAD (A)
3
4
8027 TA01b
Efficiency vs Load
24V
IN
3845 TA01a
8027fb
1
LINER [ LINEAR TECHNOLOGY ]
