Datasheet LTM4611 (Analog Devices)

LTM4611 Ultralow VIN, 15A DC/DC µModule Regulator
FeaTures DescripTion
n
Complete Switch Mode Power Supply
The LTM®4611 is a high density 15A output, switch mode n
Input Voltage Range: 1.5V to 5.5V
DC/DC buck converter power supply capable of operating n
15A DC Output
from very low voltage input supplies. Included in the pack- n
Output Voltage Range: 0.8V to 5V
age are the buck switching control er, power FETs, induc- n
±1.5% Total DC Output Error
tor and loop-compensation components. The LTM4611 n
Differential Remote Sensing for Precision Regulation
delivers up to 15A continuous current at high efficiency n
Current Mode Control/ Fast Transient Response
from an input voltage of 1.5VIN up to 5.5VIN. The output n
Overcurrent Foldback Protection
voltage is set between 0.8V and 5V by a resistor. Only a n
Parallel Multiple LTM
®
4611s for Current Sharing
few input and output capacitors are needed. n
Frequency Synchronization
High switching frequency and a current mode architecture n Selectable Pulse-Skipping or Burst Mode® Operation enable a very fast transient response to line and load n Soft-Start/Voltage Tracking changes without sacrificing stability. The device supports n Up to 94% Efficiency frequency synchronization, multiphase/current sharing n Output Overvoltage Protection operation, Burst Mode operation and output voltage track- n Small 15mm × 15mm × 4.32mm LGA Package ing for supply rail sequencing. The LTM4611 is available in a thermal y enhanced 15mm
applicaTions
× 15mm × 4.32mm LGA package. The LTM4611 is PB-free n Telecom Servers and Networking Equipment and RoHS compliant. n Storage and ATCA Cards L, LT, LTC, LTM, Linear Technology, the Linear logo, Burst Mode, PolyPhase and µModule are n General Purpose Point of Load Regulation 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.
Click to view associated TechClip Videos. Typical applicaTion 1.5VIN to 5.5VIN, 15A Step-Down DC/DC µModule® Regulator Efficiency vs Load Current
96 VIN 1.5V TO 5.5V 22µF 94 ×3 CSS 0.1µF VIN PGOOD 92 VOUT** TRACK/SS VOUT STEP-DOWN 90 CFF* 15A 5VIN, 3.3VOUT LTM4611 VFB 88 3.3VIN, 2.5VOUT 2.5V RUN V IN, 1.5VOUT OUT_LCL 100µF* ×4 86 2.5VIN, 1.2VOUT MODE_PLLIN DIFFV 3.3V OUT EFFICIENCY (%) IN, 1VOUT 84 1.5VIN, 0.9VOUT V + OSNS 5V 82 IN, 1VOUT V – OSNS SGND GND 80 CP* RFB** *SEE TABLE 5 78 **SEE TABLE 1 0 5 10 15 4611 TA01 LOAD CURRENT (A) 4611 TA01b 4611fb For more information www.linear.com/LTM4611 1 Document Outline Features Applications Description Typical Application Absolute Maximum Ratings Pin Configuration Order Information Electrical Characteristics Typical Performance Characteristics Pin Functions Block Diagram Decoupling Requirements Operation Applications Information Typical Applications Package Photograph Package Description Revision History Typical Application Related Parts