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LM2675 Datasheet PDF

Part Series:LM2675 Series
Description:SIMPLE SWITCHER® 6.5V to 40V, 1A Low Component Count Step-Down Regulator
Document:LM2675M-ADJ Datasheet PDF (32 Pages)

LM2675 Datasheet PDF

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Conv DC-DC 8V to 40V Step Down Single-Out 12V 1A 8Pin SOIC Tube
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Conv DC-DC 8V to 40V Step Down Single-Out 12V 1A 8Pin PDIP Tube
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Conv DC-DC 8V to 40V Step Down Single-Out 5V 1A 16Pin WSON EP T/R
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Conv DC-DC 8V to 40V Step Down Single-Out 3.3V 1A 8Pin SOIC Tube
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Evaluation Board, 5V, 1A Regulator, Step Down Switching Regulator, Efficiency 96%, Vin 8V-40V
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Conv DC-DC 8V to 40V Step Down Single-Out 12V 1A 8Pin SOIC Tube
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SIMPLE SWITCHER® 6.5V to 40V, 1A Low Component Count Step-Down Regulator

LM2675 - TI Function Overview

The LM2675 series of regulators are monolithic integrated DC-DC converter circuits 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 and a fixed frequency oscillator.
The LM2675 series operates at a switching frequency of 260 kHz, thus allowing smaller-sized filter components than what would be needed 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 needed.
A family of standard inductors for use with the LM2675 are available from several different manufacturers. This feature greatly simplifies the design of switch-mode power supplies using these advanced ICs. Also included in the data sheet are selector guides for diodes and capacitors designed to work in switch-mode power supplies.
Other features include ±1.5%-tolerance on output voltage within specified input voltages and output load conditions, and ±10% on the oscillator frequency. External shutdown is included, featuring typically 50-µA standby current. The output switch includes current limiting, as well as thermal shutdown for full protection under fault conditions.
Efficiency up to 96%
Available in 8-Pin SOIC, PDIP, and 16-Pin WSON
Package
Requires only 5 External Components
3.3-V, 5-V, 12-V, and Adjustable Output Versions
Adjustable Version Output Voltage Range: 1.21 V
to 37 V
±1.5% Maximum Output Voltage Tolerance Over
Line and Load Conditions
Ensured 1-A Output Load Current
Wide Input Voltage Range: 8 V to 40 V
260-kHz Fixed Frequency Internal Oscillator
TTL Shutdown Capability, Low-Power Standby
Mode
Thermal Shutdown and Current Limit Protection
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