LTM4606 Datasheet, PDF (1/24 Pages) Linear Technology – Ultralow EMI 28VIN, 6A DC/DC μModule

LTM4606
Ultralow EMI 28V_IN, 6A
DC/DC µModule
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 _{Low Input and Output Referred Noise}
n _{Output Voltage Tracking and Margining}
n _{PLL Frequency Synchronization}
n _{±1.5% 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}
DESCRIPTION
The LTM^®4606 is a complete ultralow 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 deliv-
ers 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™ 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.
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.
TYPICAL APPLICATION
Ultralow Noise 2.5V/6A Power Supply with 4.5V to 28V Input
4.5V TO 28V
CLOCK SYNC
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
47pF
R_FB
19.1k
MARGIN
CONTROL
392k
5% MARGIN
4606 TA01
2.5V AT 6A
C_OUT
Radiated Emission Scan at 12V_IN,
2.5V_OUT/6A
100
90
80
70
60
50
CISPR.22, CLASS B, 3 METERS
40
30
20
10
0
0 100 200 300 400 500 600 700 800 900 1000
FREQUENCY (MHz)
4606 TA01b
4606f
1