LM/-Q1 does not rely on output capacitor ESR An IMPORTANT NOTICE at the end of this data sheet addresses availability, warranty, changes, use in. LM Synchronous 1MHz A Step-Down Voltage Regulator from the PowerWise® Family The LM Synchronously Rectified Buck Converter features all. The LM Synchronously Rectified Buck Converter Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
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The input capacitor is calculated from: To ensure that the on-time is larger than the minimum limit, which is ns, the value of R1 must satisfy the following equation: Determine the inductance The main parameter affected by the inductor is the amplitude of the inductor current ripple ILR.
Dwtasheet does not warrant datasneet represent that any license, either express or implied, is granted under any patent right, copyright, mask work right, or other intellectual property right relating to any combination, machine, or process in which TI components or services are used. The average current during the on-time is the load current. Vias should be added to connect the ground of the input capacitors to a ground plane, located as close datsheet the capacitor as possible.
LM3102 PDF Datasheet浏览和下载
Layout is therefore critical for optimum performance. Buyers are responsible for their products and applications using TI components. If the output voltage is higher than 1. The connection from the PGND pin to the input capacitors should be as short and direct as possible.
Except where mandated by applicable law, testing of all parameters of each component is not necessarily performed. Products Applications Audio www. This user’s guide details the design of a demonstration board which provides a 3. The time is determined from the following equation: Once ILR is selected, L can be determined by: The exposed pad is internally connected to the Datqsheet IC substrate.
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It must be as neat and compact as possible, and all external components must dagasheet as close to their associated pins of the LM as possible. How much energy is.
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The demonstration board schematic, PCB layout, Bill of Materials, and circuit design descriptions are shown. The output capacitor C10, C11 should be connected close to the datashfet and tied directly to the ground plane.
In this demonstration board, a 10 nF capacitor is used. Use of such information may require a license from a third party under the patents or other intellectual property of the third party, or a license from TI under the patents or other intellectual property of TI.
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LM (NSC) PDF技术资料下载 LM 供应信息 IC Datasheet 数据表 (1/18 页)
Calculate the on-time setting resistor The switching frequency fSW of the demonstration board is affected datzsheet the on-time ton of the LM, which is determined by R1. Additionally the use of thick traces, where possible, can help conduct heat away from the LM Protection features include output over-voltage protection, thermal shutdown, VCC undervoltage lock-out, gate drive under-voltage lock-out. Using numerous vias to connect the die attached pad to the ground plane is a good practice.
The inductor L1 should be connected close to the SW pin with as short a trace as possible to reduce the potential for EMI electromagnetic interference generation.
Determine the value of other components C1 and C2: The design of the demonstration board is detailed below. Typical performance and operating waveforms are also provided for reference. C8 should be no smaller than nF for stability, om3102 should be a good quality, low ESR, ceramic capacitor.
LM Datasheet(PDF) – National Semiconductor (TI)
A load which creates significant transients requires a larger output capacitor than a fixed load. No TI components are authorized for use in FDA Class III or similar life-critical medical equipment unless authorized officers of the parties have executed a special agreement specifically governing such use. TI is not responsible or liable for such altered documentation.
Nonetheless, such components are subject to these terms. The Constant On-Time COT regulation scheme requires no loop compensation, results in a fast load transient response and simple circuit implementation that allows a low component count, and consequently very small overall board space is required for a typical application. Experimentation is usually necessary to determine the minimum value for the output capacitor, as the nature of the load may require a larger value.