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Torex Semiconductor
XC9272 | PFM DC/DC Converter
XC9272 Series
XC9272 series are Ultra Low Power synchronous-rectification type PFM step down DC/DC converters with a built-in 0.4Ω (TYP.) Pch driver and 0.4Ω (TYP.) Nch synchronous switching transistor, designed to allow the use of ceramic capacitor.
Ultra Low Power Synchronous Step-Down PFM DC/DC Converter for Low Output Voltage
PFM control enables a low quiescent current, making these products ideal for battery operated devices that require high efficiency and long battery life.
Only inductor, CIN and CL capacitors are needed as external parts to make a step down DC/DC circuit. Operation voltage range is from 2.0V to 6.0V. This product has fixed output voltage from 0.6V to 0.95V(accuracy: ±20mV) in increments of 0.05V.
During stand-by, all circuits are shutdown to reduce consumption to as low as 0.1μA(TYP.) or less.
With the built-in UVLO (Under Voltage Lock Out) function, the internal P-channel MOS driver transistor is forced OFF when input voltage gets lower than UVLO detection voltage. Besides, XC9272 series has UVLO release voltage of 1.8V (TYP.).
The product with CL discharge function, XC9272B type, can discharge CL capacitor during stand-by mode due to the internal resistance by turning on the internal switch between VOUT -GND. This enables output voltage restored to GND level fast.
Features:
Input Voltage Range: 2.0V～6.0V
Output Voltage Range: 0.6V～0.95V(±20mV,0.05V increments)
Output Current: 50mA
Driver Transistor: 0.4Ω (Pch Driver Tr) / 0.4Ω (Nch Synchronous rectifier Switch Tr)
Quiescent Current: 0.50μA@VOUT(T)=0.7V(TYP.)
Control Methods: PFMControl
High Speed Transient: 50mV(VIN=3.6V,VOUT=0.7V,IOUT=10μA→50mA)
