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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It must be as neat and compact as possible, and all external components must be as close to their associated pins of the LM as possible.

The exposed pad is internally connected to the LM IC substrate. Products Applications Audio www. This user’s guide details the design of a demonstration board which provides a 3. The design of the demonstration board is detailed below. Buyer acknowledges and agrees that any military or aerospace use of TI components which have not been so designated is solely at the Buyer’s risk, and that Buyer is solely responsible for compliance with all legal and regulatory requirements in connection with such use.

Calculate the feedback resistors The ratio of the feedback resistors can be calculated from the following equation: Information published by TI regarding third-party products or services does not constitute a license to use such products or services or a warranty or endorsement thereof.

Resale of TI components or services with statements different from or beyond the parameters stated by TI for that component or service voids all express and any implied warranties for the associated TI component or service and is an unfair and deceptive business practice. The time is determined from the following equation: Vias should be added to connect the ground of the input capacitors to a ground plane, located as close to the capacitor as possible.


Buyers should obtain the latest relevant information before placing orders and should verify that such information is current and complete. The input capacitor is calculated from: A low ESR 0. A load which creates significant transients requires a larger output capacitor than a fixed load.

LMQ1 from Texas Instruments

C8 should be no smaller than nF for stability, and should be a good quality, low ESR, ceramic capacitor. Judicious positioning of the PC board within the end product, along with the use of any available air flow forced or natural convection can help reduce the junction temperature.

Documents Flashcards Grammar checker. I wish to measure a very low resistance of the order of an ohm. Information of third parties may be subject to additional restrictions. If the output voltage is higher than 1.

AN-1646 LM3102 Demonstration Board

Buyers are responsible for their products and applications using TI components. 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.

The operating frequency remains constant with line variations due to the inverse relationship between the input voltage and the on-time. Headline Bold Ipsum lorem Headline Light. The bootstrap capacitor C4 should be connected as close to the SW and BST pins as daatsheet, and the connecting traces should be thick.

Synchronous 1MHz 2.5A Step-Down Voltage Regulator

Nonetheless, such components are subject to these terms. Testing and other quality control techniques are used to the extent TI deems necessary to support this warranty. Buyer represents and agrees that it has all the necessary expertise to create and implement safeguards which anticipate dangerous consequences of failures, monitor failures and their consequences, lessen the likelihood of failures that might cause harm and take appropriate remedial actions.

The average current during the on-time is the load current. Determine the value of other components C1 and C2: Using numerous vias to connect the die attached pad to the ground plane is a good practice.


Experimentation is usually necessary to determine the minimum value for the output capacitor, datasehet the nature of the load may require a larger value. TI does not warrant or 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.

TI is not responsible or liable for any such statements. Additionally the use of thick traces, where possible, can help conduct heat away from the LM For a worst case calculation, the input capacitor must be capable of supplying this average load current during the maximum on-time.

Typical performance dstasheet operating waveforms are also provided for reference. 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.

LM datasheet, Pinout ,application circuits LM3 Molded Inductor

Except where mandated by applicable law, testing of all parameters of each component is not necessarily performed. The Constant On-Time COT regulation scheme requires no loop compensation, results in a fast load transient response and simple circuit implementation that datasheeh a low component count, and consequently very small overall board space is required for a typical application.

Calculate the on-time setting resistor The switching frequency fSW of the demonstration board is affected by the on-time ton of the LM, which is determined by R1. The capacitor at the SS pin determines the soft-start time, pm3102 is, the time for the reference voltage at the regulation comparator and the output voltage to reach their final value.