Datasheet LTM4601HV (Analog Devices)

LTM4601HV 12A 28VIN DC/DC µModule Regulator with PLL, Output Tracking and Margining
FEATURES DESCRIPTION
n
Complete Switch Mode Power Supply
The LTM®4601HV is a complete 12A step-down switch n
Wide Input Voltage Range: 4.5V to 28V
mode DC/DC power supply with onboard switching control- n
12A DC Typical, 14A Peak Output Current
ler, MOSFETs, inductor and all support components. The n
0.6V to 5V Output Voltage
µModule regulator is housed in smal surface mount 15mm n
Output Voltage Tracking and Margining
× 15mm × 2.82mm LGA and 15mm × 15mm × 3.42mm n
Parallel Multiple µModule® Regulators for Current
BGA packages. Operating over an input voltage range of
Sharing
4.5V to 28V, the LTM4601HV supports an output voltage n
Differential Remote Sensing for Precision Regulation
range of 0.6V to 5V as well as output voltage tracking n
PLL Frequency Synchronization
and margining. The high efficiency design delivers 12A n
±1.5% Regulation
continuous current (14A peak). Only bulk input and output n
Current Foldback Protection (Disabled at Start-Up)
capacitors are needed to complete the design. n RoHS Compliant with Pb-Free Finish, The low profile and light weight package easily mounts Gold Finish LGA (e4) or SAC 305 BGA (e1) 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
APPLICATIONS
to accurately regulate an output voltage independent of load current. n Telecom and Networking Equipment n Servers L, LT, LTC, LTM, Linear Technology, the Linear logo, µModule and PolyPhase are registered trademarks and LTpowerCAD is a trademark of Linear Technology Corporation. All other n Industrial Equipment trademarks are the property of their respective owners. Protected by U.S. Patents including 5481178, 5847554, 6580258, 6304066, 6476589, 6774611, 6677210. n Point of Load Regulation
TYPICAL APPLICATION Efficiency and Power Loss 2.5V/12A Power Supply with 4.5V to 28V Input vs Load Current
95 6 CLOCK SYNC V 12V IN IN TRACK/SS CONTROL 90 4.5V TO 28V 5 V 85 IN PLLIN TRACK/SS VOUT PGOOD V 24VIN OUT 2.5V POWER LOSS (W) 80 100pF 12A 4 EFFICIENCY VFB 75 ON/OFF RUN MARG0 MARGIN 70 3 COMP MARG1 CONTROL LTM4601HV COUT 24V C IN IN INTV 65 CC VOUT_LCL EFFICIENCY (%) 12VIN DRV 2 CC DIFFVOUT 60 MPGM V + POWER LOSS OSNS 55 V – 1 OSNS R1 50 392k SGND PGND fSET RSET 19.1k 45 0 5% MARGIN 0 2 4 6 8 10 12 14 4601HV TA01a LOAD CURRENT (A) 4601HV TA01b 4601hvfb 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