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
compensationcomponents.Operatingoveraninputvoltage
range from 4.5V to 20V, the LTM4627 supports an output
voltagerangeof0.6Vto5V,setbyasingleexternalresistor.
Only a few input and output capacitors are needed.
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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 (–40°C to 125°C)
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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 Package
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)
IN
OUT
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The LTM4627 is offered in a thermally enhanced 15mm ×
15mm × 4.32mm LGA package. The LTM4627 is PB-free
and RoHS compliant.
L, LT, LTC, LTM, Linear Technology, the Linear logo, Burst Mode and μModule are registered
trademarks of Linear Technology Corporation. PolyPhase is a registered 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
V
SET
OSNS
–
100k
MODE_PLLIN
OSNS
V
12V , 1.2V
IN
OUT
FB
SGND
5V , 1.2V
IN OUT
R
**
FB
60.4k
0
2
4
6
8
10 12 14 16
*
SEE TABLE 4
4627 TA01a
LOAD CURRENT (A)
** SEE TABLE 1
4627 TA01b
4627f
1