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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AN-1646 LM3102 Demonstration Board

Low ESR also helps ensure a complete recharge during each off-time. The function of the input capacitor is datashfet supply most of the main MOSFET current during the on-time, and limit the voltage lm302 at the VIN pin, assuming that the voltage source feeding to the VIN pin has finite output impedance. 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.

Determine the value of other components C1 and C2: 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.

Testing and other quality control techniques are used to the extent TI deems necessary to support this warranty. The time is determined from the following equation: C8 should be no smaller than nF for stability, and should be a good quality, low ESR, ceramic capacitor. 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.


In this demonstration board, a 10 nF capacitor is used. A nF capacitor is used in this demonstration board. TI is not responsible or liable for any such statements.

Except where mandated by applicable law, testing of all parameters of each component is not necessarily performed. Buyer acknowledges and agrees that it is solely responsible for compliance with all legal, regulatory and safety-related requirements concerning its products, and any use of TI components in its applications, notwithstanding any applications-related information or support that may be provided by TI.

A low ESR 0. Reproduction of significant portions of TI information in TI data books or data sheets is permissible only if reproduction is without alteration and is accompanied by all associated warranties, conditions, limitations, and notices. Nonetheless, such components are subject to these terms. In some cases, TI components may be promoted specifically to facilitate safety-related applications. The capacitor at the SS pin determines the soft-start time, that is, the time for the reference voltage at the regulation comparator and the output voltage to reach their final value.

Once ILR is selected, L can be determined by: The average current during the on-time is the load current. A load which creates significant transients requires a larger output capacitor than a fixed load. Buyer will fully indemnify TI and its representatives against any damages arising out of the use of any TI components in safety-critical applications. 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.

Protection features include output over-voltage protection, thermal shutdown, VCC undervoltage lock-out, gate drive under-voltage lock-out. 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.


To ensure that the on-time is larger than the minimum limit, which is ns, the value of R1 must satisfy the following equation: How much energy is.

The design of the demonstration board is detailed below. Headline Bold Ipsum lorem Headline Light. Information of third parties may be subject to additional restrictions. Buyer datawheet and agrees that it has all the necessary expertise lm31022 create and implement safeguards which anticipate dangerous consequences of failures, monitor failures and their consequences, lessen the likelihood of datahseet that might cause harm and take appropriate remedial actions.

LM datasheet, Pinout ,application circuits Synchronous 1MHz A Step-Down Voltage Regulator

The output capacitor C10, C11 should be connected close to the load and tied directly to the ground plane. Buyers are responsible for their daatsheet and applications using TI components. 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.

Products Applications Audio www. Additionally the use of thick traces, where possible, can help datashee heat away from the LM Calculate the feedback resistors The ratio of the feedback resistors can be calculated from the following equation: Layout is therefore critical for optimum performance. For a worst case calculation, the input capacitor must be capable of supplying this average load current during the maximum on-time. Information published by TI regarding third-party products or services does not constitute a license to use such products datasjeet services or a warranty or endorsement thereof.