LM2574: Buck Regulator, Switching, Adjustable Output Voltage, 0.5 A
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The LM2574 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 0.5 A loadwith excellent line and load regulation. These devices are available in fixed output voltages of 3.3 V, 5.0 V, 12 V, 15 V, and an adjustable output version.
The 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 LM2574 are offered by several different inductor manufacturers.
Since the LM2574 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 LM2574 regulator is so low, that no heatsink is required or its size could be reduced dramatically.
The LM2574 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.
The 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 LM2574 are offered by several different inductor manufacturers.
Since the LM2574 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 LM2574 regulator is so low, that no heatsink is required or its size could be reduced dramatically.
The LM2574 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.
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Technical Documentation & Design Resources
Data Sheets (1) | Package Drawings (2) |
Availability & Samples
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Specifications
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Intaractive Block Diagram
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Case Outline |
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LM2574DW-ADJR2G | Active |
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LM2574, Adjustable 1.23 V to 37 V | SOIC-16W | 751G-03 | 3 | 260 | Tape and Reel | 1000 | $0.9312 | ||||||||
LM2574N-015G |
Obsolete ![]() |
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LM2574, 15 V | PDIP-8 | 626-05 | NA | Tube | 50 | ||||||||||
LM2574N-12G | Active |
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LM2574, 12 V | PDIP-8 | 626-05 | NA | Tube | 50 | $0.9312 | |||||||||
LM2574N-3.3G |
Obsolete ![]() |
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LM2574, 3.3 V | PDIP-8 | 626-05 | NA | Tube | 50 | ||||||||||
LM2574N-5G | Active |
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LM2574, 5.0 V | PDIP-8 | 626-05 | NA | Tube | 50 | $0.7141 | |||||||||
LM2574N-ADJG | Active |
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LM2574, Adjustable 1.23 V to 37 V | PDIP-8 | 626-05 | NA | Tube | 50 | $0.7694 | |||||||||
NCV2574DW-ADJR2G | Active |
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LM2574, Adjustable 1.23 V to 37 V | SOIC-16W | 751G-03 | 3 | 260 | Tape and Reel | 1000 | $1.2933 | ||||||||
LM2574DW-ADJ | Obsolete |
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LM2574 | SOIC-16W | 751G-03 | 1 | 235 | Tube | 47 | |||||||||
NCV2574DW-ADJR2 | Obsolete |
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LM2574 | SOIC-16W | 751G-03 | 1 | 235 | Tape and Reel | 1000 |
Market Leadtime (weeks) | : | Contact Factory |
PandS (2020-09-14 00:00) | : | <1K |
Market Leadtime (weeks) | : | Contact Factory |
Market Leadtime (weeks) | : | 4 to 8 |
PandS (2020-09-14 00:00) | : | >1K |
Market Leadtime (weeks) | : | Contact Factory |
Market Leadtime (weeks) | : | Contact Factory |
Avnet (2020-08-19 00:00) | : | >1K |
FutureElectronics (2020-08-19 00:00) | : | >1K |
Market Leadtime (weeks) | : | Contact Factory |
Avnet (2020-08-19 00:00) | : | >1K |
PandS (2020-09-14 00:00) | : | >1K |
Market Leadtime (weeks) | : | 2 to 4 |
PandS (2020-09-14 00:00) | : | <1K |
ON Semiconductor (2020-09-02 00:00) | : | 10,000 |
Market Leadtime (weeks) | : | Contact Factory |
Market Leadtime (weeks) | : | Contact Factory |
Product
Description
Pricing ($/Unit)
Compliance
Status
Topology
Control Mode
VCC Min (V)
VCC Max (V)
VO Typ (V)
IO Typ (A)
Efficiency (%)
fSW Typ (kHz)
Package Type
LM2574DW-ADJR2G
$0.9312
Pb
A
H
P
Active
Step-Down
Voltage Mode
7
40
1.23 to 37
0.5
85
52
SOIC-16W
LM2574N-ADJG
$0.7694
Pb
A
H
P
Active
Step-Down
Voltage Mode
7
40
1.23 to 37
0.5
85
52
PDIP-8
NCV2574DW-ADJR2G
$1.2933
Pb
A
H
P
Active
Step-Down
Voltage Mode
7
40
1.23 to 37
0.5
85
52
SOIC-16W
Application
Diagram - Block
Support |