Buck Regulator, Switching, Adjustable Output Voltage, 1.0 A

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Overview

The LM2575 series of Buck Switching Regulators are monolithic integrated circuits ideally suited for easy and convenient design of a step-down switching regulator (buck converter). All circuits of this series are capable of driving a 1.0 A loadwith excellent line and load regulation. These devices are available in fixedoutput voltages of 3.3 V, 5.0 V, 12 V, 15 V, and an adjustable output version.

This Buck Switching Regulator is designed to minimize the number of external components to simplify the power supply design. Standard series of inductors optimized for use with the LM2575 are offered by several different inductor manufacturers.

Since the LM2575 converter is a switch-mode power supply, its efficiency is significantly higher in comparison with popular three-terminal linear regulators, especially with higher input voltages. In many cases, the power dissipated by the LM2575 regulator is so low, that no heatsink is required or its size could be reduced dramatically.

The LM2575 features include a guaranteed 4% tolerance on output voltage within specified input voltages and output load conditions, and +/-10% on the oscillator frequency (+/-2% over 0C to 125C). External shutdown is included, featuring 80 uA typical standby current. The output switch includes cycle-by-cycle current limiting, as well as thermal shutdown for full protection under fault conditions.

  • Simple and High-Efficiency Step-Down (Buck) Regulators
  • Efficient Pre-Regulator for Linear Regulators
  • On-Card Switching Regulators
  • Positive to Negative Converters (Buck-Boost)
  • Negative Step-Up Converters
  • Power Supply for Battery Chargers
  • 3.3 V, 5.0 V, 12 V, 15 V, and Adjustable Output Versions
  • Adjustable Version Output Voltage Range of 1.23 V to 37 V +/-4%
    Maximum Over Line and Load Conditions
  • Guaranteed 1.0 A Output Current
  • Wide Input Voltage Range: 4.75 V to 40 V
  • Requires Only 4 External Components
  • 52 kHz Fixed Frequency Internal Oscillator
  • TTL Shutdown Capability, Low Power Standby Mode
  • High Efficiency
  • Uses Readily Available Standard Inductors
  • Thermal Shutdown and Current Limit Protection
  • Moisture Sensitivity Level (MSL) Equals 1
  • Pb-Free Packages are Available

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16

Product

Status

ECAD Models

Compliance

Package Type

Case Outline

MSL Type

MSL Temp (°C)

Container Type

Container Qty.

ON Target

Topology

Control Mode

VCC Min (V)

VCC Max (V)

VO Typ (V)

IO Typ (A)

Efficiency (%)

fSW Typ (kHz)

Pricing ($/Unit)

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LM2575D2T-ADJR4G

Active

Pb

A

H

P

D2PAK-5

1

260

REEL

800

N

Step-Down

Voltage Mode

7

40

1.23 to 37

1

85

52

$1.1132

More Details

LM2575D2T-ADJG

Active

Pb

A

H

P

D2PAK-5

1

260

TUBE

50

N

Step-Down

Voltage Mode

7

40

1.23

1

85

52

$1.0669

More Details

LM2575TV-ADJG

Active

Pb

A

H

P

TO-220-5

NA

0

TUBE

50

N

Step-Down

Voltage Mode

7

40

1.23

1

85

52

$1.1733

More Details

LM2575D2T-5G

Active

Pb

A

H

P

D2PAK-5

1

260

TUBE

50

N

Step-Down

Voltage Mode

7

40

5

1

85

52

$1.1166

More Details

LM2575D2T-15R4G

Active

Pb

A

H

P

D2PAK-5

1

260

REEL

800

N

Step-Down

Voltage Mode

7

40

15

1

85

52

$0.8349

More Details

LM2575D2T-5R4G

Active

Pb

A

H

P

D2PAK-5

1

260

REEL

800

N

Step-Down

Voltage Mode

7

40

5

1

85

52

$1.21

More Details

LM2575D2T-3.3R4G

Active

Pb

A

H

P

D2PAK-5

1

260

REEL

800

N

Step-Down

Voltage Mode

7

40

3.3

1

85

52

$1.0709

More Details

LM2575T-3.3G

Active

Pb

A

H

P

TO-220-5

NA

0

TUBE

50

N

Step-Down

Voltage Mode

7

40

3.3

1

85

52

$0.9494

More Details

LM2575D2T-12R4G

Active

Pb

A

H

P

D2PAK-5

1

260

REEL

800

N

Step-Down

Voltage Mode

7

40

12

1

85

52

$1.2245

More Details

LM2575T-ADJG

Active

Pb

A

H

P

TO-220-5

NA

0

TUBE

50

N

Step-Down

Voltage Mode

7

40

1.23

1

85

52

$1.0794

More Details

LM2575T-5G

Active

Pb

A

H

P

TO-220-5

NA

0

TUBE

50

N

Step-Down

Voltage Mode

7

40

5

1

85

52

$1.1874

More Details

LM2575T-15G

Lifetime

Pb

A

H

P

TO-220-5

NA

0

TUBE

50

N

Step-Down

Voltage Mode

7

40

15

1

85

52

$0.9494

More Details

LM2575TV-5G

Lifetime

Pb

A

H

P

TO-220-5

NA

0

TUBE

50

N

Step-Down

Voltage Mode

7

40

5

1

85

52

$1.0496

More Details

LM2575TV-012G

Lifetime

Pb

A

H

P

TO-220-5

NA

0

TUBE

50

N

Step-Down

Voltage Mode

7

40

12

1

85

52

$0.9494

More Details

LM2575T-12G

Lifetime

Pb

A

H

P

TO-220-5

NA

0

TUBE

50

N

Step-Down

Voltage Mode

7

40

12

1

85

52

$1.0794

More Details

LM2575TV-3.3G

Lifetime

Pb

A

H

P

TO-220-5

NA

0

TUBE

50

N

Step-Down

Voltage Mode

7

40

3.3

1

85

52

$0.9494

More Details

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