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SM8312 데이터시트(PDF) 3 Page - SamHop Microelectronics Corp. |
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SM8312 데이터시트(HTML) 3 Page - SamHop Microelectronics Corp. |
3 / 11 page SAMHOP Microelectronics Corp. SM8312 150KHz, 2A PWM Buck Switching Regulator 3 V1.0 May 17 ,2007 Absolute Maximum Ratings Symbol Parameter Rating Unit VCC Supply Voltage +45 V VSD ON/OFF Pin input voltage -0.3 to +25 V VFB Feedback Pin voltage -0.3 to +25 V VOUT Output voltage to Ground -1 V PD Power dissipation Internally limited W TST Storage temperature -65 to +150 oC TOP Operating temperature -40 to +125 oC VOP Operating voltage +4.5 to +25 V Electrical Characteristics (All Output Voltage Versions) Unless otherwise specified, VIN=12V for 3.3V, 5V, adjustable version and VIN=24V for the 12V version. ILOAD = 0.2A Symbol Parameter Conditions Min. Typ. Max. Unit -50 IB Feedback bias current VFB=1.3V (Adjustable version only) -10 -100 nA 127 150 173 FOSC oscillator frequency 110 173 Khz Fscp Oscillator frequency of short circuit protect When current limit occurred and VFB <0.55V 30 70 Khz 1.4 VSAT saturation voltage IOUT=2A no outside circuit VFB=0V force driver on 1.25 1.5 V Max. Duty Cycle(ON) VFB=0V force driver on 100 DC Min. Duty cycle(OFF) VFB=12V force driver off 0 % 3.3 ICL current limit peak current no outside circuit VFB=0 force driver on 2.4 2.8 3.6 A Output = 0V no outside circuit VFB=12 force driver off -200 uA IL Output= -1V Output leakage current VIN=24V -5 -30 mA IQ Quiescent Current VFB=12 force driver off 5 10 mA 150 ISTBY Standby Quiescent Current ON/OFF pin=5V VIN=24V 70 200 uA VIL Low (regulator ON) - 0.6 VIH ON/OFF pin logic input threshold voltage High (regulator OFF) 2.0 1.3 - V IH ON/OFF pin logic input current VLOGIC=2.5V (OFF) -0.01 IL ON/OFF pin input current VLOGIC=0.5V (ON) -0.1 -1 uA Tj increasing 175 Ts Over temperature shutdown threshold Tj decreasing 150 oC |
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