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MP28248GD Datasheet(PDF) 3 Page - Monolithic Power Systems |
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MP28248GD Datasheet(HTML) 3 Page - Monolithic Power Systems |
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3 / 19 page ![]() MP28248 – 3A, 4.2V-20V INPUT, FAST-TRANSIENT SYNCHRONOUS STEP-DOWN CONVERTER IN QFN12 (2X3mm) MP28248 Rev 1.0 www.MonolithicPower.com 3 1/5/2012 MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. © 2012 MPS. All Rights Reserved. ELECTRICAL CHARACTERISTICS VIN = 12V, TA = 25°C, unless otherwise noted. Parameters Symbol Condition Min Typ Max Units Supply current (shutdown) IIN VEN = 0V 0 μA Supply current (quiescent) IQ VEN = 2V, VFB = 0.9V 440 490 μA HS switch-on resistance (5) HSRDS-ON 120 mΩ LS switch-on resistance (5) LSRDS-ON 50 mΩ Switch leakage SWLKG VEN = 0V, VSW = 0V or 12V 0 1 μA Current limit ILIMIT After Soft-Start time-out 4 5 A One-shot on-time tON R7 = 600kΩ, VOUT = 1.2V 480 ns R7 = 200kΩ, VOUT = 1.2V 160 ns R7 = 120kΩ, VOUT = 1.2V 100 ns Minimum off time tOFF 125 ns Fold-back off Time (5) tFB-OCP IL=ILIM=1 FB=0.6V 5 μs tFB-SCP IL=ILIM=1 FB=0.2V 10 μs OCP hold-off time (5) tOC IL=ILIM=1 FB=0.6V 50 μs Feedback voltage VFB TA=25°C 807 815 823 mV Feedback current IFB VFB=815mV 30 50 nA EN rising threshold ENVth-Hi 1.05 1.3 1.6 V EN threshold hysteresis ENVth-Hys 500 mV EN input current IEN VEN = 2V 1.5 µA VEN = 0V 0 µA Soft-start charging current ISS VSS = 0V 14 µA Soft stop charging current ISS VSS=0.815V 4.5 μA VIN under-voltage lockout threshold rising INUVVth 3.1 V VIN under-voltage lockout threshold hysteresis INUVHYS 300 mV Thermal shutdown TSD 150 °C Thermal shutdown hysteresis TSD-HYS 25 °C Note: 5) Guaranteed by design and characterization |
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