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LM2744 Arkusz danych(PDF) 3 Page - Texas Instruments |
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LM2744 Arkusz danych(HTML) 3 Page - Texas Instruments |
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3 / 33 page  LM2744 www.ti.com SNVS292F – SEPTEMBER 2004 – REVISED MARCH 2013 These devices have limited built-in ESD protection. The leads should be shorted together or the device placed in conductive foam during storage or handling to prevent electrostatic damage to the MOS gates. ABSOLUTE MAXIMUM RATINGS (1) (2) VCC -0.3 to 7V BOOT Voltage -0.3 to 21V All other pins -0.3 to VCC + 0.3V Junction Temperature 150°C Storage Temperature −65°C to 150°C Lead Temperature (soldering, 10sec) 260°C Soldering Information Infrared or Convection (20sec) 235°C ESD Rating(3) 2 kV (1) Absolute maximum ratings indicate limits beyond which damage to the device may occur. Operating ratings indicate conditions for which the device operates correctly. Operating Ratings do not imply ensured performance limits. (2) If Military/Aerospace specified devices are required, contact the Texas Instruments Sales Office/Distributors for availability and specifications. (3) The human body model is a 100pF capacitor discharged through a 1.5k resistor into each pin. RECOMMENDED OPERATING CONDITIIONS Supply Voltage Range (VCC) 3V to 6V Junction Temperature Range (TJ) −40°C to +125°C Thermal Resistance ( θJA) 155°C/W Voltage on FB and VREF 0.5V to 1.5V ELECTRICAL CHARACTERISTICS (1) VCC = 3.3V unless otherwise indicated. Typicals and limits appearing in plain type apply for TA= TJ= 25°C. Limits appearing in boldface type apply over full Operating Temperature Range. Datasheet min/max specification limits are specified by design, test, or statistical analysis. Symbol Parameter Conditions Min Typ Max Units VON UVLO Thresholds Rising 2.76 V Falling 2.42 VCC = 3.3V, VSD = 3.3V 1.0 1.5 2.1 Fsw = 600kHz Operating VCC Current mA IQ_VCC VCC = 5V, VSD = 3.3V 1.0 1.7 2.1 Fsw = 600kHz Shutdown VCC Current VCC = 3.3V, VSD = 0V 1 25 µA tPWGD1 PWGD Pin Response Time VFB Rising 6 µs tPWGD2 PWGD Pin Response Time VFB Falling 6 µs ISS-ON SS Pin Source Current VSS = 0V 5 10 15 µA ISS-OC SS Pin Sink Current During Over VSS = 2.5V 90 µA Current ISEN-TH ISEN Pin Source Current Trip Point 20 40 60 µA ERROR AMPLIFIER VOS Error Amplifier Input Offset Voltage -8 1 8 mV GBW Error Amplifier Unity Gain Bandwidth 9 MHz G Error Amplifier DC Gain 106 dB SR Error Amplifier Slew Rate 3.2 V/µs IEAO EAO Pin Current Sourcing and Sinking VEAO = 1.5, FB = 0.55V 2.6 mA Capability VEAO = 1.5, FB = 0.65V 9.2 VEA Error Amplifier Output Voltage Minimum 1 V Maximum 2 V (1) The power MOSFETs can run on a separate 1V to 16V rail (Input voltage, VIN). Practical lower limit of VIN depends on selection of the external MOSFET. Copyright © 2004–2013, Texas Instruments Incorporated Submit Documentation Feedback 3 Product Folder Links: LM2744 |
Podobny numer części - LM2744_15 |
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Podobny opis - LM2744_15 |
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