LM2672

SIMPLE SWITCHER® 6.5V 至 40V、1A 低组件数降压稳压器

The series of regulators are monolithic integrated DC-DC converter built with a LMDMOS process. These regulators provide all the active functions for a step-down buck switching regulator, capable of driving a 1-A load current with excellent line and load regulation. These devices are available in fixed output voltages of 3.3 V, 5 V, 12 V, and an adjustable output version.

Requiring a minimum number of external components, these regulators are simple to use and include patented internal frequency compensation, fixed frequency oscillator, external shutdown, soft-start, and frequency synchronization.

The LM2672 series operates at a switching frequency of 260 kHz, thus allowing smaller sized filter components than what is required with lower frequency switching regulators. Because of its very high efficiency >90%, the copper traces on the printed-circuit board are the only heat sinking required.

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Efficiency up to 96%

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Available in 8-Pin SOIC and PDIP Packages

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Requires only 5 External Components

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3.3-V, 5-V, 12-V, and Adjustable Output Versions

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Adjustable Version Output Voltage Range: 1.21 V

to 37 V

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±1.5% Maximum Output Voltage Tolerance Over

Line and Load Conditions

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Specified 1-A Output Load Current

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Wide Input Voltage Range: 8 V to 40 V

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260-kHz Fixed Frequency Internal Oscillator

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TTL Shutdown Capability, Low Power Standby

Mode

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Soft-Start and Frequency Synchronization

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Thermal Shutdown and Current Limit Protection