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 capacitor at the SS pin determines the soft-start datashest, that is, the time for the reference voltage at the regulation comparator and the output voltage to reach their final value. Determine the value of other components C1 and C2: Using lm312 vias to connect the die attached pad to the ground plane is a good practice. 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 adtasheet, and that Buyer is solely responsible for compliance with all legal and regulatory requirements in connection with such use.

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. It then drops to zero at turn-off.

LM (NSC) PDF技术资料下载 LM 供应信息 IC Datasheet 数据表 (1/18 页)

The function of the input capacitor is to supply most of the main MOSFET current during the on-time, and limit the voltage ripple at the VIN pin, assuming that the voltage source feeding to the VIN pin has finite output impedance.

Low ESR also helps ensure a complete recharge during each off-time. Lab 6 in this note. The output capacitor C10, C11 should be connected close to the load and tied directly to the ground plane. Calculate the on-time setting resistor The switching frequency fSW of the demonstration datahseet is affected by the on-time ton of the LM, which is determined by R1.


LM3102 PDF Datasheet浏览和下载

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. 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.

C8 should be no smaller than nF for stability, and should be a good quality, low ESR, datasheet capacitor. If the output voltage is higher than 1. This user’s guide details the design of a demonstration board which provides a 3.

The exposed pad is internally connected to the LM IC substrate.

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

The time is determined from the following equation: Layout is therefore critical for optimum performance. Protection features include output over-voltage protection, thermal shutdown, VCC undervoltage lock-out, gate drive under-voltage lock-out.

A nF capacitor is used in this demonstration board. Typical performance and operating waveforms datashset also provided for reference.

Synchronous 1MHz 2.5A Step-Down Voltage Regulator

The design of the demonstration datashest is detailed below. Products Applications Audio www. Use of such information may require a datashest 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. Information of third parties may be subject to additional restrictions.

Buyer will fully indemnify TI and its representatives against any damages arising out of the use of any TI components in safety-critical applications.


Lm31022 ensure that the on-time is larger than the minimum limit, which is ns, the value of R1 must satisfy the following equation: TI is not responsible or liable for such altered documentation. A load which creates significant transients requires a larger output capacitor than a fixed load.

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. In this demonstration board, a 10 nF capacitor is used. Buyers are responsible for their products and applications using TI components.

I wish to measure a very low resistance of the order of an ohm. Information published by TI regarding third-party lmm3102 or services does not constitute a license to use such products or services or a warranty or endorsement thereof.

The exposed pad on the bottom of the LM IC package can be soldered to the ground plane, which should extend out from datsheet the LM to help dissipate heat. Datashedt 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.

Once ILR is selected, L can be determined by: 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. For a worst case calculation, the input capacitor must be capable of supplying this average load current during the maximum on-time.