Datasheet LTM4618 (Analog Devices)

LTM4618 6A DC/DC µModule Regulator with Tracking and Frequency Synchronization
FeaTures DescripTion
n
Complete Standalone Power Supply
The LTM®4618 is a complete 6A output switch mode n
Wide Input Voltage Range: 4.5V to 26.5V
DC/DC power supply. Included in the package are the n
6A DC Typical, 8A Peak Output Current
switching controller, power FETs, inductor and all support n
0.8V to 5V Output
components. Operating over an input voltage range of n
Output Voltage Tracking
4.5V to 26.5V, the LTM4618 supports an output voltage n
±1.75% Maximum Total DC Error
range of 0.8V to 5V set by a single external resistor. Its n
Current Mode Control/Fast Transient Response
high efficiency design delivers 6A continuous current (8A n
Phase-Lockable Fixed Frequency 250kHz to 780kHz
peak). Only a few input and output capacitors are needed. n
On-Board Frequency Synchronization
High switching frequency and a current mode architecture n
Selectable Burst Mode
®
Operation
enable a very fast transient response to line and load n Power Good Voltage Indicator changes without sacrificing stability. The device supports n Output Overvoltage Protection frequency synchronization and output voltage tracking for n Output Current Foldback Limiting supply rail sequencing. Burst Mode operation or pulse- n 9mm × 15mm × 4.32mm LGA and skipping mode can be selected for light load conditions. 9mm × 15mm × 4.92mm BGA Packages Fault protection features include overvoltage protection, overcurrent protection and foldback current limit for
applicaTions
short-circuit protection. n Telecom and Networking Equipment The LTM4618 is offered in 9mm × 15mm × 4.32mm LGA n Servers and 9mm × 15mm × 4.92mm BGA packages with RoHS n Storage Cards compliant terminal finish. n ATCA Cards L, LT, LTC, LTM, Linear Technology, the Linear logo, Burst Mode and µModule are registered n Industrial Equipment trademarks and LTpowerCAD is a trademark of Linear Technology Corporation. All other trademarks are the property of their respective owners. n Point of Load Regulation n Medical Systems
Typical applicaTion 2.5V/6A DC/DC Power µModule
®
with 6V to 26.5V Input Efficiency and Power Loss vs Load Current
95 3.0 EFFICIENCY 2.5 90 MODE/PLLIN INTV POWER LOSS (W) CC EXTVCC VIN 2.0 V 6V to 26.5V IN FREQ 85 CIN COMP V V OUT OUT 2.5V/6A 1.5 LTM4618 TK/SS V C FB OUT 80 0.1µF EFFICIENCY (%) RUN PGOOD 28k 1.0 SGND PGND POWER LOSS 75 4618 TA01 0.5 12VIN TO 2.5VOUT 24VIN TO 2.5VOUT 70 0 0 1 2 3 4 5 6 LOAD CURRENT (A) 4618 TA01b 4618fb For more information www.linear.com/LTM4618 1 Document Outline Features Description Applications 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 Photograph Package Description Revision History Typical Application Related Parts