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Linear Technology Corporation - 15A output high efficiency switch mode DC/DC power supply

Numéro de référence LTM4627
Description 15A output high efficiency switch mode DC/DC power supply
Fabricant Linear Technology Corporation 
Logo Linear Technology Corporation 





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LTM4627 fiche technique
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FEATURES
n Complete 15A Switch Mode Power Supply
n Wide Input Voltage Range: 4.5V to 20V
n 0.6V to 5V Output Range
n ±1.5% Total DC Output Error (–40°C to 125°C)
n Differential Remote Sense Amplifier for Precision
Regulation
n Current Mode Control/ Fast Transient Response
n Frequency Synchronization
n Parallel Current Sharing (Up to 60A)
n Selectable Pulse-Skipping or Burst Mode® Operation
n Soft-Start/Voltage Tracking
n Up to 93% Efficiency (12VIN, 3.3VOUT)
n Overcurrent Foldback Protection
n Output Overvoltage Protection
n Small Surface Mount Footprint, Low Profile
15mm × 15mm × 4.32mm LGA Package
APPLICATIONS
n Telecom Servers and Networking Equipment
n ATCA and Storage Cards
n Industrial Equipment
n Medical Systems
LTM4627
15A DC/DC µModule
Regulator
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.
Only a few input and output capacitors are needed.
Current mode operation allows precision current sharing
of up to four LTM4627 regulators to obtain 60A output.
High switching frequency and a current mode architecture
enable a very fast transient response to line and load
changes without sacrificing stability. The device supports
frequency synchronization, multiphase/current sharing
operation, Burst Mode operation and output voltage track-
ing for supply rail sequencing.
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.
TYPICAL APPLICATION
1.2V, 15A DC/DC μModule® Regulator
VIN
4.5V TO 16V
22μF
16V
×3 10k
150pF
0.1μF
100k
* SEE TABLE 4
** SEE TABLE 1
VIN EXTVCC INTVCC PGOOD
COMP
VOUT
TRACK/SS
VOUT_LCL
LTM4627
RUN DIFF_OUT
fSET
MODE_PLLIN
VOSNS+
VOSNS–
SGND GND
VFB
RFB**
60.4k
+
82pF
470μF
6.3V
VOUT
1.2V
15A
100μF*
6.3V
4627 TA01a
Efficiency vs Load Current
95
90
85
80
75
70
65
60
55 12VIN, 1.2VOUT
5VIN, 1.2VOUT
50
0 2 4 6 8 10 12 14 16
LOAD CURRENT (A)
4627 TA01b
4627f
1

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