Torex XC9273

Description

The XC9273 series is a group of synchronous-rectification type DC/DC converters with a built-in 47mΩ P-channel MOS drivertransistor and 36mΩ N-channel MOS switching transistor, designed to allow the use of ceramic capacitors. The small on-resistancesof these two internal driver transistors enable a high efficiency, stable power supply with an output current up to 3.0A. A 0.6Vreference voltage source is incorporated, and the output voltage can be set freely by external resistors. Oscillation frequency is setto 1.2MHz or 3.0MHz can be selected for suiting to your particular application. The operation mode is HISAT-COT (*) control, whichhas an excellent transient response. PWM control or PWM/PFM auto switching control can be selected at the MODE1 pin, and ahigh-speed response, low ripple, and high efficiency are achieved across the entire load range (from light loads to heavy loads).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 asfast as 0.25ms in typical for quick turn-on. The soft start time can be set as desired by adding an external capacitance to the SSpin. Internal protection circuits include over current protection, short-circuit protection, and thermal shutdown circuits to enable safeuse. Short circuit protection or Hiccup mode can be selected at the MODE2 pin.Soft-off function and CL High Speed discharge function discharge the electric charge at the output capacitor CL when putting the ICin a stand-by mode. Soft-off function can be selected at the MODE3 pin. The package is the QFN0404-24C (4mm×4mm).

Features

Input Voltage Range : 2.7V～5.5VOutput Voltage Range : 0.8V～3.6VFB Voltage : 0.6V±1.0%Output Current : 3.0AOscillation Frequency : 1.2MHz, 3.0MHzEfficiency : 95%(VIN=5.0V, VOUT=3.3V, IOUT=1.0A)Control Methods : HiSAT-COT Control100% Duty CycleMode select betweenFixed PWM and PWM/PFM AutoProtection Circuits : Thermal ShutdownCurrent Limit (Pendent character)HICCUP or Short Circuit ProtectionFunctions :UVLO , Soft-Start, Soft-offCL High Speed DischargeCapacitor :Ceramic CapacitorOperating Ambient Temperature : - 40℃ ～ + 105℃Package :QFN0404-24CEnvironmentally Friendly : EU RoHS Compliant, Pb Free

Typical applications

• Industrial application
• PC, Graphic board, Storage, FPGA, SSD, ASIC, DSP

More information

• Datasheet
• IC product information