LTM4600
10A High Efficiency
DC/DC µModule
FEATURES
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DESCRIPTION
The LTM
®
4600 is a complete 10A, DC/DC step down power
supply. Included in the package are the switching control-
ler, power FETs, inductor, and all support components.
Operating over an input voltage range of 4.5V to 20V, the
LTM4600 supports an output voltage range of 0.6V to 5V,
set by a single resistor. This high efficiency design delivers
10A continuous current (14A peak), needing no heat sinks
or airflow to meet power specifications. Only bulk input
and output capacitors are needed to finish the design.
The low profile package (2.8mm) enables utilization of
unused space on the bottom of PC boards for high density
point of load regulation. High switching frequency and an
adaptive on-time current mode architecture enables a very
fast transient response to line and load changes without
sacrificing stability. Fault protection features include
integrated overvoltage and short circuit protection with
a defeatable shutdown timer. A built-in soft-start timer is
adjustable with a small capacitor.
The LTM4600 is packaged in a thermally enhanced, compact
(15mm
×
15mm) and low profile (2.8mm) over-molded
Land Grid Array (LGA) package suitable for automated
assembly by standard surface mount equipment. The
LTM4600 is Pb-free and RoHS compliant.
Complete Switch Mode Power Supply
Wide Input Voltage Range: 4.5V to 20V
10A DC, 14A Peak Output Current
Parallel Two μModule™ DC/DC Converters for 20A
Output Current
0.6V to 5V Output Voltage
1.5% Output Voltage Regulation
Ultrafast Transient Response
Current Mode Control
Pb-Free (e4) RoHS Compliant Package with Gold-
Pad Finish
Up to 92% Efficiency
Programmable Soft-Start
Output Overvoltage Protection
Optional Short-Circuit Shutdown Timer
Small Footprint, Low Profile (15mm × 15mm ×
2.8mm) Surface Mount LGA Package
APPLICATIONS
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Telecom and Networking Equipment
Servers
Industrial Equipment
Point of Load Regulation
L,
LT, LTC and LTM are registered trademarks of Linear Technology Corporation.
μModule is a trademark of Linear Technology Corporation. All other trademarks are the property
of their respective owners. Protected by U.S. Patents including 5481178, 6100678, 6580258,
5847554, 6304066.
TYPICAL APPLICATION
100
Efficiency vs Load Current
with 12V
IN
(FCB = 0)
90
80
EFFICIENCY (%)
70
60
50
40
4600 TA01a
10A μModule Power Supply with 4.5V to 20V Input
V
IN
4.5V TO 20V
V
IN
C
IN
V
OUT
LTM4600
V
OSET
PGND SGND
C
OUT
V
OUT
1.5V
10A
66.5k
30
20
0
2
4
6
LOAD CURRENT (A)
1.2V
OUT
1.5V
OUT
2.5V
OUT
3.3V
OUT
8
10
4600 TA01b
4600fc
1
LINER [ LINEAR TECHNOLOGY ]
