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LM2574BN データシート(PDF) 4 Page - Micrel Semiconductor |
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LM2574BN データシート(HTML) 4 Page - Micrel Semiconductor |
4 / 8 page LM2574 Micrel, Inc. M9999-072805 4 July 2005 Electrical Characteristics Symbol Parameter Condition Min Typ Max Units Device Parameters, Adjustable Regulator IB Feedback Bias Current VOUT = 5V 50 100 nA 500 nA Device Parameters, Fixed and Adjustable Regulators fo Oscillator Frequency Note 8 47 52 58 kHz 42 63 kHz VSAT Saturation Voltage IOUT = 0.5A(4) 0.8 1.2 V 1.4 V DC Max Duty Cycle (ON) Note 5 93 98 % ICL Current Limit Peak Current, tON ≤ 3µs(4) 0.7 1.0 1.6 A 0.65 1.8 IL Output Leakage Current VIN, Note 6, Output = 0V 2 mA Note 6, Output = –1V 7.5 30 IQ Quiescent Current Note 6 5 10 mA ISTBY Standby Quiescent Current ON/OFF Pin = 5V (OFF) 50 200 µA θJA Thermal Resistance N Package, Junction to Ambient(7) 85 °C/W On/Off Control, Fixed and Adjustable Regulators Test Circuit Figures 2, 3 VIH ON/OFF Input Level VOUT = 0V 2.2 1.4 V 2.4 V VIL ON/OFF Input Level VOUT = 5V 1.2 1.0 V 0.8 V IIH ON/OFF Logic Current ON/OFF = 5V (OFF) 4 30 µA IIL ON/OFF Logic Current ON/OFF = 0V (ON) 0.01 10 µA Notes: 4. Output (pin 2) sourcing current. No diode, inductor, or capacitor connected to input. 5. Feedback (pin 4) removed from output and connected to 0V. 6. Feedback (pin 4) removed from output and connected to 12V to force the output transistor OFF. 7. Junction-to-ambient thermal resistance with approximately 1 square inches of PC board copper surrounding the leads. Test Circuit VIN PWR GND SIG GND ON/ OFF OUT FB LM2574 (adjustable) CIN 22µF 11DQ06 COUT 220µF 330µH 3.09k 1k Figure 2. Adjustable Regulator Test Circuit VIN P W R GND SIG GND ON/ OFF OUT FB LM2574– 3.3, 5, 12 CIN 22µF 11DQ06 COUT 220µF 330µH Figure 3. Fixed Regulator Test Circuit |
同様の部品番号 - LM2574BN |
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同様の説明 - LM2574BN |
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