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LM22677QTJ-ADJ bảng dữ liệu(PDF) 3 Page - National Semiconductor (TI) |
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LM22677QTJ-ADJ bảng dữ liệu(HTML) 3 Page - National Semiconductor (TI) |
3 / 16 page Absolute Maximum Ratings (Note 1) If Military/Aerospace specified devices are required, please contact the National Semiconductor Sales Office/ Distributors for availability and specifications. VIN to GND 43V EN Pin Voltage -0.5V to 6V RT/SYNC Pin Voltage -0.5V to 7V SW to GND (Note 2) -5V to V IN BOOT Pin Voltage V SW + 7V FB Pin Voltage -0.5V to 7V Power Dissipation Internally Limited Junction Temperature 150°C Soldering Information Infrared (5 sec.) 260°C ESD Rating (Note 3) Human Body Model ±2 kV Storage Temperature Range -65°C to +150°C Operating Ratings (Note 1) Supply Voltage (V IN) 4.5V to 42V Junction Temperature Range -40°C to +125°C Electrical Characteristics Limits in standard type are for T J = 25°C only; limits in boldface type apply over the junction temperature (T J) range of -40°C to +125°C. Minimum and Maximum limits are guaranteed through test, design, or statistical correlation. Typical values represent the most likely parametric norm at T A = TJ = 25°C, and are provided for reference purposes only. Unless otherwise specified: V IN = 12V. Symbol Parameter Conditions Min (Note 5) Typ (Note 4) Max (Note 5) Units LM22677-5.0 V FB Feedback Voltage V IN = 8V to 42V 4.925/4.9 5.0 5.075/5.1 V LM22677-ADJ V FB Feedback Voltage V IN = 4.7V to 42V 1.266/1.259 1.285 1.304/1.311 V All Output Voltage Versions I Q Quiescent Current V FB = 5V 3.4 6 mA I STDBY Standby Quiescent Current EN Pin = 0V 25 40 µA I CL Current Limit 6.0/5.75 7.1 8.4/8.75 A I L Output Leakage Current V IN = 42V, EN Pin = 0V, VSW = 0V 0.2 2 µA V SW = -1V 0.1 3 µA R DS(ON) Switch On-Resistance 0.1 0.14/0.2 Ω f O Oscillator Frequency 400 500 600 kHz T OFFMIN Minimum Off-time 100 200 300 ns T ONMIN Minimum On-time 100 ns I BIAS Feedback Bias Current V FB = 1.3V (ADJ Version Only) 230 nA V EN Enable Threshold Voltage Falling 1.3 1.6 1.9 V V ENHYST Enable Voltage Threshold Hysteresis 0.6 V I EN Enable Input Current EN Input = 0V 6 µA F SYNC Synchronization Frequency V SYNC = 3.5V, 50% duty-cycle 1 MHz V SYNC Synchronization Threshold Voltage 1.75 V T SD Thermal Shutdown Threshold 150 °C θ JA Thermal Resistance TJ Junction to ambient temperature resistance (Note 6) 22 °C/W 3 www.national.com |
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