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MP1475 데이터시트(PDF) 3 Page - Monolithic Power Systems |
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MP1475 데이터시트(HTML) 3 Page - Monolithic Power Systems |
3 / 16 page MP1475 – SYNCHRONOUS STEP-DOWN CONVERTER MP1475 Rev. 1.01 www.MonolithicPower.com 3 4/3/2014 MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. © 2014 MPS. All Rights Reserved. ELECTRICAL CHARACTERISTICS (6) VIN = 12V, TA = 25°C, unless otherwise noted. Parameter Symbol Condition Min Typ Max Units Supply Current (Shutdown) IIN VEN = 0V 7 μA Supply Current (Quiescent) Iq VEN = 2V, VFB = 1V 0.6 1 mA HS Switch-On Resistance HSRDS-ON VBST-SW=5V 80 mΩ LS Switch-On Resistance LSRDS-ON VCC =5V 30 mΩ Switch Leakage SWLKG VEN = 0V, VSW =12V 1 μA Current Limit (6) ILIMIT Under 40% Duty Cycle 4.2 5 A Oscillator Frequency fSW VFB=0.75V 430 500 570 kHz Fold-Back Frequency fFB VFB<400mV 0.25 fSW Maximum Duty Cycle DMAX VFB=700mV 90 95 % Minimum On Time (6) τON_MIN 40 ns Sync Frequency Range fSYNC 0.2 2 MHz TA =25°C 791 807 823 Feedback Voltage VFB -40°C<TA<85°C (7) 787 807 827 mV Feedback Current IFB VFB=820mV 10 50 nA EN Rising Threshold VEN_RISING 1.2 1.4 1.6 V EN Falling Threshold VEN_FALLING 1.1 1.25 1.4 V VEN=2V 2 μA EN Input Current IEN VEN=0 0 μA EN Turn-Off Delay ENtd-off 5 μs Power-Good Rising Threshold PGvth-Hi 0.9 VFB Power-Good Falling Threshold PGvth-Lo 0.85 VFB Power-Good Delay PGTd 0.4 ms Power-Good Sink Current Capabilily VPG Sink 4mA 0.4 V Power-Good Leakage Current IPG-LEAK 1 μA VIN Under-Voltage Lockout Threshold-Rising INUVVth 3.7 3.9 4.1 V VIN Under-Voltage Lockout Threshold-Hysteresis INUVHYS 650 mV VCC Regulator VCC 5 V VCC Load Regulation ICC=5mA 3 % Soft-Start Period τSS 1.2 ms Thermal Shutdown (6) 150 °C Thermal Hysteresis (6) 20 °C Notes: 6) Guaranteed by design. 7) Not tested in production and guaranteed by over-temperature correlation. |
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