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MP28259DD-A Datasheet(PDF) 3 Page - Monolithic Power Systems |
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MP28259DD-A Datasheet(HTML) 3 Page - Monolithic Power Systems |
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3 / 18 page  MP28259 – 2A, 4.2V-20V INPUT, FAST TRANSIENT SYNCHRONOUS STEP-DOWN CONVERTER MP28259 Rev. 1.34 www.MonolithicPower.com 3 4/27/2012 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) IIN VEN = 2V, VFB = 0.9V 360 μA HS switch-on resistance HSRDS-ON 130 mΩ LS switch On-resistance LSRDS-ON 80 mΩ Switch leakage SWLKG VEN = 0V, VSW = 0V or 12V 0 10 μA Current limit (5) ILIMIT After soft-start time-out 3 4 A One-shot on time TON R7 = 300kΩ, VOUT = 1.2V 250 ns Minimum off time TOFF 220 ns Fold-back off time TFB ILIM = 1 4.5 μs OCP hold-off time TOC ILIM = 1 50 μs TA = 25°C 807 815 823 mV Feedback toltage VFB TA = -40°C to 85°C 803 827 mV Feedback current IFB VFB = 800mV 10 50 nA Soft-start time TSS 1 ms EN rising threshold ENVth-Hi 1.05 1.35 1.6 V EN threshold hysteresis ENVth-Hys 500 mV EN input current IEN VEN = 2V 2 μA VEN = 0V 0 Power-good rising threshold PGVth-Hi 0.9 VFB Power-good falling threshold PGVth-Lo 0.85 VFB Power-good delay PGTd 0.5 ms Power-good sink current capability VPG Sink 4mA 0.4 V Power-good leakage current IPG_LEAK VPG = 3.3V 10 nA 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. |
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