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UC3551 Folha de dados(PDF) 4 Page - Unisonic Technologies |
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UC3551 Folha de dados(HTML) 4 Page - Unisonic Technologies |
4 / 6 page UC3551 Preliminary CMOS IC UNISONICTECHNOLOGIESCO.,LTD 4 of 6 www.unisonic.com.tw QW-R502-555.a ABSOLUTE MAXIMUM RATING PARAMETER SYMBOL RATINGS UNIT Supply Voltage VIN − 0.3 ~ 7 V LX Pin Switch Voltage VLX − 0.3 ~ (VDD + 0.8) V Other I/O Pin Voltages − 0.3 ~ (VDD + 0.3) V LX Pin Switch Current ILX 2.5 A EXT Pin Driver Current IEXT 200 mA Operating Junction Temperature TOPR 125 °C Storage Temperature TSTG -65~+150 °C Notes: Absolute maximum ratings are those values beyond which the device could be permanently damaged. Absolute maximum ratings are stress ratings only and functional device operation is not implied. THERMAL DATA PARAMETER SYMBOL RATINGS UNIT Junction to Case θJC 145 °C/W ELECTRICAL CHARACTERISTICS (TA = 25°C,VIN = 1.5V, VDD= 3.3V, Load Current = 0, unless otherwise specified) PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNIT Start-UP Voltage VST IL = 1mA 0.98 1.05 V Operating VDD Range VDD VDD pin voltage 2 6.5 (Note ) V No Load Current I (VIN) INO LOAD VIN = 1.5V, VOUT = 3.3V 75 μA Switch-off Current I (VDD) ISWITCH OFF VIN = 6V 17 μA Shutdown Current I (VIN) IOFF CE Pin = 0V, VIN = 4.5V 0.01 1 μA Feedback Reference Voltage VREF Close Loop, VDD = 3.3V 1.225 1.25 1.275 V Switching Frequency FS VDD = 3.3V 450 KHz Maximum Duty DMAX VDD = 3.3V 95 % LX ON Resistance VDD = 3.3V 0.3 Ω Current Limit Setting ILIMIT VDD = 3.3V 2 A EXT ON Resistance to VDD VDD = 3.3V 5 Ω EXT ON Resistance to GND VDD = 3.3V 5 Ω Line Regulation ∆VLINE VIN = 1.5 ~ 2.5V, IL = 1mA 10 mV/V Load Regulation ∆VLOAD VIN = 2.5V, IL = 1 ~ 100mA 0.25 mV/mA CE Pin Trip Level VDD = 3.3V 0.4 0.8 1.2 V Temperature Stability for Vout Ts 50 ppm/°C Thermal Shutdown TSD 165 °C Thermal Shutdown Hysterises ∆TSD 10 °C Note: The CE pin shall be tied to VDD pin and inhibit to act the ON/OFF state whenever the VDD pin voltage may reach to 5.5V or above. |
Nº de peça semelhante - UC3551_15 |
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Descrição semelhante - UC3551_15 |
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