LTM4600_06 Datasheet, PDF (1/24 Pages) Linear Technology – 10A High Effi ciency DC/DC μModule

LTM4600
10A High Efficiency
DC/DC µModule
FEATURES
n _{Complete Switch Mode Power Supply}
n _{Wide Input Voltage Range: 4.5V to 20V}
n _{10A DC, 14A Peak Output Current}
n _{Parallel Two μModule™ DC/DC Converters for 20A}
Output Current
n _{0.6V to 5V Output Voltage}
n _{1.5% Output Voltage Regulation}
n _{Ultrafast Transient Response}
n _{Current Mode Control}
n _{Pb-Free (e4) RoHS Compliant Package with Gold-}
Pad Finish
n _{Up to 92% Efficiency}
n _{Programmable Soft-Start}
n _{Output Overvoltage Protection}
n _{Optional Short-Circuit Shutdown Timer}
n _{Small Footprint, Low Profile (15mm × 15mm ×}
2.8mm) Surface Mount LGA Package
APPLICATIONS
n _{Telecom and Networking Equipment}
n _Servers
n _{Industrial Equipment}
n _{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.
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.
TYPICAL APPLICATION
10A μModule Power Supply with 4.5V to 20V Input
V_IN
4.5V TO 20V
V_IN
V_OUT
C_IN
LTM4600
C_OUT
V_OUT
1.5V
10A
V_OSET
PGND SGND
66.5k
4600 TA01a
Efficiency vs Load Current
with 12V_IN (FCB = 0)
100
90
80
70
60
50
40
1.2V_OUT
30
1.5V_OUT
2.5V_OUT
3.3V_OUT
20
0
2
4
6
8
10
LOAD CURRENT (A)
4600 TA01b
4600fc
1