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LM2576T-3.3 Scheda tecnica(PDF) 2 Page - Motorola, Inc |
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LM2576T-3.3 Scheda tecnica(HTML) 2 Page - Motorola, Inc |
2 / 28 page LM2576 2 MOTOROLA ANALOG IC DEVICE DATA Figure 1. Block Diagram and Typical Application 7.0 V – 40 V Unregulated DC Input L1 100 µH Gnd +Vin 1 Cin 100 µF 3ON/OFF 5 Output 2 Feedback 4 D1 1N5822 Cout 1000 µF Typical Application (Fixed Output Voltage Versions) Representative Block Diagram and Typical Application Unregulated DC Input +Vin 1 Cout Feedback 4 Cin L1 D1 R2 R1 1.0 k Output 2 Gnd 3 ON/OFF 5 Reset Latch Thermal Shutdown 52 kHz Oscillator 1.235 V Band–Gap Reference Freq Shift 18 kHz Comparator Fixed Gain Error Amplifier Current Limit Driver 1.0 Amp Switch ON/OFF 3.1 V Internal Regulator Regulated Output Vout Load Output Voltage Versions 3.3 V 5.0 V 12 V 15 V R2 ( Ω) 1.7 k 3.1 k 8.84 k 11.3 k For adjustable version R1 = open, R2 = 0 Ω LM2576 5.0 V Regulated Output 3.0 A Load ABSOLUTE MAXIMUM RATINGS (Absolute Maximum Ratings indicate limits beyond which damage to the device may occur.) Rating Symbol Value Unit Maximum Supply Voltage Vin 45 V ON/OFF Pin Input Voltage – –0.3 V ≤ V ≤ +Vin V Output Voltage to Ground (Steady–State) – –1.0 V Power Dissipation Case 314B and 314D (TO–220, 5–Lead) PD Internally Limited W Thermal Resistance, Junction–to–Ambient R θJA 65 °C/W Thermal Resistance, Junction–to–Case R θJC 5.0 °C/W Case 936A (D2PAK) PD Internally Limited W Thermal Resistance, Junction–to–Ambient R θJA 70 °C/W Thermal Resistance, Junction–to–Case R θJC 5.0 °C/W Storage Temperature Range Tstg –65 to +150 °C Minimum ESD Rating (Human Body Model: C = 100 pF, R = 1.5 k Ω) – 2.0 kV Lead Temperature (Soldering, 10 seconds) – 260 °C Maximum Junction Temperature TJ 150 °C NOTE: ESD data available upon request. |
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