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LTM4606
Ultralow EMI 28V IN , 6A
DC/DC μModule Regulator
Complete Low EMI Switch Mode Power Supply
Wide Input Voltage Range: 4.5V to 28V
6A DC Typical, 8A Peak Output Current
0.6V to 5V Output Voltage Range
EN55022 Class B Certified
Output Voltage Tracking and Margining
PLL Frequency Synchronization
±1.75% Total DC Error
Power Good Output
Current Foldback Protection (Disabled at Start-Up)
Parallel/Current Sharing
Current Mode Control
Up to 93% Efficiency at 5V IN , 3.3V OUT
Programmable Soft-Start
Output Overvoltage Protection
–55°C to 125°C Operating Temperature Range
SnPb or RoHS Compliant Finish
15mm × 15mm × 2.82mm LGA Package
ASICs or FPGA Transceivers
Telecom, Servers and Networking Equipment
Industrial Equipment
RF Equipment
FEATURES
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(LTM4606MP)
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15mm × 15mm × 3.42mm BGA Package
APPLICATIONS
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TYPICAL APPLICATION
Ultralow Noise 2.5V/6A Power Supply with 4.5V to 28V Input
DESCRIPTION
The LTM ? 4606 is a complete EN55022 Class B certified
noise high voltage 6A switching mode DC/DC power supply.
Included in the package are the switching controller, power
FETs, inductor, and all support components. The on-board
input filter and noise cancellation circuits achieve low noise
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.
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, the μModule ? regulator can be synchronized
with an external clock for reducing undesirable frequency
harmonics and allows PolyPhase ? operation for high load
currents.
The LTM4606 is offered in space saving 15mm × 15mm ×
2.82mm LGA and 15mm × 15mm × 3.42mm BGA pack-
ages. The LTM4606 is available with SnPb (BGA) or RoHS
compliant terminal finish.
L , LT, LTC, LTM, μModule, PolyPhase, Linear Technology, the Linear logo are registered
trademarks and UltraFast and LTpowerCAD are trademarks of Linear Technology Corporation.
All other trademarks are the property of their respective owners. Protected by U.S. Patents
including 5481178, 5847554, 6304066, 6476589, 6580258, 6677210, 6774611, 8163643.
Radiated Emission Scan at 12V IN , 2.5V OUT /6A
50
40
4.5V TO 28V
CLOCK SYNC
30
RUN
C IN
10μF
35V
CERAMIC
x2
ON/OFF
TRACK/SS
CONTROL
10μF
35V
V IN PLLIN
PGOOD V OUT
LTM4606
COMP V FB
INTV CC
DRV CC FCB
f SET MARG0
TRACK/SS MARG1
V D MPGM
SGND PGND
MARGIN
CONTROL
392k
5% MARGIN
4606 TA01a
47pF
R FB
19.1k
2.5V AT 6A
C OUT
20
10
0
–10
–20
–30
30
226.2 422.4 618.6 814.8 1010
128.1 324.3 520.5 716.7 912.9
FREQUENCY (MHz)
4606 TA01b
4606fd
For more information www.linear.com/LTM4606
1
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