LTM4606
Ultralow EMI 28V , 6A
IN
DC/DC µModule
FEATURES
DESCRIPTION
The LTM®4606 is a complete ultralow noise high voltage
6A switching mode DC/DC power supply. Included in the
packagearetheswitchingcontroller,powerFETs,inductor,
and all support components. The on-board input filter and
noisecancellationcircuitsachievelownoiseoperation,thus
effectivelyreducingtheelectromagneticinterference(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 efficiency design deliv-
ers 6A continuous current (8A peak). Only bulk input and
output capacitors are needed to finish the design.
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Complete Low EMI Switch Mode Power Supply
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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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Low Input and Output Referred Noise
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Output Voltage Tracking and Margining
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PLL Frequency Synchronization
±±.5ꢀ 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
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.
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Current Mode Control
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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)
Furthermore, the μModule™ can be synchronized with an
externalclockforreducingundesirablefrequencyharmonics
and allows PolyPhase® operation for high load currents.
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Small Surface Mount Footprint, Low Profile Package
(15mm × 15mm × 2.8mm)
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.
APPLICATIONS
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ASICs or FPGA Transceivers
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Telecom, Servers and Networking Equipment
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Industrial Equipment
L, LT, LTC, LTM and PolyPhase 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.
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Rf Equipment
TYPICAL APPLICATION
Radiated Emission Scan at ±2VIN,
2.5VOUT/6A
Ultralow Noise 2.5V/6A Power Supply with 4.5V to 28V Input
100
90
4.5V TO 28V
CLOCK SYNC
V
PLLIN
80
IN
2.5V AT 6A
V
PGOOD
RUN
COMP
OUT
70
LTM4606
47pF
FB
ON/OFF
C
OUT
60
50
40
30
20
10
0
V
FB
R
CISPR.22, CLASS B, 3 METERS
C
10μF
35V
IN
INTV
DRV
CC
CC
19.1k
FCB
MARG0
MARG1
MPGM
f
MARGIN
CERAMIC
x2
SET
TRACK/SS
CONTROL
CONTROL
TRACK/SS
V
D
392k
5% MARGIN
10μF
35V
SGND PGND
4606 TA01
0
100 200 300 400 500 600 700 800 9001000
FREQUENCY (MHz)
4606 TA01b
4606f
1