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MP24943 Datasheet(PDF) 3 Page - Monolithic Power Systems |
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MP24943 Datasheet(HTML) 3 Page - Monolithic Power Systems |
3 / 13 page MP24943 –3A, 55V, 100kHz STEP-DOWN CONVERTER MP24943 Rev. 0.83 www.MonolithicPower.com 3 12/11/2013 MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. © 2013 MPS. All Rights Reserved. ELECTRICAL CHARACTERISTICS VIN = 12V, TA = 25°C, unless otherwise noted. Parameters Symbol Condition Min Typ Max Units Feedback Voltage VFB 4.5V ≤ VIN ≤ 55V 0.78 0.80 0.82 V Feedback Bias Current IBIAS(FB) VFB = 0.8V -100 10 100 nA Output Over-Voltage Reference VOVREF 0.88 0.92 0.96 V Switch-On Resistance RDS(ON) 0.125 0.15 Ω Switch Leakage VEN = 0V, VSW = 0V 0.1 1 μA Current Limit Duty Cycle=10% 5.5 6.5 8 A Oscillator Frequency fSW VFB = 0.6V 70 100 140 kHz Bootstrap Voltage VBST - VSW 4.3 5.5 V Minimum-On Time tON 50 100 250 ns SW-rising edge trise 50 100 ns SW-falling edge tfall 50 100 ns EN-Input Low Voltage 0.4 V EN-Input High Voltage 1.8 V EN-Input Bias Current VEN=0-6V -10 -2 10 μA Under-Voltage Lockout Threshold Rising 3.0 3.3 3.6 V Under-Voltage Lockout Threshold Hysteresis 200 mV Supply Current (Shutdown) VEN=0V 4 10 μA Supply Current (Quiescent) VEN = 2V, VFB = 1V 650 800 μA Thermal Shutdown 150 °C |
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