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LTM8027
60V, 4A DC/DC
μModule Regulator
Complete Switch Mode Power Supply
Wide Input Voltage Range: 4.5V to 60V
Wide Output Voltage Range: 2.5V to 24V
4A Output Current
Programmable Soft-Start
9μA Shutdown Supply Current
Selectable Switching Frequency Current Mode
Up to 95% Efficiency
Pb-Free (e4) RoHS Compliant Package with
Tiny, Low Profile (15mm × 15mm × 4.32mm)
12V and 42V Automotive and Heavy Equipment
48V Telecom Power Supplies
Avionics and Industrial Control Systems
Distributed Power Converters
FEATURES
n
n
(7.5V Minimum Voltage to Start)
n
(See Table 2)
n
n
n
n
Control
n
n
Gold Pad Finish
n
Surface Mount LGA Package
APPLICATIONS
n
n
n
n
TYPICAL APPLICATION
48W, 16V IN to 60V IN DC/DC μModule ? Regulator
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.
Efficiency vs Load
V IN
16V TO 60V
4.7 μ F
× 2
1M
V IN
RUN
SS
SYNC
RT
V OUT
LTM8027
BIAS1
BIAS2
AUX
ADJ
V OUT
12V
4A
22 μ F
× 4
100
90
80
70
60
50
24V IN
48.7k
GND
56.2k
3845 TA01a
40
30
20
10
0
0
1
2
3
4
LOAD (A)
8027 TA01b
8027fb
1
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