Datasheet LTM4650 (Analog Devices) - 10

link to page 10 LTM4650
SIMPLIFIED BLOCK DIAGRAM
PGOOD1 VIN TRACK1 V 4.5V TO 15V IN SS CAP CIN1 1μF 22µF 25V GND ×3 V R IN T TEMP = 100µA VIN MTOP1 RT CLKOUT SW1 OR TEMP MONITORS RUN1 0.12µH V VOUT1 OUT1 1.5V MODE_PLLIN + 25A MBOT1 0.22µF COUT1 PHASEMD GND VOUTS1 COMP1 60.4k VFB1 INTERNAL RFB1 COMP 40.2k SGND POWER CONTROL PGOOD2 TRACK2 VIN INTVCC C SS CAP 1μF IN2 4.7µF 22µF 0.22µF GND 25V ×3 EXTVCC MTOP2 SW2 0.12µH V V OUT2 OUT2 1.2V RUN2 + 25A MBOT2 0.22µF COUT2 GND VOUTS2 60.4k COMP2 + V – FB2 RFB2 INTERNAL 60.4k COMP fSET R INTERNAL FSET FILTER SGND DIFFOUT DIFFN DIFFP 4650 F01
Figure 1. Simplified LTM4650 Block Diagram DECOUPLING REQUIREMENTS TA = 25°C. Use Figure 1 configuration. SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
External Input Capacitor Requirement CIN1, CIN2 (VIN1 = 4.5V to 15V, VOUT1 = 1.5V) IOUT1 = 25A 44 66 µF (VIN2 = 4.5V to 15V, VOUT2 = 1.0V) IOUT2 = 25A 44 66 µF External Output Capacitor Requirement COUT1 (VIN1 = 4.5V to 15V, VOUT1 = 1.5V) IOUT1 = 25A 600 800 µF COUT2 (VIN2 = 4.5V to 15V, VOUT2 = 1.0V) IOUT2 = 25A 600 800 µF Rev. C 10 For more information www.analog.com Document Outline Description Typical Application Absolute Maximum Ratings Pin Configuration Electrical Characteristics Typical Performance Characteristics Pin Functions Operation Applications Information Related Parts Features Applications Typical Application Description Absolute Maximum Ratings Order Information Pin Configuration Electrical Characteristics Typical Performance Characteristics Pin Functions Simplified Block Diagram Decoupling Requirements Operation Applications Information Typical Applications Package Description Revision History Package Photo Design Resources Related Parts