LTM4606
Ultralow EMI 28VIN, 6A
DC/DC µModule Regulator
Features
Description
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 5VIN , 3.3VOUT
Programmable Soft-Start
Output Overvoltage Protection
–55°C to 125°C Operating Temperature Range
(LTM4606MP)
n SnPb or RoHS Compliant Finish
n 15mm × 15mm × 2.82mm LGA Package
15mm × 15mm × 3.42mm BGA Package
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 efficiency design delivers 6A continuous current (8A peak).
Only bulk input and output capacitors are needed to finish
the design.
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
Applications
n
n
n
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 packages. The LTM4606 is available with SnPb (BGA) or RoHS
compliant terminal finish.
ASICs or FPGA Transceivers
Telecom, Servers and Networking Equipment
Industrial Equipment
RF Equipment
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.
Typical Application
Radiated Emission Scan at 12VIN, 2.5VOUT/6A
50
Ultralow Noise 2.5V/6A Power Supply with 4.5V to 28V Input
4.5V TO 28V
ON/OFF
CIN
10µF
35V
CERAMIC
x2
40
CLOCK SYNC
TRACK/SS
CONTROL
10µF
35V
VIN
PLLIN
VOUT
PGOOD
RUN LTM4606
COMP
INTVCC
DRVCC
fSET
TRACK/SS
VD
SGND
2.5V AT 6A
47pF
VFB
FCB
MARG0
MARG1
MPGM
PGND
COUT
RFB
19.1k
MARGIN
CONTROL
392k
5% MARGIN
4606 TA01a
SIGNAL AMPLITUDE (dBµV/m)
n
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 voltage margining.
30
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
