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LM27402MHX データシート(PDF) 4 Page - National Semiconductor (TI) |
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LM27402MHX データシート(HTML) 4 Page - National Semiconductor (TI) |
4 / 32 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. Unless otherwise specified, voltages are from the indicated pins to GND. VIN, CS+, CS-, SW -0.3V to +22V VDD, PGOOD -0.3V to +6V EN, SYNC, SS/TRACK, FADJ, COMP, FB, LG -0.3V to VDD CBOOT -0.3V to +24V CBOOT to SW +6V CS+ to CS- -2V to +2V Storage Temperature -65°C to 150°C Junction Temperature 150°C Lead Temperature (Soldering, 10 sec) 260°C Minimum ESD Rating (Note 2) ±2kV Operating Ratings (Note 1) Input Voltage Range (Note 3) VIN +3.0V to +20V VIN (VDD = VIN) +3.0V to +5.5V VDD to GND +2.2V to +5.5V SS/TRACK, SYNC, EN 0V to V VDD PGOOD 0V to +5.5V Junction Temperature -40°C to + 125°C θ JA (LLP-16) (Note 4) 40°C/W θ JA (eTSSOP-16) (Note 4) 40°C/W Electrical Characteristics Unless otherwise stated, the following conditions apply: V IN = 12V. Limits in standard type are for T J = 25°C only, limits in bold face type apply over the junction temperature (TJ) 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 J = 25°C and are provided for reference purposes only. System Parameters Symbol Parameter Conditions Min Typ Max Units OPERATIONAL SPECIFICATIONS I Q Quiescent Current V FB = 0.6V (not switching) 4.5 6.0 mA I QSD Quiescent Current In Shutdown V EN = 0V 25 45 µA UVLO UVLO Input Under Voltage Lockout V VIN Rising, VVDD Rising 2.7 2.9 2.99 V UVLO HYS UVLO Hysteresis V VIN Falling, VVDD Falling 300 mV REFERENCE V FB Feedback Voltage 0.594 0.600 0.606 V I FB Feedback Pin Bias Current V FB = 0.65V -50 0 50 nA SWITCHING F SW Switching Frequency R FADJ = 4.12 kΩ 950 1150 1350 kHz F SW Switching Frequency R FADJ = 20 kΩ 400 500 600 kHz F SW Switching Frequency R FADJ = 95.3 kΩ 175 214 265 kHz D MAX Maximum Duty Cycle F SW = 300 kHz 93 95 % T OFF_MIN Minimum Off Time V FB = 0.5V 125 165 205 ns VDD SUB-REGULATOR V DD Sub-Regulator Output Voltage I DD = 25 mA 4.0 4.5 5.0 V ERROR AMPLIFIER B W-3db Open Loop Bandwidth 2 MHz A VOL Error Amp DC Gain 50 dB V SLEW_RISE Error Amplifier Rising Slew Rate V FB = 0.5V 5 V/µs V SLEW_FALL Error Amplifier Falling Slew Rate V FB = 0.7V 3 V/µs I SOURCE COMP Source Current V FB = 0.5V 8 12 mA I SINK COMP Sink Current V FB = 0.7V 4 12 mA V COMP_MAX Max COMP Voltage V FB = 0.5V 3.1 V V COMP_MIN Min COMP Voltage V FB = 0.7V 0.5 V www.national.com 4 |
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同様の説明 - LM27402MHX |
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