LTM4668 Quad DC/DC Module Regulator with Configurable 1.2A Output Array FEATURES DESCRIPTION n Quad Output Step-Down Module Regulator with The LTM 4668 is a quad DC/DC step-down Module 1.2A per Output Channel (micromodule) regulator with 1.2A DC current per out- n Wide Input Voltage Range: 2.7V to 17V put. Outputs can be paralleled in an array for up to 4.8A n 0.6V to 1.8V Output Voltage capability. Included in the package are the switching n 1.2A DC, Parallelable, Output Current Each Channel controllers, power FETs, inductors and support compo- n 1.5% Total Output Voltage Regulation nents. Operating over an input voltage range of 2.7V to n 100% Duty-Cycle Operation 17V, the LTM4668 supports an output voltage range of n Current Mode Control, Fast Transient Response 0.6V to 1.8V. Only bulk input and output capacitors are n External Frequency Synchronization needed. The device supports frequency synchronization, n Selectable Burst Mode Operation poly-phase operation, selectable Burst Mode operation, n Power Good Indicator 100% duty cycle and low I operation. Its high switching Q n Over Voltage, Current and Temperature Protection frequency and a current mode architecture enables a very n 6.25mm 6.25mm 2.1mm BGA Package fast transient response to line and load changes without n Pin Compatible with LTM4668A (0.6V to 5.5V sacrificing stability. Output, 2.25MHz). Fault protection features include overvoltage, overcurrent and overtemperature protection. The power module is APPLICATIONS offered in a space saving and thermally enhanced 6.25mm 6.25mm 2.1mm BGA package. The LTM4668 is avail- n Telecom, Networking and Industrial Equipment able with RoHS compliant terminalfinish. n Multi-Rail Point of Load Regulation n Configurable Output Array FPGAs, DSPs and ASICs Application 1.2A All registered trademarks and trademarks are the property of their respective owners. 2.4A 1.2A 3.6A 4.8A 1.2A 1.2A 1.2A 1.2A 1.2A TYPICAL APPLICATION 2.7V to 17V Input, Quad 1.0V, 1.2V, 1.5V, 1.8V Output DC/DC Module Regulator 1.5V Output Efficiency (Each Channel) 100 2.7V V V 1.0V/1.2A IN OUT1 to 17V 95 22F V FB1 47F 2 6.3V 90 PGOOD1 90.9k 25V LTM4668 85 RUN1 V 1.2V/1.2A OUT2 80 RUN2 V FB2 47F 6.3V 75 RUN3 PGOOD2 60.4k RUN4 70 V OUT3 1.5V/1.2A 65 V FB3 47F 60 PGOOD3 6.3V 40.2k 5V IN 55 12V IN INTV V 1.8V/1.2A CC OUT4 50 MODE/SYNC V FB4 0 0.2 0.4 0.6 0.8 1.0 1.2 47F GND PGOOD4 30.1k 6.3V LOAD CURRENT (A) 4668 TA01b 4668 TA01a Rev. B 1 Document Feedback For more information www.analog.com EFFICIENCY (%)LTM4668 ABSOLUTE MAXIMUM RATINGS PIN CONFIGURATION (Note 1) FB2 PGOOD3 V ............................................................. 0.3V to 17V FB3 IN V OUT2 V 7 OUT3 V (per Channel) ...................................... 0.3V to 6V OUT PGOOD2 GND RUN (per Channel) ..................................... 0.3V to 17V 6 GND INTV (Note 3) ........................................... 0.3V to 6V RUN2 RUN3 CC 5 PGOOD (per Channel) .................................. 0.3V to 6V MODE/SYNC V IN FB (per Channel) ...................................0.3V to INTV 4 V CC IN INTV RUN4 CC MODE/SYNC ................................0.3V to INTV +0.3V CC 3 Operating Junction Temperature (Note 2) .. 40 to 125C RUN1 PGOOD1 2 Storage Temperature Range ...................... 55 to 125C PGOOD4 Peak Solder Reflow Body Temperature .................260C 1 V OUT4 V OUT1 FB4 FB1 A B C D E F G BGA PACKAGE 49-LEAD (6.25mm 6.25mm 2.1mm) T = 125C, = 30.5C/W, JMAX JCtop = 7.4C/W, =29.3C/W JCbottom JA WEIGHT=0.7g VALUES DETERMINED PER JESD51-12 ORDER INFORMATION PART MARKING* PACKAGE MSL TEMPERATURE RANGE PART NUMBER PAD OR BALL FINISH DEVICE FINISH CODE TYPE RATING (SEE NOTE 2) LTM4668EY PBF LTM4668Y SAC305 (RoHS) e1 BGA 4 40C to 125C LTM4668IY PBF LTM4668Y Device temperature grade is indicated by a label on the shipping container. This product is not recommended for second side reflow. This product is moisture sensitive. For more information, go Pad or ball finish code is per IPC/JEDEC J-STD-609. to Recommended BGA PCB Assembly and Manufacturing BGA Package and Tray Drawings Procedures. ELECTRICAL CHARACTERISTICS The l denotes the specifications which apply over the specified internal operating temperature range, otherwise specifications are at T = 25C. V =12V, per the typical application. A IN SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS Switching Regulator Section: (Per Channel) l V Input DC Voltage 2.7 17 V IN V Output Voltage Range V = 2.7V to 17V (Step-Down Only) l 0.6 1.8 V OUT(RANGE) IN l V Output Voltage, Total Variation with C = 10F, C = 47F Ceramic 1.477 1.50 1.523 V OUT(DC) IN OUT Line and Load R = 40.2k, MODE = INTV /2 FB CC V = 2.7V to 17V, I = 0A to 1.2A IN OUT V RUN Pin On Threshold V Rising 0.35 0.7 1 V RUN RUN I Input Supply Bias Current V = 12V, V = 1.5V, MODE = INTV /2 (CCM) 50 mA Q(VIN) IN OUT CC V = 12V, V = 1.5V, MODE = INTV (Burst) 300 A IN OUT CC V = 12V, V = 1.5V, MODE = GND (PS) 200 A IN OUT Shutdown, RUN = 0, V = 12V 1 A IN I Input Supply Current V = 12V, V = 1.5V, I = 1.2A 0.2 A S(VIN) IN OUT OUT Rev. B 2 For more information www.analog.com