Datasheet LTM4627 (Analog Devices)

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