30V / 2A Buck DC/DC converter with a built-in driver transistor New Product Leaflet XC9270/XC9271 Series GPS Maesuring Major Navigation machinesiro appliance The XC9270/XC9271 series are high-withstand voltage DC/DC converters with 30V operation, 2A output, and an internal driver Tr. With an input voltage of 30V, input rating of 36V, peak voltage of 46V - 400ms, and an operating ambient temperature range of -40℃ to +105℃, this series is ideal for car accessories and industrial equipment applications. By synchronizing to an external clock, unwanted noise can be reduced. A latch type or auto reset type can be selected for the current limiting function, and a thermal shutdown circuit is also incorporated to enable safer circuit design. SOP-8FD (6.0mm×4.9mm×1.55mm) SALES 1 The frequency can be adjusted using the frequency synchronization function Synchronization function XC9270/XC9271 series has the synchronization function with an external CLK. It can synchronize with the CLK within +/-25% of an internal CLK using SYNC pin. Frequency range for Synchronization 300kHz type : 225kHz ～ 375kHz 500kHz type : 375kHz ～ 625kHz VIN BST CBST CIN L CE Lx SBD Input an external CLK to SYNC pin. The IC frequency varies to match the external CLK frequency. RBF1 CFB1 SS FB CL CSS RBF2 SYNC GND Synchronized waveform for 500kHz type Red line: Lx pin (1V/div) Light blue: SYNC pin (1V/div) CLK: 375kHz ～ 625kHz 625kz 375kz 625kHz 375kHz 625kHz 375kHz Time: 1μs/div Time: 1μs/div Features Input Voltage Range 7.0V～30V Control Method PWM(XC9270), PWM/PFM(XC9271) Load Dump Transients 46V, 400ms (TBD) Adjustable with external cap. (Min. 1.0ms) FB Voltage Operating Ambient Temp. 0.8V±2% -40℃～+105℃ Soft-start Function Ext. Synchronization Protection Circuit Over current protection, Thermal shutdown Package ±25% of the oscillationfrequency Quiescent Current 200μA (300kHz) Automatic recovery (Type B) Oscillation Frequency 300kHz, 500kHz (±8%) Max. Output Current 2.0A Integral latch method (Type A) SOP-8FD www.torex.co.jp/english March 2014 ● Values shown in this sheet can be changed without any prior notice. New Product Leaflet 30V/2A Buck DC/DC converter with a built-in driver transistor XC9270/XC9271 Series SALES The internal driver Tr. contributes to space saving 2 TOREX Synchronous Controller Complex XC9270/XC9271 Simple VIN GND CE BST CIN CBST L SS Lx SBD CSS CFB SYNC RFB1 FB CL RFB2 Small Space 28mm 44mm XC9270/XC9271 31mm 44mm ◆The driver Tr. is incorporated to reduce peripheral components and decrease mounting space! ◆SBD is used for the rectifier circuit, also it can dissipate the heat outside of IC. ◆PKG is SOP-8FD SALES High efficiency even at light loads 3 Efficiency (PFM/PWM Auto Control vs. PWM Control) f=500kHz, VIN=12V, VOUT=5.0V, IOUT=2.0A PFM/PWM Auto Control Effic ienc y : EF F I (% ) 100 90 80 High Efficiency at Light Load 70 60 PFM control can be selected 50 40 PWM Control The stand-by power consumption of a system can be improved. 30 20 10 0 1 10 100 1000 10000 Output Current : IOUT (mA ) www.torex.co.jp/english March 2014 ● Values shown in this sheet can be changed without any prior notice.