45V Input Buck Converter 3ch/2ch IC with Power MOSFET Ｑｕaｌｉｔｙ is our message Features Features FA7726/7730 BrockDiagram Diagramand andapplication applicationexample example 33ch-IC ch-IC Brock RT OSC V REG5 REG 3 3V V REG3 REG 5 5V V in = 10 to 45V VCC V R EF FB1 PW M Com p.1 PVCC1 IN2- E.A.2 VIN2 Current Lim it FB2 PW M Comp.2 Current Limit 1V FB3 IN3- E.A.3 VIN3 PW M Comp.3 1V P Dead Time 1V OUT1 N PVCC2 P OUT2 PVCC3 Current Limit P OUT3 N Item UVLO_ H S Q ch3 ch2 Current Lim it ch3 UVLO_ L BriefSpecification Specification Brief VIN3 pin UVLO ch2 UVLO VO3(1.5V/1.2A） PGND3 ch1 CS3 VIN2 pin * ch1 Soft Start VIN1 pin VO2(3.3V/1.2A) PG ND2 N UVLO CS1 CS2 VO1(5V/1.2A) PGND1 UVLO Dead Time E.A.1 VIN1 Dead Time IN1- 1. Wide Input Voltage Range : 10 to 45V 2. 75 to 85% High Efficiency is achieved by using internal power MOSFETs with synchronized rectifier. 3. Low Operating Current : 3.5mA 4. Protection : Current Limit of power MOSFET, Each channel soft start, Timer Latched Protection for Short Current and Over Temperature Input Voltage Range FB Detection SCP CP DC Output R OTP(OHP) OHP Voltage / Current Switching Frequency G ND Junction Temperature Characteristics 3ch FA7726F 2ch FA7730F 10 to 45V 5.0V,1.5V Selectable 5.0V/1.2A 1.2A Output 3.3V/1.2A 1.5V/1.2A 3.3V/1.2A 40k to 200kHz -20 to 150 degree 45V Input Buck Converter 3ch/2ch IC with Power MOSFET Ｑｕaｌｉｔｙ is our message FA7726/7730 DC-to-DC ConverterData Data DC -to-DC Converter DC/DC 3 Outputs Condition 5V/1.2A 1.5V/0.8A 3.3V/0.8A FA7726 Efficiency Input Voltage vs. Efficiency 90 fosc=40kHz fosc=60kHz fosc=80kHz 85 fosc=100kHz fosc=120kHz Efficiency [%] 80 fosc=140kHz fosc=160kHz fosc=180kHz 75 fosc=200kHz 70 65 60 5 10 15 20 25 30 35 DC input voltage [V] 40 45 50 55