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LM2576T-12 数据表(PDF) 7 Page - HTC Korea TAEJIN Technology Co. |
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LM2576T-12 数据表(HTML) 7 Page - HTC Korea TAEJIN Technology Co. |
7 / 11 page 3A, 52kHz, Step-Down Switching Regulator LM2576 Dec 2011 – Rev. 1.3 - 7 - HTC ELECTRICAL CHARACTERISTICS / Device Parameters (Unless otherwise specified, Vin = 12V for the 3.3V, 5.0V, and Adjustable version, Vin = 25V for the 12V version. ILoad = 500 mA. For typical values TJ = 25°C, for min/max values TJ is the operating junction temperature range that applies [Note 2], unless otherwise noted.) Characteristics Symbol MIN. TYP. MAX. Unit All Output Voltage Versions Feedback Bias Current (Vout=5.0V [Adjustable Version Only]) TJ=25℃ TJ= -40 to +125℃ Ib - - 25 - 100 200 nA Oscillator Frequency [Note 3] TJ=25℃ TJ= 0 to +125℃ TJ= -40 to +125℃ FOSC - 47 42 52 - - - 58 63 kHz Saturation Voltage (Iout=3.0A [note 4]) TJ= 25℃ TJ= -40 to +125℃ VSAT - - 1.5 - 1.8 2 V Max Duty Cycle (“0”) [Note 5] DC 94 98 - % Current Limit (Peak Current [Note 3 and 4]) TJ= 25℃ TJ= -40 to +125℃ ICL 4.2 3.5 5.8 - 6.9 7.5 A Output Leakage Current [Note 6 and 7], TJ=25℃ Output = 0V Output = -1.0V IL - - 0.8 6 50 30 mA Quiescent Current [Note 6] TJ= 25℃ TJ= -40 to +125℃ IQ - - 5 - 9 11 mA Standby Quiescent Current (ON/OFF Pin = 5.0V ("off")) TJ=25℃ TJ= -40 to +125℃ ISTBY - - 80 - 200 400 µA ON/OFF Pin Logic Input Level (Test circuit Figure 15) Vout=0V TJ=25℃ TJ= -40 to +125℃ VIH 2.2 2.4 1.4 - - - V Vout=Nominal Output Voltage TJ=25℃ TJ= -40 to +125℃ VIL - - 1.2 - 1 0.8 V ON/OFF Pin Input Current (Test Circuit Figure 15) ON/OFF Pin = 5.0V (Regulator OFF), TJ=25℃ ON/OFF Pin = 0V (Regulator ON), TJ=25℃ IIH IIL - - 15 0 30 0.5 µA 3. The oscillator frequency reduces to approximately 18 kHz in the event of an output short or an overload which causes the regulated output voltage to drop approximately 40% from the nominal voltage. This self protection feature lowers the average dissipation of the IC by lowering the minimum duty cycle from 5% down to approximately 2% 4. Output sourcing current. No diode, inductor or capacitor connected to output pin. 5. Feedback removed from output and connected to 0V. 6. Feedback removed from output and connected to +12V for the Adjustable, 3.3V, and 5.0V versions, and +25V for the 12V version, to force the output transistor “off”. 7. Vin = 40V. |
类似零件编号 - LM2576T-12 |
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类似说明 - LM2576T-12 |
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