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Linear Technology - 15A DC/DC uModule Regulator

Numéro de référence LTM4611
Description 15A DC/DC uModule Regulator
Fabricant Linear Technology 
Logo Linear Technology 





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LTM4611 fiche technique
LTM4611www.DataSheet4U.com
Ultralow VIN, 15A DC/DC
µModule Regulator
Features
n Complete Switch Mode Power Supply
n Input Voltage Range: 1.5V to 5.5V
n 15A DC Output
n Output Voltage Range: 0.8V to 5V
n ±1.5% Total DC Output Error
n Differential Remote Sensing for Precision
Regulation
n Current Mode Control/ Fast Transient Response
n Overcurrent Foldback Protection
n Parallel Multiple LTM®4611s for Current Sharing
n Frequency Synchronization
n Selectable Pulse-Skipping or Burst Mode® Operation
n Soft-Start/Voltage Tracking
n Up to 94% Efficiency
n Output Overvoltage Protection
n Small 15mm × 15mm × 4.32mm LGA Package
Applications
n Telecom Servers and Networking Equipment
n Storage and ATCA Cards
n General Purpose Point of Load Regulation
Description
The LTM4611 is a high density 15A output, switch mode
DC/DC buck converter power supply capable of operating
from very low voltage input supplies. Included in the pack-
age are the buck switching controller, power FETs, induc-
tor and loop-compensation components. The LTM4611
delivers up to 15A continuous current at high efficiency
from an input voltage of 1.5VIN up to 5.5VIN. The output
voltage is set between 0.8V and 5V by a resistor. Only a
few input and output capacitors are needed.
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
tracking for supply rail sequencing.
The LTM4611 is available in a thermally enhanced 15mm
× 15mm × 4.32mm LGA package. The LTM4611 is PB-free
and RoHS compliant.
L, LT, LTC, LTM, Linear Technology, the Linear logo, Burst Mode, PolyPhase and µModule are
registered trademarks 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
1.5VIN to 5.5VIN, 15A Step-Down DC/DC µModule® Regulator
VIN
1.5V TO 5.5V
22µF
s3
CSS
0.1µF
VIN PGOOD
TRACK/SS
VOUT
LTM4611
VFB
RUN
VOUT_LCL
MODE_PLLIN
SGND
DIFFVOUT
VOSNS+
GND VOSNS–
VOUT**
STEP-DOWN
CFF* 15A
100µF*
s4
CP* RFB**
4611 TA01
*SEE TABLE 5
**SEE TABLE 1
Efficiency vs Load Current
96
94
92
90
88
86
84
82
80
78
0
5 10
LOAD CURRENT (A)
15
4611 TA01b
5VIN, 3.3VOUT
3.3VIN, 2.5VOUT
2.5VIN, 1.5VOUT
2.5VIN, 1.2VOUT
3.3VIN, 1VOUT
1.5VIN, 0.9VOUT
5VIN, 1VOUT
4611f


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