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LM2575: Buck Regulator, Switching, Adjustable Output Voltage, 1.0 A

Datasheet: 1.0 A, Adjustable Output Voltage, Step-Down Switching Regulator
Rev. 11 (492.0kB)
Product Overview
»View Reliability Data
»View Material Composition
» Product Change Notification
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.
Features
 
  • 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
Applications
  • 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
Technical Documentation & Design Resources
Data Sheets (1) FAQ (1)
Package Drawings (3)  
Availability & Samples
Specifications
Interactive Block Diagram
Product
Status
Compliance
Description
Package
MSL
Container
Budgetary Price/Unit
Type
Case Outline
Type
Temperature
Type
Qty.
LM2575D2T-012G Obsolete 
Pb-free
Halide free
LM2575, 12 V D2PAK-5 936A-02 1 260 Tube 50  
LM2575D2T-015G Obsolete 
Pb-free
Halide free
LM2575, 15 V D2PAK-5 936A-02 1 260 Tube 50  
LM2575D2T-12R4G Active
Pb-free
Halide free
LM2575, 12 V D2PAK-5 936A-02 1 260 Tape and Reel 800 $1.21
LM2575D2T-15R4G Active
Pb-free
Halide free
LM2575, 15 V D2PAK-5 936A-02 1 260 Tape and Reel 800 Contact Sales Office
LM2575D2T-3.3G Obsolete 
Pb-free
Halide free
LM2575, 3.3 V D2PAK-5 936A-02 1 260 Tube 50  
LM2575D2T-3.3R4G Active
Pb-free
Halide free
LM2575, 3.3 V D2PAK-5 936A-02 1 260 Tape and Reel 800 $0.9636
LM2575D2T-5G Active
Pb-free
Halide free
LM2575, 5.0 V D2PAK-5 936A-02 1 260 Tube 50 $1.1166
LM2575D2T-5R4G Active
Pb-free
Halide free
LM2575, 5.0 V D2PAK-5 936A-02 1 260 Tape and Reel 800 $1.21
LM2575D2T-ADJG Active
Pb-free
Halide free
LM2575, Adjustable 1.23 V to 37 V D2PAK-5 936A-02 1 260 Tube 50 $0.985
LM2575D2T-ADJR4G Active
Pb-free
Halide free
LM2575, Adjustable 1.23 V to 37 V D2PAK-5 936A-02 1 260 Tape and Reel 800 $1.21
LM2575T-12G Active
Pb-free
Halide free
LM2575, 12 V TO-220-5 314D-04 NA Tube 50 $1.1733
LM2575T-15G Active
Pb-free
Halide free
LM2575, 15 V TO-220-5 314D-04 NA Tube 50 Contact Sales Office
LM2575T-3.3G Active
Pb-free
Halide free
LM2575, 3.3 V TO-220-5 314D-04 NA Tube 50 Contact Sales Office
LM2575T-5G Active
Pb-free
Halide free
LM2575, 5.0 V TO-220-5 314D-04 NA Tube 50 $1.1733
LM2575T-ADJG Active
Pb-free
Halide free
LM2575, Adjustable 1.23 V to 37 V TO-220-5 314D-04 NA Tube 50 $1.1733
LM2575TV-005G Obsolete 
Pb-free
Halide free
LM2575 TO-220-5 314B-05 NA Tube 50  
LM2575TV-012G Active
Pb-free
Halide free
LM2575, 12 V TO-220-5 314B-05 NA Tube 50 Contact Sales Office
LM2575TV-15G Obsolete 
Pb-free
Halide free
LM2575, 15 V TO-220-5 314B-05 NA Tube 50  
LM2575TV-3.3G Active
Pb-free
Halide free
LM2575, 3.3 V TO-220-5 314B-05 NA Tube 50 Contact Sales Office
LM2575TV-5G Active
Pb-free
Halide free
LM2575, 5.0 V TO-220-5 314B-05 NA Tube 50 $0.9226
LM2575TV-ADJG Active
Pb-free
Halide free
LM2575, 1.23 V to 37 V TO-220-5 314B-05 NA Tube 50 $1.1733
Market Leadtime (weeks) : Contact Factory
Market Leadtime (weeks) : Contact Factory
Market Leadtime (weeks) : Contact Factory
Market Leadtime (weeks) : Contact Factory
PandS   (2020-09-14 00:00) : <100
Market Leadtime (weeks) : Contact Factory
Market Leadtime (weeks) : 17 to 20
Market Leadtime (weeks) : 2 to 4
ON Semiconductor   (2020-09-02 00:00) : 300
Avnet   (2020-08-19 00:00) : <100
FutureElectronics   (2020-08-19 00:00) : <1K
Market Leadtime (weeks) : Contact Factory
FutureElectronics   (2020-08-19 00:00) : >1K
PandS   (2020-09-14 00:00) : <1K
Market Leadtime (weeks) : 2 to 4
Avnet   (2020-08-19 00:00) : <100
FutureElectronics   (2020-08-19 00:00) : <1K
Market Leadtime (weeks) : 8 to 12
Avnet   (2020-08-19 00:00) : <1K
FutureElectronics   (2020-08-19 00:00) : >10K
PandS   (2020-09-14 00:00) : <1K
Market Leadtime (weeks) : Contact Factory
PandS   (2020-09-14 00:00) : <1K
FutureElectronics   (2020-08-19 00:00) : <1K
Market Leadtime (weeks) : Contact Factory
PandS   (2020-09-14 00:00) : >1K
ON Semiconductor   (2020-09-02 00:00) : 700
Market Leadtime (weeks) : Contact Factory
ON Semiconductor   (2020-09-02 00:00) : 3,800
FutureElectronics   (2020-08-19 00:00) : <100
PandS   (2020-09-14 00:00) : >1K
Market Leadtime (weeks) : 17 to 20
PandS   (2020-09-14 00:00) : >10K
Avnet   (2020-08-19 00:00) : <1K
FutureElectronics   (2020-08-19 00:00) : >1K
Market Leadtime (weeks) : 17 to 20
PandS   (2020-09-14 00:00) : <1K
FutureElectronics   (2020-08-19 00:00) : >1K
Market Leadtime (weeks) : Contact Factory
Market Leadtime (weeks) : Contact Factory
ON Semiconductor   (2020-09-02 00:00) : 1,050
Market Leadtime (weeks) : Contact Factory
PandS   (2020-09-14 00:00) : <100
Market Leadtime (weeks) : Contact Factory
ON Semiconductor   (2020-09-02 00:00) : 2,450
Market Leadtime (weeks) : 2 to 4
FutureElectronics   (2020-08-19 00:00) : <100
Market Leadtime (weeks) : 17 to 20
PandS   (2020-09-14 00:00) : <100
FutureElectronics   (2020-08-19 00:00) : <1K
Avnet   (2020-08-19 00:00) : <1K

