Datasheet LTM4601A, LTM4601A-1 (Analog Devices)

LTM4601A/LTM4601A-1 12A µModule Regulators with PLL, Output Tracking and Margining
FEATURES DESCRIPTION
n
Complete Switch Mode Power Supply
The LTM®4601A 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 a small surface mount n
Output Voltage Tracking and Margining
15mm × 15mm × 2.82mm LGA or 15mm × 15mm × n
Redundant Mounting Pads for Enhanced Solder-
3.42mm BGA package. The LTM4601A LGA and BGA
Joint Strength
packages are designed with redundant mounting pads to n
Parallel Multiple µModules for Current Sharing
enhance solder-joint strength for extended temperature n
Differential Remote Sensing for Precision
cycling endurance. Operating over an input voltage range
Regulation (LTM4601A Only)
of 4.5V to 20V, the LTM4601A supports an output voltage n
PLL Frequency Synchronization
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 UltraFast™ Transient Response The low profile and light weight package easily mounts n Current Mode Control on the back side of PC boards. 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 onboard remote sense amplifier is not
APPLICATIONS
available in the LTM4601A-1. n Telecom and Networking Equipment L, LT, LTC, LTM, µModule and PolyPhase are registered trademarks of Linear Technology Corporation. UltraFast and LTpowerCAD are trademarks of Linear Technology Corporation. n Servers All other trademarks are the property of their respective owners. Protected by U.S. Patents including 5481178, 5847554, 6304066, 6476589, 6580258, 6677210, 6774611.
TYPICAL APPLICATION 1.5V/12A Power Supply with 4.5V to 20V Input Efficiency and Power Loss vs Load Current
95 4.0 CLOCK SYNC VIN EFFICIENCY 5V TRACK/SS CONTROL IN 4.5V TO 20V 90 3.5 VIN PLLIN TRACK/SS VOUT 85 PGOOD VOUT 1.5V 12VIN 3.0 POWER LOSS (W) 100pF 12A 80 VFB 2.5 ON/OFF RUN MARG0 MARGIN 75 12V COMP MARG1 CONTROL IN LTM4601A COUT C 70 IN 2.0 INTVCC VOUT_LCL 5VIN DRV EFFICIENCY (%) 65 CC DIFFVOUT 1.5 MPGM V + OSNS 60 V – OSNS R1 POWER LOSS 55 1.0 392k SGND PGND fSET RSET 40.2k 5% MARGIN 50 0.5 0 2 4 6 8 10 12 14 4601A TA01a LOAD CURRENT (A) 4601A TA01b 4601afe For more information www.linear.com/LTM4601A 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 Photos Related Parts