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LTM4602
6A High Ef?ciency
DC/DC μModule
FEATURES
DESCRIPTION
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Complete Switch Mode Power Supply
Wide Input Voltage Range: 4.5V to 20V
6A DC, 8A Peak 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
Pin Compatible with the LTM4600
Up to 92% Ef?ciency
Programmable Soft-Start
Output Overvoltage Protection
Optional Short-Circuit Shutdown Timer
See the LTM4602HV for Operation Up to 28V IN
Small Footprint, Low Pro?le (15mm × 15mm ×
2.8mm) Surface Mount LGA Package
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 ef?ciency design delivers
6A continuous current (8A peak), needing no heat sinks or
air?ow to meet power speci?cations. Only bulk input and
output capacitors are needed to ?nish the design.
The low pro?le 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
sacri?cing stability. Fault protection features include
integrated overvoltage and short circuit protection with
a defeatable shutdown timer. A built-in soft-start timer is
Telecom and Networking Equipment
Servers
Industrial Equipment
Point of Load Regulation
APPLICATIONS
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TYPICAL APPLICATION
6A μModule TM Power Supply with 4.5V to 20V Input
adjustable with a small capacitor.
The LTM4602 is packaged in a thermally enhanced, compact
(15mm × 15mm) and low pro?le (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.
Ef?ciency vs Load Current
with 12V IN (FCB = 0)
100
90
80
V IN
4.5V TO 20V
C IN
V IN V OUT
LTM4602
V OSET
PGND SGND
C OUT
R SET
66.5k
4602 TA01a
V OUT
1.5V
6A
70
60
50
40
30
20
0.8V OUT
1.2V OUT
1.5V OUT
1.8V OUT
2.5V OUT
3.3V OUT
3.3V OUT (950kHz)*
10
*950kHz INSTEAD OF 1.3MHz
INCREASES 3.3V EFFICIENCY 2%
0
0
2
4
6
8
LOAD CURRENT (A)
4602 TA01b
4602fa
1
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