TOREX XC9258B18CMR-G

The XC9257/XC9258 series is a group of synchronous-rectification type DC/DC converters with a built-in P-channel MOS driver transistor and N-channel MOS switching transistor, designed to allow the use of ceramic capacitors. Output voltage is internally set in a range from 0.8V to 3.6V (accuracy: ±2.0%) increments of 0.05V. The device provides a high efficiency, stable power supply with an output current of 1.0A to be configured using only a coil and two capacitors connected externally. Oscillation frequency is set to 1.2MHz or 6.0MHz can be selected for suiting to your particular application. As for operation mode HiSAT-COT () control excellent in transient response, the XC9257 series is PWM control, the XC9258 series is automatic PWM/PFM switching control, allowing fast response, low ripple and high efficiency over the full range of loads (from light load to heavy load). During stand-by, all circuits are shutdown to reduce current consumption to as low as 1.0μA or less. As for the soft-start function as fast as 0.3ms in typical for quick turn-on. With the built-in UVLO (Under Voltage Lock Out) function, the internal P-channel MOS driver transistor is forced OFF when input voltage becomes 2.00V or lower. The B types integrate CL High Speed discharge function which enables the electric charge at the output capacitor CC to be discharged via the internal discharge. Two types of package SOT-25, USP-6C are available. () HiSAT-COT is an original Torex term for High Speed Transient Response.

• Input Voltage Range: 2.5V ~ 5.5V
• Output Voltage Range: 0.8V ~ 3.6V (±2.0%)
• Oscillation Frequency: 1.2MHz, 6.0MHz
• Output Current: 1A
• Control Methods: HiSAT-COT Control, 100% Duty Cycle, PWM Control (XC9257), PWM/PFM Auto (XC9258)
• Protection Circuits: Thermal Shutdown, Current Limit (Pendent character), Short Circuit Protection (Type B), Soft-Start, UVLO, CL High Speed Discharge (Type B)
• Capacitor: Ceramic Capacitor
• Operating Ambient Temperature: -40°C ~ +105°C
• Packages: SOT-25, USP-6C
• Environmentally Friendly: EU RoHS Compliant, Pb Free

• Smart phones / Mobile phones
• Bluetooth
• Portable game consoles
• Digital still cameras / Camcorders
• Point-of-Load (POL)
• Wearable devices