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产品名称: DC/DC转换器和控制器
产品型号: XC9242~XC9243
产品展商: TOREX
会员价格: 0.00 元
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DC/DC转换器和控制器 The XC9242/XC9243 series is a group of synchronous-rectification step-down DC/DC converters with a built-in 0.11Ω(TYP.)

DC/DC转换器和控制器  的详细介绍




The XC9242/XC9243 series is a group of synchronous-rectification step-down DC/DC converters with a built-in 0.11Ω(TYP.) P-channel MOS driver transistor and 0.12Ω(TYP.) N-channel MOS switching transistor, designed to allow the use of ceramic capacitors. The small on-resistances of these two internal driver transistors enable a high efficiency, stable power supply with an output current up to 2A. The XC9242/XC9243 series has operating voltage range of 2.7V~6.0V and a 0.8V (±2.0%) reference voltage, and using externally connected resistors, the output voltage can be set freely from 0.9V. With an internal switching frequency of 1.2MHz or 2.4MHz, small external components can be used. , The XC9242 series is PWM control, and the XC9243 series is PWM/PFM, which automatically switches from PWM to PFM during light loads and provides high efficiency, high load response, low voltage ripple, can be achieved over a wide range of load conditions. The series have a high speed soft-start as fast as 1ms in typical for quick turn-on. It’s suitable for large-current application due to limit current is configured 4.0A in typical. During stand-by, all circuits are shutdown to reduce current consumption to as low as 1.0μA or less. The integrated CL discharge function which enables the electric charge at the output capacitor CL to be discharged via the internal discharge switch located between the LX and VSS pins. Due to CL discharge function, malfunction on LX is prevented when Stand-by mode. With the built-in UVLO (Under Voltage Lock Out) function, the internal P-channel driver transistor is forced OFF when input voltage becomes 2.5V or lower.



Driver Transistor 0.11Ω(TYP.)P-ch Driver Transistor,0.12Ω(TYP.)N-ch Switching Transistor
Input Voltage Range 2.7V~6.0V
Output Voltage Setting 0.9V~VIN
FBVoltage 0.8V±2.0%
High Efficiency 95%(TYP.)
Output Current 2.0A
Oscillation Frequency 1.2MHz±15%,2.4MHz±15%
Maximum Duty Cycle 100%
Functions Soft-Start Circuit Built-In,CL Discharge,Current Limit Circuit(automatic return),Thermal Shutdown,UVLO
Output Capacitor Low ESR Ceramic Capacitor
Control Methods PWM control (XC9242),PWM/PFM Auto (XC9243)
Operating Ambient Temperature -40℃ ~ +85℃
Package USP-10B, SOP-8FD
Environmentally Friendly EU RoHS Compliant, Pb Free
* Four samples are available.,XC9242B08CDR-G (1.2MHz Fixed PWM),XC9242B08DDR-G (2.4MHz Fixed PWM),XC9243B08CDR-G (1.2MHz Auto Switching PWM/PFM),XC9243B08DDR-G (2.4MHz Auto Switching PWM/PFM)
* Evaluation board can be provided in your conditions., Please consult us by clicking the top button of "TECHNICAL CONSULTATION", with filling out the usage conditions belo