Datasheet XC9267 (Torex)
| Manufacturer | Torex |
| Description | 36V Operation 0.6A Synchronous Step-Down DC/DC Converters |
| Pages / Page | 30 / 1 — XC9267 Series |
| File Format / Size | PDF / 1.7 Mb |
| Document Language | English |
XC9267 Series
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XC9267 Series
ETR05054-002 3 6V Operation 600mA Synchronous Step-Down DC/DC Converters ■GENERAL DESCRIPTION The XC9267 series are 36V operation synchronous step-down DC/DC converter ICs with a built-in P-channel MOS driver transistor and N-channel MOS switching transistor. The XC9267 series has operating voltage range of 3.0V~36.0V and high-efficiency power supply up to an output current of 600mA. Low ESR capacitors such as ceramic capacitors can be used for the load capacitor (CL). A 0.75V reference voltage source is incorporated in the IC, and the output voltage can be set to a value from 1.0V to 25.0V using external resistors (R FB1, RFB2). 1.2MHz or 2.2MHz can be selected for the switching frequency. The soft-start time is internally set to 2.0ms (TYP.), but can be adjusted to set a longer time using an external resistor and capacitor. With the built-in UVLO function, the driver transistor is forced OFF when input voltage becomes 2.7V or lower. The output state can be monitored using the power good function. Internal protection circuits include over current protection and thermal shutdown circuits to enable safe use. ■APPLICATIONS ■FEATURES ● Input Voltage Range : 3.0 ~ 36V (Absolute Max 40V) Electric Meter Output Voltage Range 1.0 ~ 25V ● Gas Detector FB Voltage : 0.75V±1.5% ● Various Sensor Oscillation Frequency : 1.2MHz, 2.2MHz ● Industrial Equipment Output Current : 600mA ● Home appliance Control Methods : PWM control Efficiency88%@12V→5V, 300mA Soft-start Time : Adjustable by RC Protection Circuits : Over Current Protection : Thermal Shutdown Output Capacitor : Ceramic Capacitor Operating Ambient Temperature : - 40℃ ~ + 105℃ Packages : SOT-89-5 (Without Power Good) : USP-6C (With Power Good) Environmentally Friendly EU RoHS Compliant, Pb Free ■TYPICAL APPLICATION CIRCUIT ■TYPICAL PERFORMANCE CHARACTERISTICS XC9267B75Cxx (V =12V, V =5V, f =1.2MHz) IN OUT OSC L L=6.8μH(CLF5030NIT-6R8), C V IN=4.7μF×2(C2012X6S1H475K) IN Lx CL=10μF×2 (C3216X7R1E106K) CIN R 2.2μF FB1 100 CFB 90 EN/SS FB ] 80 CL R I[% FB2 70 10μF×2 F RPG F 60 GN D PG y :E 50 c n 40 ie 30 ffic E 20 10 0 0.1 1 10 100 1000 Output Current :I [mA] OUT 1/30
ETR05054-002 3 6V Operation 600mA Synchronous Step-Down DC/DC Converters ■GENERAL DESCRIPTION The XC9267 series are 36V operation synchronous step-down DC/DC converter ICs with a built-in P-channel MOS driver transistor and N-channel MOS switching transistor. The XC9267 series has operating voltage range of 3.0V~36.0V and high-efficiency power supply up to an output current of 600mA. Low ESR capacitors such as ceramic capacitors can be used for the load capacitor (CL). A 0.75V reference voltage source is incorporated in the IC, and the output voltage can be set to a value from 1.0V to 25.0V using external resistors (R FB1, RFB2). 1.2MHz or 2.2MHz can be selected for the switching frequency. The soft-start time is internally set to 2.0ms (TYP.), but can be adjusted to set a longer time using an external resistor and capacitor. With the built-in UVLO function, the driver transistor is forced OFF when input voltage becomes 2.7V or lower. The output state can be monitored using the power good function. Internal protection circuits include over current protection and thermal shutdown circuits to enable safe use. ■APPLICATIONS ■FEATURES ● Input Voltage Range : 3.0 ~ 36V (Absolute Max 40V) Electric Meter Output Voltage Range 1.0 ~ 25V ● Gas Detector FB Voltage : 0.75V±1.5% ● Various Sensor Oscillation Frequency : 1.2MHz, 2.2MHz ● Industrial Equipment Output Current : 600mA ● Home appliance Control Methods : PWM control Efficiency88%@12V→5V, 300mA Soft-start Time : Adjustable by RC Protection Circuits : Over Current Protection : Thermal Shutdown Output Capacitor : Ceramic Capacitor Operating Ambient Temperature : - 40℃ ~ + 105℃ Packages : SOT-89-5 (Without Power Good) : USP-6C (With Power Good) Environmentally Friendly EU RoHS Compliant, Pb Free ■TYPICAL APPLICATION CIRCUIT ■TYPICAL PERFORMANCE CHARACTERISTICS XC9267B75Cxx (V =12V, V =5V, f =1.2MHz) IN OUT OSC L L=6.8μH(CLF5030NIT-6R8), C V IN=4.7μF×2(C2012X6S1H475K) IN Lx CL=10μF×2 (C3216X7R1E106K) CIN R 2.2μF FB1 100 CFB 90 EN/SS FB ] 80 CL R I[% FB2 70 10μF×2 F RPG F 60 GN D PG y :E 50 c n 40 ie 30 ffic E 20 10 0 0.1 1 10 100 1000 Output Current :I [mA] OUT 1/30
