Datasheet LTM4601, LTM4601-1 (Analog Devices)

LTM4601/LTM4601-1 12A µModule Regulators with PLL, Output Tracking and Margining
FeaTures DescripTion
n
Complete Switch Mode Power Supply
The LTM®4601 is a complete 12A step-down switch mode n
Wide Input Voltage Range: 4.5V to 20V
DC/DC power supply with onboard switching controller, n
12A DC Typical, 14A Peak Output Current
MOSFETs, inductor and all support components. The n
0.6V to 5V Output Voltage
µModule® regulator is housed in small surface mount n
Output Voltage Tracking and Margining
15mm × 15mm × 2.82mm LGA and 15mm × 15mm × n
Parallel Multiple µModule Regulators for Current
3.42mm BGA packages. Operating over an input voltage
Sharing
range of 4.5V to 20V, the LTM4601 supports an output n
Differential Remote Sensing for Precision
voltage range of 0.6V to 5V as well as output voltage
Regulation (LTM4601 Only)
tracking and margining. The high efficiency design deliv- n
PLL Frequency Synchronization
ers 12A continuous current (14A peak). Only bulk input n
±1.5% Regulation
and output capacitors are needed to complete the design. n
Current Foldback Protection (Disabled at Start-Up)
The low profile and light weight package easily mounts n SnPb or RoHS Compliant Finish 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 Current Mode Control can be synchronized with an external clock for reducing n Up to 95% Efficiency at 5VIN, 3.3VOUT undesirable frequency harmonics and allows PolyPhase® n Programmable Soft-Start operation for high load currents. n Output Overvoltage Protection n Small Footprint, Low Profile A high switching frequency and adaptive on-time current (15mm × 15mm × 2.82mm) Surface Mount LGA and mode architecture deliver a very fast transient response (15mm × 15mm × 3.42mm) BGA Packages to line and load changes without sacrificing stability. An onboard differential remote sense amplifier can be used to accurately regulate an output voltage independent of
applicaTions
load current. The onboard remote sense amplifier is not n Telecom and Networking Equipment available in the LTM4601-1. n Servers L, LT, LTC, LTM, Linear Technology, the Linear logo, µModule and PolyPhase are registered n Industrial Equipment trademarks and UltraFast and LTpowerCAD are trademarks of Linear Technology Corporation. All other trademarks are the property of their respective owners. Protected by U.S. Patents n Point of Load Regulation including 5481178, 5847554, 6580258, 6304066, 6476589, 6774611, 6677210.
Typical applicaTion Efficiency and Power Loss vs Load Current 1.5V/12A Power Supply with 4.5V to 20V Input
95 4.0 CLOCK SYNC EFFICIENCY 5VIN VIN 90 TRACK/SS CONTROL 3.5 4.5V TO 20V 85 VIN PLLIN TRACK/SS VOUT 12VIN 3.0 POWER LOSS (W) PGOOD VOUT 1.5V 80 100pF 12A V 2.5 FB 75 ON/OFF RUN MARG0 MARGIN 12VIN 70 COMP MARG1 CONTROL 2.0 LTM4601 COUT C 5V IN IN INTV EFFICIENCY (%) CC VOUT_LCL 65 1.5 DRVCC DIFFVOUT 60 MPGM V + OSNS POWER LOSS 1.0 V – OSNS 55 R1 392k SGND PGND fSET RSET 50 0.5 40.2k 0 2 4 6 8 10 12 14 5% MARGIN 4601 TA01a LOAD CURRENT (A) 4601 TA01b 4601fe For more information www.linear.com/LTM4601 1 Document Outline Features Applications Description Typical Application Absolute Maximum Ratings Pin Configuration Electrical Characteristics Typical Performance Characteristics Pin Functions Simplified Block Diagram Decoupling Requirements Operation Applications Information Typical Applications Package Description Revision History Package Photo Related Parts