LTM4606
Ultralow EMI 28V , 6A
IN
DC/DC µModule Regulator
FeaTures
DescripTion
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Complete Low EMI Switch Mode Power Supply
The LTM®4606 is a complete EN55022 Class B certified
noisehighvoltage6AswitchingmodeDC/DCpowersupply.
Includedinthepackagearetheswitchingcontroller,power
FETs, inductor, and all support components. The on-board
inputfilterandnoisecancellationcircuitsachievelownoise
operation, thus effectively reducing the electromagnetic
interference (EMI). Operating over an input voltage range
of 4.5V to 28V, the LTM4606 supports an output voltage
range of 0.6V to 5V, set by a single resistor. This high ef-
ficiency design delivers 6A continuous current (8A peak).
Only bulk input and output capacitors are needed to finish
the design.
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Wide Input Voltage Range: 4.5V to 28V
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6A DC Typical, 8A Peak Output Current
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0.6V to 5V Output Voltage Range
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EN55022 Class B Certified
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Output Voltage Tracking and Margining
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PLL Frequency Synchronization
±±.ꢀ5ꢁ Total DC Error
Power Good Output
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Current Foldback Protection (Disabled at Start-Up)
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Parallel/Current Sharing
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Ultrafast Transient Response
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Current Mode Control
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. The
device supports output voltage tracking and output volt-
age margining.
Furthermore,theµModule® regulatorcanbesynchronized
with an external clock for reducing undesirable frequency
harmonics and allows PolyPhase® operation for high load
currents.
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Up to 93% Efficiency at 5V , 3.3V
IN
OUT
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Programmable Soft-Start
Output Overvoltage Protection
–55°C to 125°C Operating Temperature Range
(LTM4606MPV)
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Small Surface Mount Footprint, Low Profile Package
(15mm × 15mm × 2.8mm)
applicaTions
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ASICs or FPGA Transceivers
The LTM4606 is offered in a space saving and thermally
enhanced 15mm × 15mm × 2.8mm LGA package, which
enables utilization of unused space on the bottom of
PC boards for high density point of load regulation. The
LTM4606 is Pb-free and RoHS compliant.
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Telecom, Servers and Networking Equipment
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Industrial Equipment
RF Equipment
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L, LT, LTC, LTM, Linear Technology, the Linear logo, µModule and PolyPhase are registered
trademarks of Linear Technology Corporation. All other trademarks are the property of their
respective owners.
Typical applicaTion
Radiated Emission Scan at ±2VIN, 2.5VOUT/6A
50
Ultralow Noise 2.5V/6A Power Supply with 4.5V to 28V Input
40
30
4.5V TO 28V
CLOCK SYNC
V
PLLIN
IN
2.5V AT 6A
20
10
V
PGOOD
RUN
COMP
OUT
LTM4606
47pF
FB
ON/OFF
C
OUT
V
FB
R
C
0
IN
INTV
DRV
CC
CC
19.1k
10µF
35V
FCB
–10
–20
–30
MARG0
MARG1
MPGM
f
MARGIN
CERAMIC
x2
SET
TRACK/SS
CONTROL
CONTROL
TRACK/SS
V
D
392k
5% MARGIN
10µF
35V
SGND PGND
30
226.2
128.1 324.3
FREQUENCY (MHz)
422.4
618.6
814.8
1010
520.5
716.7
912.9
4606 TA01a
4606 TA01b
4606fb
1