LTM4606_1 Datasheet, PDF (1/28 Pages) Linear Technology – Ultralow EMI 28VIN, 6A DC/DC μModule Regulator

LTM4606
Ultralow EMI 28V_IN, 6A
DC/DC µModule Regulator
Features
n _{Complete Low EMI Switch Mode Power Supply}
n _{Wide Input Voltage Range: 4.5V to 28V}
n _{6A DC Typical, 8A Peak Output Current}
n _{0.6V to 5V Output Voltage Range}
n _{EN55022 Class B Certified}
n _{Output Voltage Tracking and Margining}
n _{PLL Frequency Synchronization}
n _{±1.75% Total DC Error}
n _{Power Good Output}
n _{Current Foldback Protection (Disabled at Start-Up)}
n _{Parallel/Current Sharing}
n _{Ultrafast Transient Response}
n _{Current Mode Control}
n _{Up to 93% Efficiency at 5VIN, 3.3VOUT}
n _{Programmable Soft-Start}
n _{Output Overvoltage Protection}
n _{–55°C to 125°C Operating Temperature Range}
(LTM4606MPV)
n _{Small Surface Mount Footprint, Low Profile Package}
(15mm × 15mm × 2.8mm)
Applications
n _{ASICs or FPGA Transceivers}
n _{Telecom, Servers and Networking Equipment}
n _{Industrial Equipment}
n _{RF Equipment}
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.
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 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.
Typical Application
Ultralow Noise 2.5V/6A Power Supply with 4.5V to 28V Input
4.5V TO 28V
C_IN
10µF
35V
CERAMIC
x2
ON/OFF
TRACK/SS
CONTROL
10µF
35V
V_IN PLLIN
PGOOD
V_OUT
RUN ^LTM4606
COMP
V_FB
INTV_CC
DRV_CC
f_SET
TRACK/SS
FCB
MARG0
MARG1
V_D
MPGM
SGND PGND
CLOCK SYNC
47pF
R_FB
19.1k
MARGIN
CONTROL
392k
5% MARGIN
4606 TA01a
2.5V AT 6A
C_OUT
Radiated Emission Scan at 12V_IN, 2.5V_OUT/6A
50
40
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
4606fb
1