RC1585中文资料
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Features•Fast transient response•Low dropout voltage at up to 5A •Load regulation: 0.05% typical •Trimmed current limit •On-chip thermal limiting•Standard TO-220, TO-263, TO-263 center cut and TO-252 packagesApplications•Pentium ® class GTL+ bus supply •Low voltage logic supply•Post regulator for switching supplyDescriptionThe RC1585 and RC1585-1.5 are low dropout three-terminal regulators with 5A output current capability. These devices have been optimized for low voltage applications including V TT bus termination, where transient response and mini-mum input voltage are critical. The RC1585 is ideal for low voltage microprocessor applications requiring a regulated output from 1.5V to 3.6V with an input supply of 5V or less. The RC1585-1.5 offers fixed 1.5V with 5A current capabili-ties for GTL+ bus V TT termination.Current limit is trimmed to ensure specified output current and controlled short-circuit current. On-chip thermal limit-ing provides protection against any combination of overload and ambient temperature that would create excessive junc-tion temperatures.The RC1585 series regulators are available in the industry-standard TO-220, TO-263, TO-263 center cut and TO-252 power packages.RC15855A Adjustable/Fixed Low Dropout Linear RegulatorRC1585PRODUCT SPECIFICATION Pin AssignmentsAbsolute Maximum RatingsParameter Min.Max.UnitV IN7V Operating Junction Temperature Range0125°C Storage Temperature Range-65150°CLead Temperature (Soldering, 10 sec.)300°CPRODUCT SPECIFICATIONRC1585Electrical CharacteristicsTj = 25°C unless otherwise specified.The • denotes specifications which apply over the specified operating temperature range.Notes:1.See thermal regulation specifications for changes in output voltage due to heating effects. Load and line regulation aremeasured at a constant junction temperature by low duty cycle pulse testing.2.Line and load regulation are guaranteed up to the maximum power dissipation (18W). Power dissipation is determined byinput/output differential and the output currrent. Guaranteed maximum output power will not be available over the full input/output voltage range.3.RC1585 only.4.RC1585-1.5 only.Parameter ConditionsMin.Typ.Max Units Reference Voltage 3 1.5V ≤ (V IN – V OUT ) ≤ 5.75V, 10mA ≤ I OUT ≤ 5A • 1.225(-2%) 1.250 1.275(+2%)V Output Voltage 43V ≤ V IN ≤ 7V 10mA ≤ I OUT ≤ 5A • 1.471.5 1.53V Line Regulation 1, 2(V OUT + 1.5V) ≤ V IN ≤ 7V, I OUT = 10mA •0.0050.2%Load Regulation 1, 2, 3(V IN – V OUT ) = 3V, 10mA ≤ I OUT ≤ 5A •0.050.5%Dropout Voltage ∆V REF = 1%, I OUT = 5A • 1.150 1.300V Current Limit (V IN – V OUT ) = 2V• 5.1 5.5A Adjust Pin Current 3•35120µA Adjust Pin Current Change 3 1.5V ≤ (V IN – V OUT ) ≤ 5.75V,10mA ≤ I OUT ≤ 5A •0.25µA Minimum Load Current 1.5V ≤ (V IN – V OUT ) ≤ 5.75V •10mA Quiescent Current V IN = 5V•413mA Ripple Rejection f = 120Hz, C OUT = 22µF Tantalum, (V IN – V OUT ) = 3V, I OUT = 5A 6072dB Thermal Regulation T A = 25°C, 30ms pulse0.0040.02%/W Temperature Stability •0.5%Long-Term Stability T A = 125°C, 1000 hrs.0.03 1.0%RMS Output Noise (% of V OUT )T A = 25°C, 10Hz ≤ f ≤ 10kHz 0.003%Thermal Resistance, Junction to Case TO-2203°C/W TO-263, TO-2523°C/W Thermal Shutdown150°CRC1585PRODUCT SPECIFICATIONTypical Performance CharacteristicsFigure 1. Dropout Voltage vs. Output Current Figure 2. Load Regulation vs. TemperatureFigure 4. Output Voltage vs. TemperatureFigure 5. Minimum Load Current vs. Temperature Figure 6. Adjust Pin Current vs. TemperaturePRODUCT SPECIFICATION RC1585RC1585PRODUCT SPECIFICATIONPRODUCT SPECIFICATION RC1585RC1585PRODUCT SPECIFICATIONFigure 14. Application Circuit (RC1585)Table 1. Bill of Materials for Application Circuit for the RC1585Figure 15. Application Circuit (RC1585-1.5)Table 2. Bill of Materials for Application Circuit for the RC1585-1.5Item QuantityManufacturerPart Number Description C11Xicon L10V1010µF, 10V Aluminum C2, C32Xicon L10V100100µF, 10V Aluminum R11Generic 124Ω, 1%R21Generic 24.9Ω, 1%U11FairchildRC1585T 5A RegulatorItem QuantityManufacturerPart Number Description C11Xicon L10V1010µF, 10V Aluminum C31Xicon L10V100100µF, 10V Aluminum U11FairchildRC1585T -1.55A RegulatorJunction-to-case thermal resistance is specified from the IC junction to the bottom of the case directly below the die. This is the lowest resistance path for heat flow. Proper mounting ensures the best thermal flow from this area of the package to the heat sink. Use of a thermally conductive material at the case-to-heat sink interface is recommended. Use a thermally conductive spacer if the case of the device must be electri-cally isolated and include its contribution to the total thermal resistance. The cases of the RC1585 series are directly con-nected to the output of the device.PRODUCT SPECIFICATION RC1585RC1585PRODUCT SPECIFICATION Mechanical Dimensions (continued)3-Lead TO-263 Center Cut PackagePRODUCT SPECIFICATION RC15851.Life support devices or systems are devices or systemswhich, (a) are intended for surgical implant into the body, or (b) support or sustain life, or (c) whose failure to perform when properly used in accordance with instructions for use provided in the labeling, can be reasonably expected to result in significant injury to the user.2. A critical component is any component of a life supportdevice or system whose failure to perform can bereasonably expected to cause the failure of the life support device or system, or to affect its safety or effectiveness.。