Product
Description
Pricing ($/Unit)
Compliance
Status
Topology
Control Mode
VCC Min (V)
VCC Max (V)
VO Typ (V)
IO Typ (A)
Efficiency (%)
fSW Typ (kHz)
Package Type
LM2575D2T-12R4G  
 $1.21 
Pb
H
 Active   
Step-Down
Voltage Mode
7
40
12
1
85
52
D2PAK-5
LM2575D2T-15R4G  
Pb
H
 Active   
Step-Down
Voltage Mode
7
40
15
1
85
52
D2PAK-5
LM2575D2T-3.3R4G  
 $0.9636 
Pb
H
 Active   
Step-Down
Voltage Mode
7
40
3.3
1
85
52
D2PAK-5
LM2575D2T-5G  
 $1.1166 
Pb
H
 Active   
Step-Down
Voltage Mode
7
40
5
1
85
52
D2PAK-5
LM2575D2T-5R4G  
 $1.21 
Pb
H
 Active   
Step-Down
Voltage Mode
7
40
5
1
85
52
D2PAK-5
LM2575D2T-ADJG  
 $0.985 
Pb
H
 Active   
Step-Down
Voltage Mode
7
40
1.23 to 37
1
85
52
D2PAK-5
LM2575D2T-ADJR4G  
 $1.21 
Pb
H
 Active   
Step-Down
Voltage Mode
7
40
1.23 to 37
1
85
52
D2PAK-5
LM2575T-12G  
 $1.1733 
Pb
H
 Active   
Step-Down
Voltage Mode
7
40
12
1
85
52
TO-220-5
LM2575T-15G  
Pb
H
 Active   
Step-Down
Voltage Mode
7
40
15
1
85
52
TO-220-5
LM2575T-3.3G  
Pb
H
 Active   
Step-Down
Voltage Mode
7
40
3.3
1
85
52
TO-220-5
LM2575T-5G  
 $1.1733 
Pb
H
 Active   
Step-Down
Voltage Mode
7
40
5
1
85
52
TO-220-5
LM2575T-ADJG  
 $1.1733 
Pb
H
 Active   
Step-Down
Voltage Mode
7
40
1.23 to 37
1
85
52
TO-220-5
LM2575TV-012G  
Pb
H
 Active   
Step-Down
Voltage Mode
7
40
12
1
85
52
TO-220-5
LM2575TV-3.3G  
Pb
H
 Active   
Step-Down
Voltage Mode
7
40
3.3
1
85
52
TO-220-5
LM2575TV-5G  
 $0.9226 
Pb
H
 Active   
Step-Down
Voltage Mode
7
40
5
1
85
52
TO-220-5
LM2575TV-ADJG  
 $1.1733 
Pb
H
 Active   
Step-Down
Voltage Mode
7
40
1.23 to 37
1
85
52
TO-220-5
Case Outlines
314D-04    314B-05    936A-02   
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