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MP2234S Scheda tecnica(PDF) 4 Page - Monolithic Power Systems |
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MP2234S Scheda tecnica(HTML) 4 Page - Monolithic Power Systems |
4 / 19 page MP2234S – SYNCHRONOUS STEP-DOWN CONVERTER MP2234S Rev.1.0 www.MonolithicPower.com 4 4/3/2015 MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. © 2015 MPS. All Rights Reserved. ELECTRICAL CHARACTERISTICS VIN=12V, TJ=-40°C to +125°C (6), typical value is tested at TJ=+25°C, unless otherwise noted. Parameter Symbol Condition Min Typ Max Units Supply Current (Shutdown) IIN VEN = 0V, TJ=+25°C 1 μA VEN = 0V, TJ=-40°C to +125°C 5 μA Supply Current (Quiescent) Iq VEN = 2V, VFB = 1V 0.5 1 mA HS Switch-On Resistance HSRDS-ON VBST-SW=5V 140 mΩ LS Switch-On Resistance LSRDS-ON VCC =5V 60 mΩ Switch Leakage SWLKG VEN = 0V, VSW =12V or 0V 1 μA Current Limit ILIMIT Under 40% Duty Cycle 3 4 A Oscillator Frequency fSW VFB=0.75V,TJ=+25°C 620 800 900 kHz VFB=0.75V,TJ=-40°C to +125°C 550 800 900 kHz Fold-Back Frequency fFB VFB<400mV 0.5 fSW Maximum Duty Cycle DMAX VFB=700mV 92 % Minimum On Time (7) τON_MIN 40 ns Sync Frequency Range fSYNC 0.3 2 MHz Feedback Voltage VFB TJ =25°C 788 804 820 mV TJ=-40°C to +125°C 784 804 824 mV Feedback Current IFB VFB=830mV 10 50 nA EN Rising Threshold VEN_RISING 1 1.4 1.8 V EN Hysteresis VEN Hysteresis 150 mV EN Input Current IEN VEN=2V 2 μA VEN=0 0 μA EN Turn-Off Delay ENtd-off 10 μs VIN Under-Voltage Lockout Threshold—Rising INUVVth 3.5 3.9 4.3 V VIN Under-Voltage Lockout Threshold—Hysteresis INUVHYS 700 mV VCC Regulator VCC 4.6 5 5.4 V VCC Load Regulation ICC=5mA 2 % Soft-Start Current ISS 8 11 14 μA Thermal Shutdown (7) 150 °C Thermal Hysteresis (7) 20 °C Notes: 6) Not tested in production. Guaranteed by over-temperature correlation. 7) Guaranteed by design. |
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