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SC1401 데이터시트(PDF) 3 Page - Semtech Corporation |
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SC1401 데이터시트(HTML) 3 Page - Semtech Corporation |
3 / 17 page SC1401 © 2000 SEMTECH CORP. 652 MITCHELL ROAD NEWBURY PARK CA 91320 HIGH PERFORMANCE SYNCHRONOUS BUCK CONTROLLER WITH LDO FOR PORTABLE POWER November 21, 2000 3 ABSOLUTE MAXIMUM RATINGS PARAMETER MAXIMUM UNITS VDD1 to GND -0.3 to +36 V PGND to GND - 0.3 to 0.3 V V5V, FB, CSH, CSL, IOS to GND -0.3 to +6 V SYNC, SHDN, PSAVE, ENABLEIO to GND -0.3 to +6 V BST to GND -0.3 to +36 V BST to PHASE -0.3 to 6 V VDD2 to GND -0.3 to +36 V GATEIO to GND 9 V Junction operating temperature (TJ) -40 to +125 °C Thermal resistance junction to ambient ( θJA) 50 °C/W Storage temperature -65 to +150 °C Lead soldering temperature +300, 10 seconds °C ELECTRICAL CHARACTERISTICS Unless specified: VDD1 = 12V, VDD2 = 12V V5V = 5V, SHDN = PSAVE = 5V, TA = -40 °C to +85 °C . Typical values are at TA = +25°C. PARAMETER CONDITIONS MIN TYP MAX UNITS SMPS CONTROLLER VDD1 Input Voltage Range 6.0 30.0 V VOUT SMPS VREF 5.5 V Internal BandGap Voltage, VREF Measured at the Feedback pin 1.225 1.250 1.275 V Load Regulation 0mV < CSH - CSL < 100mV 2 % Line Regulation 6V < VDD1 < 30V 0.03 %/V Overcurrent-Limit Threshold CSH - CSL 100 130 160 mV PSAVE Mode Threshold CSH - CSL, PSAVE = 0 V 30 mV Soft-Start Ramp Time From enable to 95% full current limit with respect to fOSC 512 clks Oscillator Frequency SYNC = V5V SYNC = 0V 265 165 300 200 335 235 kHz Maximum Duty Factor 85 90 87 93 % SYNC = V5V SYNC = 0V Note 1: This device is ESD sensitive. Use of standard ESD handling precautions is required. |
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