LTM4602 Datasheet, PDF (1/24 Pages) Linear Technology – 6A High Effi ciency DC/DC μModule

LTM4602
6A High Efficiency
DC/DC µModule
FEATURES
n _{Complete Switch Mode Power Supply}
n _{Wide Input Voltage Range: 4.5V to 20V}
n _{6A DC, 8A Peak 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 _{Pin Compatible with the LTM4600}
n _{Up to 92% Efficiency}
n _{Programmable Soft-Start}
n _{Output Overvoltage Protection}
n _{Optional Short-Circuit Shutdown Timer}
n _{See the LTM4602HV for Operation Up to 28VIN}
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}
TYPICAL APPLICATION
6A μModule^TM Power Supply with 4.5V to 20V Input
V_IN
4.5V TO 20V
V_IN
V_OUT
C_IN
LTM4602
C_OUT
V_OUT
1.5V
6A
V_OSET
PGND SGND
R_SET
66.5k
4602 TA01a
DESCRIPTION
The LTM^®4602 is a complete 6A 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
LTM4602 supports an output voltage range of 0.6V to 5V,
set by a single resistor. This high efficiency design delivers
6A continuous current (8A 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 LTM4602 is packaged in a thermally enhanced, compact
(15mm × 15mm) and low profile (2.8mm) over-molded
Land Grid Array (LGA) package suitable for automated as-
sembly by standard surface mount equipment. For the 4.5V
to 28V input range version, refer to the LTM4602HV.
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.
100
90
80
70
60
50
40
30
20
10
0
0
Efficiency vs Load Current
with 12V_IN (FCB = 0)
0.8V_OUT
1.2V_OUT
1.5V_OUT
1.8V_OUT
2.5V_OUT
3.3V_OUT
3.3V_OUT (950kHz)*
*950kHz INSTEAD OF 1.3MHz
INCREASES 3.3V EFFICIENCY 2%
2
4
6
8
LOAD CURRENT (A)
4602 TA01b
4602fa
1