LTM4627
15A DC/DC µModule
Regulator
FEATURES
DESCRIPTION
The LTM®4627 is a complete 15A output high efficiency
switch mode DC/DC power supply. Included in the pack-
age are the switching controller, power FETs, inductor
and compensation components. Operating over an input
voltage range from 4.5V to 20V, the LTM4627 supports an
output voltage range of 0.6V to 5V, set by a single external
resistor.Onlyafewinputandoutputcapacitorsareneeded.
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Complete 15A Switch Mode Power Supply
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Wide Input Voltage Range: 4.5V to 20V
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0.6V to 5V Output Range
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1.5ꢀ ꢁotal DC Output Error
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Differential Remote Sense Amplifier for Precision
Regulation
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Current Mode Control/ Fast ꢁransient Response
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Frequency Synchronization
Current mode operation allows precision current sharing
of up to four LTM4627 regulators to obtain 60A output.
Highswitchingfrequencyandacurrentmodearchitecture
enable a very fast transient response to line and load
changes without sacrificing stability. The device supports
frequency synchronization, multiphase/current sharing
operation, BurstModeoperationandoutputvoltagetrack-
ing for supply rail sequencing.
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Parallel Current Sharing (Up to 60A)
Selectable Pulse-Skipping or Burst Mode® Operation
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Soft-Start/Voltage Tracking
Up to 93% Efficiency (12V , 3.3V
Overcurrent Foldback Protection
Output Overvoltage Protection
Small Surface Mount Footprint, Low Profile
15mm × 15mm × 4.32mm LGA and
15mm × 15mm × 4.92mm BGA Packages
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)
OUT
IN
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The LTM4627 is offered in thermally enhanced 15mm ×
15mm× 4.32mmLGAand15mm× 15mm× 4.92mmBGA
packages. The LTM4627 is available with SnPb (BGA) or
RoHS compliant terminal finish.
L, LT, LTC, LTM, Linear Technology, the Linear logo, Burst Mode, µModule and PolyPhase
are registered trademarks and LTpowerCAD is a trademark of Linear Technology Corporation.
All other trademarks are the property of their respective owners. Protected by U.S. Patents,
including 5481178, 5847554, 6580258, 6304066, 6476589, 6774611, 6677210.
APPLICATIONS
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Telecom Servers and Networking Equipment
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ATCA and Storage Cards
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Industrial Equipment
Medical Systems
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TYPICAL APPLICATION
1.2V, 15A DC/DC µModule® Regulator
Efficiency vs Load Current
95
90
85
V
IN
4.5V TO 16V
22µF
16V
×3
150pF
10k
V
EXTV
CC
INTV
PGOOD
CC
IN
V
1.2V
15A
OUT
80
75
70
65
60
55
50
0.1µF
COMP
V
OUT
V
OUT_LCL
+
470µF
6.3V
TRACK/SS
RUN
LTM4627
GND
DIFF_OUT
+
100µF*
6.3V
82pF
f
V
OSNS
SET
–
100k
MODE_PLLIN
V
OSNS
V
12V , 1.2V
FB
IN
OUT
SGND
R
**
5V , 1.2V
IN
FB
OUT
60.4k
0
2
4
6
8
10 12 14 16
*
SEE TABLE 4
4627 TA01a
** SEE TABLE 1
LOAD CURRENT (A)
4627 TA01b
4627fc
1
For more information www.linear.com/LTM4627