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LM2670 Datasheet PDF

Part Series:LM2670 Series
Description:SIMPLE SWITCHER High Efficiency 3A Step-Down Voltage Regulator with Sync
Document:LM2670S-ADJ/NOPB Datasheet PDF (38 Pages)

LM2670 Datasheet PDF

38 Pages
TI
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Conv DC-DC 8V to 40V Step Down Single-Out 12V 3A 8Pin(7+Tab) TO-263 T/R
38 Pages
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Conv DC-DC 8V to 40V Step Down Single-Out 1.2V to 37V 3A 14Pin VSON EP T/R
38 Pages
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Conv DC-DC 8V to 40V Step Down Single-Out 5V 3A 14Pin VSON EP T/R
38 Pages
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Conv DC-DC 8V to 40V Step Down Single-Out 1.2V to 37V 3A 14Pin VSON EP T/R
38 Pages
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Conv DC-DC 8V to 40V Step Down Single-Out 3.3V 3A 14Pin VSON EP T/R
38 Pages
TI
Conv DC-DC 8V to 40V Step Down Single-Out 12V 3A 14Pin VSON EP T/R
38 Pages
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Conv DC-DC 8V to 40V Step Down Single-Out 12V 3A 7Pin(7+Tab) TO-220 Tube
38 Pages
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38 Pages
TI
Conv DC-DC 8V to 40V Step Down Single-Out 5V 3A 7Pin(7+Tab) TO-220 Tube
38 Pages
TI
Conv DC-DC 8V to 40V Step Down Single-Out 3.3V 3A 14Pin VSON EP T/R
38 Pages
TI
SIMPLE SWITCHER High Efficiency 3A Step-Down Voltage Regulator with Sync

LM2670 - TI Function Overview

The LM2670 series of regulators are monolithic integrated circuits which provide all of the active functions for a step-down (buck) switching regulator capable of driving up to 3-A loads with excellent line and load regulation characteristics. High efficiency (>90%) is obtained through the use of a low ON-resistance DMOS power switch. The series consists of fixed output voltages of 3.3-V, 5-V, and 12-V output version.
The SIMPLE SWITCHER® concept provides for a complete design using a minimum number of external components. The switching clock frequency can be provided by an internal fixed frequency oscillator (260 kHz) or from an externally provided clock in the range of 280 kHz to 400 kHz which allows the use of physically smaller sized components. A family of standard inductors for use with the LM2670 are available from several manufacturers to greatly simplify the design process. The external sync clock provides direct and precise control of the output ripple frequency for consistent filtering or frequency spectrum positioning.
The LM2670 series also has built-in thermal shutdown, current limiting and an ON/OFF control input that can power down the regulator to a low 50-µA quiescent current standby condition. The output voltage is ensured to a ±2% tolerance.
Efficiency Up to 94%
Simple and Easy to Design With (Using Off-the-
Shelf External Components)
150-mΩ DMOS Output Switch
3.3-V, 5-V, 12-V Fixed Output and Adjustable
(1.2 V to 37 V) Versions
50-µA Standby Current When Switched OFF
±2% Maximum Output Tolerance Over Full Line
and Load Conditions
Wide Input Voltage Range: 8 V to 40 V
External Sync Clock Capability
(280 kHz to 400 kHz)
260-kHz Fixed Frequency Internal Oscillator
–40 to 125°C Operating Junction Temperature Range
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