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LM2576-12WT Arkusz danych(PDF) 4 Page - Micrel Semiconductor |
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LM2576-12WT Arkusz danych(HTML) 4 Page - Micrel Semiconductor |
4 / 9 page M9999-082605-B 4 August 2005 LM2576 Micrel, Inc. Electrical Characteristics (continued) LM2576 Units Symbol Parameter Conditions Typ Limit (Limits) (Note 2) DEVICE PARAMETERS, ADJUSTABLE REGULATOR I B Feedback Bias Current V OUT = 5V 50 100/500 nA DEVICE PARAMETERS, FIXED and ADJUSTABLE REGULATORS f O Oscillator Frequency 52 kHz 47/42 kHz (min) 58/63 kHz (max) V SAT Saturation Voltage I OUT = 3A (Note 4) 1.4 V 1.8/2.0 V(max) DC Max Duty Cycle (ON) (Note 5) 98 % 93 %(min) I CL Current Limit Peak Current, t ON ≤ 3µs (Note 4) 5.8 A 4.2/3.5 A(min) 6.9/7.5 A(max) I L Output Leakage Current V IN = 40V, (Note 6), Output = 0V 2 mA(max) Output = –1V 7.5 mA (Note 6) Output = –1V 30 mA(max) I Q Quiescent Current (Note 6) 5 mA 10 mA(max) I STBY Standby Quiescent ON/OFF Pin = 5V (OFF) 50 µA Current 200 µA(max) θ JA Thermal Resistance T,U Package, Junction to Ambient (Note 7) 65 °C/W θ JA T,U Package, Junction to Ambient (Note 8) 45 θ JC T,U Package, Junction to Case 2 |
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