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LM3674MFX-1.875 Datasheet(PDF) 4 Page - Texas Instruments |
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LM3674MFX-1.875 Datasheet(HTML) 4 Page - Texas Instruments |
4 / 25 page LM3674 SNVS405F – DECEMBER 2005 – REVISED MAY 2013 www.ti.com Absolute Maximum Ratings (1) (2) VIN Pin: Voltage to GND −0.2V to 6.0V EN, FB, SW Pin: (GND −0.2V) to (VIN + 0.2V) Continuous Power Dissipation(3) Internally Limited Junction Temperature (TJ-MAX) +125°C Storage Temperature Range −65°C to +150°C Maximum Lead Temperature 260°C (Soldering, 10 sec.) ESD Rating(4) 2 kV Human Body model: All Pins Machine Model: All Pins 200V (1) Absolute Maximum Ratings indicate limits beyond which damage to the device may occur. Operating Ratings are conditions under which operation of the device is ensured. Operating Ratings may not imply performance limits. For performance limits and associated test conditions, see the Electrical Characteristics tables. (2) If Military/Aerospace specified devices are required, please contact the TI Sales Office/Distributors for availability and specifications. (3) In Applications where high power dissipation and /or poor package resistance is present, the maximum ambient temperature may have to be derated. Maximum ambient temperature (TA-MAX ) is dependent on the maximum operating junction temperature (TJ-MAX ), the maximum power dissipation of the device in the application (PD-MAX ) and the junction to ambient thermal resistance of the package (θJA) in the application, as given by the following equation: TA-MAX = TJ-MAX- (θJA x PD-MAX). Refer to Dissipation ration table for PD-MAX values at different ambient temperatures. (4) The Human body model is a 100 pF capacitor discharged through a 1.5 k Ω resistor into each pin. The machine model is a 200 pF capacitor discharged directly into each pin (MIL-STD-883 3015.7). National Semiconductor recommends that all intergrated circuits be handled with appropriate precautions. Failure to observe proper ESD handling techniques can result in damage. Operating Ratings (1) (2) (3) Input Voltage Range(4) 2.7V to 5.5V Recommended Load Current 0A to 600 mA Junction Temperature (TJ) Range −30°C to +125°C Ambient Temperature (TA) Range −30°C to +85°C (1) In Applications where high power dissipation and /or poor package resistance is present, the maximum ambient temperature may have to be derated. Maximum ambient temperature (TA-MAX ) is dependent on the maximum operating junction temperature (TJ-MAX ), the maximum power dissipation of the device in the application (PD-MAX ) and the junction to ambient thermal resistance of the package (θJA) in the application, as given by the following equation: TA-MAX = TJ-MAX- (θJA x PD-MAX). Refer to Dissipation ration table for PD-MAX values at different ambient temperatures. (2) Absolute Maximum Ratings indicate limits beyond which damage to the device may occur. Operating Ratings are conditions under which operation of the device is ensured. Operating Ratings may not imply performance limits. For performance limits and associated test conditions, see the Electrical Characteristics tables. (3) All voltages are with respect to the potential at the GND pin. (4) Input voltage range recommended for ideal applications performance for the specified output voltages are given below VIN = 2.7V to 5.5V for 1.0V ≤ VOUT < 1.8V VIN = ( VOUT + VDROP OUT) to 5.5V for 1.8 ≤ VOUT≤ 3.3V Where VDROP OUT = ILOAD * (RDSON (P) + RINDUCTOR) Thermal Properties (1) over operating free-air temperature range (unless otherwise noted) Junction-to-Ambient Thermal Resistance ( θJA) (SOT-23) for a 2 layer board (2) 250°C/W Junction-to-Ambient Thermal Resistance ( θJA) (SOT-23) for a 4 layer board (2) 130°C/W (1) Internal thermal shutdown circuitry protects the device from permanent damage. Thermal shutdown engages at TJ = 150°C (typ.) and disengages at TJ = 130°C (2) Junction to ambient thermal resistance ( θJA) is highly application and board layout dependent. In applications where high power dissipation exists, special care must be given to thermal dissipation issues in board design. Value specified here 250°C/W is based on measurement results using a 2 layer, 4" X 3", 2 oz. Cu board as per JEDEC standards. The θJA is 130°C/W if a 4 layer, 4" X 3", 2/1/1/2 oz. Cu board as per JEDEC standards is used. 4 Submit Documentation Feedback Copyright © 2005–2013, Texas Instruments Incorporated Product Folder Links: LM3674 |
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