Buck Regulator, Switching, 0.5 A

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Overview

The LM2594 series of Buck Switching Regulators are monolithic integrated circuits that provide all the active functions for a step-down (buck) switching regulator, capable of driving a 1A load with excellent line and load regulation.

Requiring a minimum number of external components, these Buck Switching Regulators are simple to use and include internal frequency compensation, and a fixed-frequency oscillator.

The LM2594 series operates at a switching frequency of 150 kHz thus allowing smaller sized filter components than what would be needed with lower frequency switching regulators. Available in a standard 8-lead PDIP package and 8-lead SOIC surface mount package.

A standard series of inductors are available from several different manufacturers optimized for use with the LM2594 series. This feature greatly simplifies the design of switch-mode power supplies.

Other features include a guaranteed +/-4% tolerance on output voltage under specified input voltage and output load conditions, and +/-15% on the oscillator frequency. External shutdown is included, featuring typically 80 µA standby current. Self protection features include a two stage frequency reducing current limit for the output switch and an over temperature shutdown for complete protection under fault conditions. See LM2596 for 3.0A and LM2595 for 1.0A.

  • Simple high-efficiency step-down (buck) regulator
  • On-card switching regulators
  • Positive to negative converter
  • LCD-TV SMPS
  • Adjustable output voltage range, 1.2V to 37V +/-4% max over line and load
  • Available in TO-220 and D2PAK packages
  • Guaranteed 0.5A output load current
  • Input voltage range up to 40V
  • Excellent line and load regulation specifications
  • 150 kHz fixed frequency internal oscillator
  • TTL shutdown capability
  • Low power standby mode, Iq typically 80 µA
  • Uses readily available standard inductors
  • Thermal shutdown and current limit

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LM2594DADJR2G

Active

Pb

A

H

P

SOIC-8

1

260

REEL

2500

Y

Step-Down

Voltage Mode

4.5

40

1.23

0.5

85

150

$0.9968

More Details

LM2594DADJG

Obsolete

Pb

A

H

P

SOIC-8

1

260

TUBE

98

N

Step-Down

Voltage Mode

4.5

40

1.23

0.5

85

150

Price N/A

More Details

LM2594PADJG

Obsolete

Pb

A

H

P

PDIP-8

NA

0

TUBE

50

N

Step-Down

Voltage Mode

4.5

40

1.23

0.5

85

150

Price N/A

More Details

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