Datasheet LTM4650A-1 (Analog Devices) - 10

LTM4650A-1
SIMPLIFIED BLOCK DIAGRAM
PGOOD1 VIN TRACK1 V 4.5V TO 16V IN SS CAP C C 0.1µF IN1 IN2 22µF 22µF 25V 25V GND V R IN T TEMP = 100µA VIN MTOP1 RT CLKOUT SW1 OR TEMP MONITORS RUN1 0.22µH V VOUT1 OUT1 1.5V MODE_PLLIN + 25A MBOT1 0.22µF COUT1 PHASEMD GND VOUTS1 COMP1 60.4k VFB1 RTH1 CTHP1 10pF RFB1 CTH1 40.2k SGND POWER CONTROL PGOOD2 TRACK2 VIN INTVCC C C SS CAP 0.1µF IN3 IN4 4.7µF 22µF 22µF GND 25V 25V EXTVCC MTOP2 SW2 0.22µH V V OUT2 OUT2 3.3V RUN2 + 25A MBOT2 0.22µF COUT2 GND VOUTS2 60.4k COMP2 + V – FB2 RFB2 CTHP2 10pF 13.3k RTH2 fSET CTH2 INTERNAL RFSET FILTER SGND DIFFOUT DIFFN DIFFP 4650a1 BD
Figure 1. Simplified LTM4650A-1 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 16V, VOUT1 = 1.2V) IOUT1 = 25A 22 66 µF CIN3, CIN4 (VIN2 = 4.5V to 16V, VOUT2 = 3.3V) IOUT2 = 25A 22 66 µF External Output Capacitor Requirement COUT1 (VIN1 = 4.5V to 16V, VOUT1 = 1.2V) IOUT1 = 25A 300 600 µF COUT2 (VIN2 = 4.5V to 16V, VOUT2 = 3.3V) IOUT2 = 25A 300 600 µF 4650a1f 10 For more information www.linear.com/LTM4650A-1 Document Outline Features Applications Typical Application Description Absolute Maximum Ratings Order Information Electrical Characteristics Pin Configuration Typical Performance Characteristics Pin Functions Simplified Block Diagram Decoupling Requirements Operation Applications Information Typical Applications Package Description Typical Application Package Photo Design Resources Related Parts