LTC4125 FuncTional block DiagraM I V IN IN RIS 3V TO 5.5V CTS CTD CIN RIN CIF 4 14 1 IS+ 3 IS– 2 CTS CTD IN VIN IN2 17 A1 EXT OSC CIN2 STARTUP D SW2 18 BG C CTX IMON 5 + A2 VTANK C I IMON RIMON LIMREF – ILIMREF SW DRIVER LTX B VIN SW1 19 VIN DIE TEMP INT OSC A VIN SENSOR VIN IN1 20 RNTC1 C NTC 6 + A3 IN1 TOO HOT RESONANT R – FEEDBACK NTC2 FREQUENCY VIN VIN LOGIC TO VOLTAGE V V IN VIN IN CONVERTER RDTH1 10MΩ A4 – 10MΩ VTANK RFTH1 DTH 7 A/D + FTH DFB 9 RDTH2 PTH1 D/A R V 11 FTH2 IN CFB1 RFB1 FB 13 A/D PULSE WIDTH MODULATOR CFB2 RFB2 10MΩ + A5 PTH2 D/A 10 FBMAXREF – VIN A/D 10MΩ A6 PTHM EN STAT GND 12 15 8 16 RPTHM1 RPTHM2 RSTAT 4125 BD VIN VIN 4125f 8 For more information www.linear.com/LTC4125 Document Outline Features Applications Typical Application Description Absolute Maximum Ratings Order Information Pin Configuration Electrical Characteristics Typical Performance Characteristics Pin Functions Functional Block Diagram Operation Applications Information Typical Applications Package Description Typical Application Related Parts
