Datasheet LTM4601AHV (Analog Devices)

LTM4601AHV 12A, 28VIN DC/DC µModule Regulator with PLL, Output Tracking and Margining
FeaTures DescripTion
n
Complete Switch Mode Power Supply
The LTM®4601AHV is a complete 12A step-down switch n
Wide Input Voltage Range: 4.5V to 28V
mode DC/DC power supply with onboard switching con- n
12A DC Typical, 14A Peak Output Current
troller, MOSFETs, inductor and all support components. n
0.6V to 5V Output Voltage
The µModule regulator is housed in a small surface mount n
Output Voltage Tracking and Margining
15mm × 15mm × 2.82mm LGA or 15mm × 15mm × n
Redundant Mounting Pads for Enhanced
3.42mm BGA package. The LTM4601AHV LGA and BGA
Solder-Joint Strength
packages are designed with redundant mounting pads to n
Parallel Multiple µModule
®
Regulators for
enhance solder-joint strength for extended temperature
Current Sharing
cycling endurance. Operating over an input voltage range n
Differential Remote Sensing for Precision Regulation
of 4.5V to 28V, the LTM4601AHV supports an output volt- n
PLL Frequency Synchronization
age range of 0.6V to 5V as well as output voltage tracking n ±
1.5% Total DC Error
and margining. The high efficiency design delivers 12A n
Current Foldback Protection (Disabled at Start-Up)
continuous current (14A peak). Only bulk input and output n SnPb or RoHS Compliant Finish capacitors are needed to complete the design. n –55°C to 125°C Operating Temperature Range The low profile and light weight package easily mounts (LTM4601AHVMPV) in unused space on the back side of PC boards for high n Ultrafast™ Transient Response density point of load regulation. The µModule regulator n Up to 95% Efficiency at 5VIN, 3.3VOUT can be synchronized with an external clock for reducing n Programmable Soft-Start undesirable frequency harmonics and allows PolyPhase® n Output Overvoltage Protection operation for high load currents. n Enhanced (15mm × 15mm × 2.82mm) Surface Mount LGA and (15mm × 15mm × 3.42mm) BGA Packages An onboard differential remote sense amplifier can be used to accurately regulate an output voltage independent of load current. The LTM4601AHV is available with SnPb or
applicaTions
RoHS compliant terminal finish. n Telecom, Industrial and Networking Equipment L, LT, LTC and LTM, Linear Technology, the Linear logo, µModule and PolyPhase are registered trademarks and Ultrafast and LTpowerCAD are trademarks of Linear Technology n Military and Avionics Systems 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 Efficiency and Power Loss 2.5V/12A Power Supply with 4.5V to 28V Input vs Load Current
95 6 12VIN CLOCK SYNC 90 EFFICIENCY VIN TRACK/SS CONTROL 4.5V TO 28V 5 85 VIN PLLIN TRACK/SS V 24VIN OUT POWER LOSS (W) 80 PGOOD VOUT 2.5V 4 100pF 12A 75 POWER LOSS VFB 70 3 ON/OFF RUN MARG0 MARGIN 24V COMP MARG1 CONTROL C 65 IN LTM4601AHV OUT CIN EFFICIENCY (%) 12V INTVCC V IN OUT_LCL 60 2 DRVCC DIFFVOUT+ 55 MPGM VOSNS 1 V – OSNS 50 R1 392k SGND PGND fSET RSET 45 0 19.1k 0 2 4 6 8 10 12 14 5% MARGIN 4601AHV TA01a LOAD CURRENT (A) 4601AHV TA01b 4601ahvfc For more information www.linear.com/LTM4601AHV 1 Document Outline Features Applications Description Typical Application Absolute Maximum Ratings Pin Configuration Order Information Electrical Characteristics Typical Performance Characteristics Pin Functions Simplified Block Diagram Decoupling Requirements Operation Applications Information Typical Applications Package Description Revision History Package Photos Related Parts