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LM2576-5 Datasheet(PDF) 4 Page - Motorola, Inc |
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LM2576-5 Datasheet(HTML) 4 Page - Motorola, Inc |
4 / 28 page LM2576 4 MOTOROLA ANALOG IC DEVICE DATA DEVICE PARAMETERS ELECTRICAL CHARACTERISTICS (Unless otherwise specified, Vin = 12 V for the 3.3 V, 5.0 V, and Adjustable version, Vin = 25 V for the 12 V version, and Vin = 30 V for the 15 V 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 = 5.0 V [Adjustable Version Only]) Ib nA TJ = 25°C – 25 100 TJ = –40 to +125°C – – 200 Oscillator Frequency [Note 3] fosc kHz TJ = 25°C – 52 – TJ = 0 to +125°C 47 – 58 TJ = –40 to +125°C 42 – 63 Saturation Voltage (Iout = 3.0 A [Note 4]) Vsat V TJ = 25°C – 1.5 1.8 TJ = –40 to +125°C – – 2.0 Max Duty Cycle (“on”) [Note 5] DC 94 98 – % Current Limit (Peak Current [Notes 3 and 4]) ICL A TJ = 25°C 4.2 5.8 6.9 TJ = –40 to +125°C 3.5 – 7.5 Output Leakage Current [Notes 6 and 7], TJ = 25°C IL mA Output = 0 V – 0.8 2.0 Output = –1.0 V – 6.0 20 Quiescent Current [Note 6] IQ mA TJ = 25°C – 5.0 9.0 TJ = –40 to +125°C – – 11 Standby Quiescent Current (ON/OFF Pin = 5.0 V (“off”)) Istby µA TJ = 25°C – 80 200 TJ = –40 to +125°C – – 400 ON/OFF Pin Logic Input Level (Test Circuit Figure 15) V Vout = 0 V VIH TJ = 25°C 2.2 1.4 – TJ = –40 to +125°C 2.4 – – Vout = Nominal Output Voltage VIL TJ = 25°C – 1.2 1.0 TJ = –40 to +125°C – – 0.8 ON/OFF Pin Input Current (Test Circuit Figure 15) µA ON/OFF Pin = 5.0 V (“off”), TJ = 25°C IIH – 15 30 ON/OFF Pin = 0 V (“on”), TJ = 25°C IIL – 0 5.0 NOTES: 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 output 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 (Pin 2) sourcing current. No diode, inductor or capacitor connected to output pin. 5. Feedback (Pin 4) removed from output and connected to 0 V. 6. Feedback (Pin 4) removed from output and connected to +12 V for the Adjustable, 3.3 V, and 5.0 V versions, and +25 V for the 12 V and 15 V versions, to force the output transistor “off”. 7. Vin = 40 V. |
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