Datasheet LTM4630 (Analog Devices)

LTM4630 Dual 18A or Single 36A DC/DC µModule Regulator
FEATURES DESCRIPTION
n
Dual 18A or Single 36A Output
The LTM®4630 is a dual 18A or single 36A output switching n
Wide Input Voltage Range: 4.5V to 15V
mode step-down DC/DC µModule® (micromodule) regula- n
Output Voltage Range: 0.6V to 1.8V
tor. Included in the package are the switching controllers, n
±1.5% Maximum Total DC Output Error Over Line,
power FETs, inductors, and all supporting components.
Load and Temperature
Operating from an input voltage range of 4.5V to 15V, the n
Differential Remote Sense Amplifier
LTM4630 supports two outputs each with an output voltage n
Current Mode Control/Fast Transient Response
range of 0.6V to 1.8V, each set by a single external resistor. n
Adjustable Switching Frequency
Its high efficiency design delivers up to 18A continuous n
Overcurrent Foldback Protection
current for each output. Only a few input and output ca- n
Multiphase Parallel Current Sharing with Multiple
pacitors are needed. The LTM4630 is pin compatible with
LTM4630s Up to 144A
the LTM4620 and LTM4620A (dual 13A, single 26A) and n
Frequency Synchronization
the LTM4628 (dual 8A, single 16A). n
Internal Temperature Monitor
The device supports frequency synchronization, multi- n Pin Compatible with the LTM4620 and LTM4620A (Dual phase operation, Burst Mode operation and output voltage 13A, Single 26A) and LTM4628 (Dual 8A, Single 16A) tracking for supply rail sequencing and has an onboard n Selectable Burst Mode® Operation temperature diode for device temperature monitoring. High n Soft-Start/Voltage Tracking switching frequency and a current mode architecture enable n Output Overvoltage Protection a very fast transient response to line and load changes n 16mm × 16mm × 4.41mm LGA and 16mm × 16mm × without sacrificing stability. 5.01mm BGA Packages Fault protection features include overvoltage and
APPLICATIONS
overcurrent protection. The LTM4630 is offered in 16mm n × 16mm × 4.41mm LGA and 16mm × 16mm × 5.01mm Telecom and Networking Equipment n BGA packages. The LTM4630 is ROHS compliant. Storage and ATCA Cards n Industrial Equipment L, LT, LTC, LTM, Linear Technology, the Linear logo, µModule, Burst Mode and PolyPhase are registered trademarks of Linear Technology Corporation. All other trademarks are the property of their respective owners. Protected by U.S. Patents, including 5481178, 5705919, 5929620, 6100678, 6144194, 6177787, 6304066 and 6580258. Other patents pending.
TYPICAL APPLICATION 36A, 1.2V Output DC/DC µModule Regulator
INTVCC
1.2V
4.7µF 10k
OUT Efficiency vs IOUT
PGOOD 95 MODE_PLLIN CLKOUT INTVCC EXTVCC PGOOD1 V V IN = 5V IN VIN VOUT1 4.5V TO 15V 90 22µF + 10k 25V 120k TEMP V 100µF 470µF OUTS1 6.3V 6.3V ×4 RUN1 DIFFOUT 85 VIN = 12V RUN2 SW1 TRACK1 V 80 LTM4630 FB1 5.1V TRACK2 VFB2 60.4k EFFICIENCY (%) 75 0.1µF fSET COMP1 PHASMD COMP2 70 VOUTS2 VOUT 121k VOUT2 + 1.2V 65 SW2 100µF 470µF 36A 0 2 4 6 8 10 12 14 16 18 6.3V PGOOD2 6.3V OUTPUT CURRENT (A) SGND GND DIFFP DIFFN PGOOD 4630 TA01b 4630 TA01a 4630fa For more information www.linear.com/LTM4630 1 Document Outline Description Typical Application Absolute Maximum Ratings Pin Configuration Electrical Characteristics Typical Performance Characteristics Pin Functions Operation Applications Information Package Description Related Parts