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SP6138 Datasheet(PDF) 3 Page - Sipex Corporation |
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SP6138 Datasheet(HTML) 3 Page - Sipex Corporation |
3 / 17 page 3 Oct 24-06 Rev J SP638 Synchronous Buck Controller © 2006 Sipex Corporation ELECTRICAL SPECIFICATIONS Unless otherwise specified: -40°C < TAMB < +85°C, 4.5V < VCC < 5.5V, BST=VCC,SWN = GND = PGND = 0.0V, UVIN = 3.0V, CVCC = 0.µF, CCOMP = 0.µF, CGH = CGL = 3.3nF, CSS = 50nF. PARAMETER MIN TYP MAX UNITS CONDITIONS CONTROL LOOP: PWM COMPARATOR, RAMP & LOOP DELAY PATH Ramp Offset .7 2.0 2.3 V TA = 25˚C Ramp Amplitude 0.80 .0 .20 V GH Minimum Pulse Width 30 70 ns Maximum Controllable Duty Ratio 92 % Maximum Duty Ratio 00 % Guaranteed by design Internal Oscillator Frequency 2.2 2.5 2.8 MHZ TIMERS: SOFTSTART SS Charge Current -6 -0 -4 µA SS Discharge Current .0 2.0 3.0 mA Fault Present VCC LINEAR REGULATOR VCC Output Voltage 4.6 5.0 5.4 V VIN = 6 to 23V, ILOAD = 0mA to 30mA Dropout Voltage 250 500 750 mV IVCC = 30mA POWER GOOD OUTPUT Power Good Threshold -0 -7.5 -5 % Power Good Hysteresis 2.0 4.0 % Power Good Sink Current .0 0 mA VFB = 0.7V, VPWRGD = 0.2V PROTECTION: SHORT CIRCUIT & THERMAL Short Circuit Threshold Voltage 0.2 0.25 0.3 V Measured VREF (0.8V) - VFB Overcurrent Threshold Voltage 54 60 66 mV Measured ISP - ISN ISP, ISN Common Mode Range 0 3.3 V Hiccup Timeout 20 30 40 ms Thermal Shutdown Temperature 35 45 55 ˚C Thermal Hysteresis 0 3.3 ˚C |
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